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Hardware-in-loop Simulation(HLS) of Homing Anti-tank Missile 被引量:1
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作者 宋建梅 张天桥 《Journal of Beijing Institute of Technology》 EI CAS 1996年第1期49-54,共6页
The simulation techniques of hardware-in-loop simulation(HLS) of homing antitank missile based on the personal computer (PC) are discussed. The PC and MCS-96 chip controller employ A/D and D/A boards (with photoelectr... The simulation techniques of hardware-in-loop simulation(HLS) of homing antitank missile based on the personal computer (PC) are discussed. The PC and MCS-96 chip controller employ A/D and D/A boards (with photoelectricity isolation) to transfer measur ment and control information about homing head, gyro and rudder and utilize the digital hand shaking board to build correct communication communication protocol. In order to satisfy the real-time requirement of HLS, this paper first simplifies the aerodynamic data file reasonably, then builds a PC software with C language. The program of the controller part is made with PL/M language. The simulation of HLS based on PC is done with the same sampling period of 10ms as that of YH-F1 and the experiment results are identical to those of digital simulation of the homing anti-tank guided missile. 展开更多
关键词 hardware-in-loop simulation communication protocol aerodynamic data
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Hardware-in-loop simulation on hydrostatic thrust bearing worktable pose 被引量:1
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作者 韩桂华 邵俊鹏 +1 位作者 秦柏 董玉红 《Journal of Central South University》 SCIE EI CAS 2008年第S2期250-256,共7页
A controllable hydrostatic thrust bearing was presented to improve rigidity. The bearing worktable poses were controlled by coupling oilfilm thickness of four controllable chambers. The chamber flow can be regulated b... A controllable hydrostatic thrust bearing was presented to improve rigidity. The bearing worktable poses were controlled by coupling oilfilm thickness of four controllable chambers. The chamber flow can be regulated by electro hydraulic servo valve-control variable pump according to the surface roughness, load, cutting force, and thermal effects of worktable. The mathematical models of the controllable chamber flow, servo variable mechanism and controller were built. The pose control model was established, which contained the kinematics positive and negative solution and control strategy of feedforward and hydraulic cylinder position feedback. Hardware-in-loop simulation experiment was carried out on the electro hydraulic servo test bench by means of the non-linear relation of film thickness and hydraulic cylinder displacement. Hardware-in-loop simulation experiment results show that the controllable bearings exhibit high oilfilm rigidity, the rising time is 0.24 s and the maximum overshoot is 2.23%, and can be applied in high precision heavy machine tool. 展开更多
关键词 HYDROSTATIC THRUST bearing hardware-in-loop simulation worktable POSE CONTROLLABLE CHAMBER
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Matlab Based Human & Hardware-in-Loop Simulation for the Study on Vehicle Stability Control 被引量:1
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作者 张勇 殷承良 张建武 《Journal of Shanghai Jiaotong university(Science)》 EI 2006年第4期498-505,共8页
This paper described an effective method to implement human & hardware in the loop simulation(HHILS), which is based on MATLAB system and can be used to study human driving actions in the abrupt situation and vehi... This paper described an effective method to implement human & hardware in the loop simulation(HHILS), which is based on MATLAB system and can be used to study human driving actions in the abrupt situation and vehicle stability control(VSC). A hybrid control algorithm, which makes full use of the advantages of robust control and fuzzy logic, was adopted in VSC system. The results of HHILS show that HHILS’ application on the vehicle handling and VSC resarch is feasible. These results also confirm that the handling performance of the vehicle with VSC is improved obviously compared to the vehicle without VSC. 展开更多
关键词 HUMAN & hardware-in-loop simulation vehicle stability CONTROL robust-fuzzy CONTROL MATLAB XPC target virtual REALITY
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Study on Hardware-in-loop Simulation of Twin-screw Extruder Experiment System 被引量:1
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作者 Yun-zhou Li,An-li Tao,Jun-guo Liu,Shao-gang Li,Li-na Han,Xiang-zhong Li (College of Information and Electrical Engineering Shandong University of Science and Technology Qingdao,China.) 《Journal of Measurement Science and Instrumentation》 CAS 2010年第S1期91-94,共4页
In order to facilitate the teaching of industrial processes and experiments on the twin-screw extruder control debugging,and be closer to the actual testing,to reduce the debugging costs and the risk of debugging proc... In order to facilitate the teaching of industrial processes and experiments on the twin-screw extruder control debugging,and be closer to the actual testing,to reduce the debugging costs and the risk of debugging process,the paper designs a hardware-in-loop simulation of twin-screw extruder experiment system which is closer to scene,low cost and high safety.The system through the establishment of twin-screw extruder’s mathematical model on computer to simulate the realistic system and there is hardware practicality in the computer simulation loop.The hardware based on C8051F020 can operate in the simulation loop in real time.In computer software design, we desigh man-machine interface that is intuitive and easy to operate,can reflect twin-screw extruder main operation information vividly.Finally,twin-screw extruder’s 3 heater temperature mathematical model and PID incremental control algorithm are presented. 展开更多
关键词 twin-screw extruder hardware-in-loop simulation temperature mathematical model PID control algorithm
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A Hardware-in-Loop Simulation System for Fractionated Spacecraft Cluster 被引量:1
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作者 An Meiyan Wang Zhaokui Zhang Yulin 《Journal of Aerospace Science and Technology》 2015年第1期1-8,共8页
FSC (Fractionated Spacecraft Cluster) is a kind of loosely distributed space system which is comprised of multiple physically independent spacecrafts orbiting closely and interactively communicating via wireless net... FSC (Fractionated Spacecraft Cluster) is a kind of loosely distributed space system which is comprised of multiple physically independent spacecrafts orbiting closely and interactively communicating via wireless network. Spaceborne ad-hoc network, as the physical infrastructure for information exchanging, is one of the enabling technologies of FSC. The demonstration of FSC flying supported by ad-hoc network is worth for the sake of proving the rationality of FSC and seeking technological improvements. Considering this, a NNP (Network Node Prototype) for spaceborne ad-hoc network is developed in this paper, which transmits the information required by the FSC cooperation. Four NNPs are then built up and collaborated into a hardware-in-loop simulation system, in which a typical loose satellite cluster flying mission was performed. The simulation results showed that the NNPs can support the inter-satellite communication for satellite cluster flying. 展开更多
关键词 Fractionated spacecraft cluster spacebome ad-hoc network PROTOTYPE hardware-in-loop simulation.
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IMPROVED QUANTITATIVE FEEDBACK THEORY TECHNIQUE AND APPLICATION TO THREE-AXIS HYDRAULIC SIMULATOR 被引量:1
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作者 YU Jinying ZHAO Keding CAO Jian 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2006年第3期383-386,共4页
In order to meet tracking performance index of three-axis hydraulic simulator, based on classical quantitative feedback theory (QFT), an improved QFT technique is used to synthesize controller of low gain and bandwi... In order to meet tracking performance index of three-axis hydraulic simulator, based on classical quantitative feedback theory (QFT), an improved QFT technique is used to synthesize controller of low gain and bandwidth. By choosing a special nominal plant, the improved method assigns relative magnitude and phase tracking error between system uncertainty and nominal control plant. Relative tracking error induced by system uncertainty is transformed into sensitivity problem and relative tracking error induced by nominal plant forms into a region on Nichols chart. The two constraints further form into a combined bound which is fit for magnitude and phase loop shaping. Because of leaving out pre-filter of classical QFT controller structure, tracking performance is enhanced greatly. Furthermore, a cascaded two-loop control strategy is proposed to heighten control effect. The improved technique's efficacy is validated by simulation and experiment results. 展开更多
关键词 Three-axis hydraulic simulator Quantitative feedback theory(QFT) Cascaded two-loop
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Characteristic Analysis of Off-Axis Meta-Lens
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作者 Jingaowa Hu Yang Liu +4 位作者 Shangnan Zhao Lingjie Wang Haokun Ye Jianping Zhang Xin Zhang 《Optics and Photonics Journal》 2023年第6期87-96,共10页
Meta-lens are a new type of planar optical element that can flexibly manipulate the phase, polarization and amplitude of the beam, and are currently receiving a great deal of attention as they are easier to process an... Meta-lens are a new type of planar optical element that can flexibly manipulate the phase, polarization and amplitude of the beam, and are currently receiving a great deal of attention as they are easier to process and manufacture. Off-axis meta-lens are a special type of meta-lens with a certain degree of dispersion that can be used as a beam-splitting element, providing a unique and feasible way to realize micro-miniature instruments. We analyze the effects of different numerical apertures and off-axis angles on the spectral resolution, focusing efficiency and simulation results of off-axis meta-lens to provide ideas for subsequent research and application of off-axis meta-lens. A number of off-axis meta-lens with parameters NA = 0.408 α = 13°, NA = 0.18 α = 13°<sup></sup> and NA = 0.408 α = 20° were simulated through Lumerical software. The results show that the off-axis angle is related to the resolution;the larger the angle, the better the spectral resolution but the lower the focusing efficiency;when the numerical aperture is smaller, the smaller the coverage of the phase distribution, which will lead to a larger deviation between simulation and theory. The designer needs to balance the numerical aperture, off-axis angle and other parameters reasonably according to the requirements in order to achieve the desired effect. The findings of this study have important reference values for the theoretical analysis of off-axis meta-lens and the design of parameters in practical applications. . 展开更多
关键词 Meta-Lens Off-axis Meta-Lens simulation Analysis
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DEVELOPMENT OF NEW GENERATION THERMOMECHANICAL SIMULATOR-MULTI-AXIS RESTRAINT COMPRESSION(MARC-STRAIN^(TM))SYSTEM
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作者 D. Ferguon W. N. Chen and H. Ferguson (Dynamic Systems Inc. Poestenkill, NY 12140, USA) 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2000年第1期233-241,共9页
Ultrafine grain size is often achieved by severe plastic deformation. A few techniques have been devel- oped to achieve severe plastic deformation,such as equal channel angular (ECA ) processing, torsion, and accumu... Ultrafine grain size is often achieved by severe plastic deformation. A few techniques have been devel- oped to achieve severe plastic deformation,such as equal channel angular (ECA ) processing, torsion, and accumulative roll bonding (ARB) techmpues. This paper will introduce a moftiaxis deformation technique which can achieve essentially unlimited strain with constant deformation volume. The mul- tiaxis deformation can be fully restrained or unrestrained.The bulk volume of a multiaxis restraint compression specimen can be easily machined into mechanical testing specimens for mechanical property measurement and other studies. 展开更多
关键词 ultrafine grain thermomechanical simulator multi-axis restraint compression
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基于NCSIMUL四轴数控机床辊轴的仿真分析
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作者 余雁波 鲍磊 《机电产品开发与创新》 2024年第5期131-133,共3页
随着数控技术的不断发展,NCSIMUL等先进的数控模拟软件在制造业中的应用越来越广泛。本文旨在探讨基于NCSIMUL的四轴数控机床辊轴的模拟加工技术,以提高加工效率、优化工艺流程,并实现对辊轴制造的高精度控制。通过详细的模拟加工实例,... 随着数控技术的不断发展,NCSIMUL等先进的数控模拟软件在制造业中的应用越来越广泛。本文旨在探讨基于NCSIMUL的四轴数控机床辊轴的模拟加工技术,以提高加工效率、优化工艺流程,并实现对辊轴制造的高精度控制。通过详细的模拟加工实例,本文将深入分析NCSIMUL在四轴数控机床上的应用,突显NCSIMUL模拟仿真在制造中的重要性和潜在优势。 展开更多
关键词 仿真 碰撞 检测 数控多轴加工
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A computational platform for considering the effects of aerodynamic and seismic load combination for utility scale horizontal axis wind turbines 被引量:12
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作者 Mohammad-Amin Asareh Ian Prowell +1 位作者 Jeffery Volz William Schonberg 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2016年第1期91-102,共12页
The wide deployment of wind turbines in locations with high seismic hazard has led engineers to take into account a more comprehensive seismic design of such structures. Turbine specific guidelines usually use simplif... The wide deployment of wind turbines in locations with high seismic hazard has led engineers to take into account a more comprehensive seismic design of such structures. Turbine specific guidelines usually use simplified methods and consider many assumptions to combine seismic demand with the other operational loads effecting the design of these structures. As the turbines increase in size and capacity, the interaction between seismic loads and aerodynamic loads becomes even more important. In response to the need for a computational tool that can perform coupled simulations of wind and seismic loads, a seismic module is developed for the FAST code and described in this research. This platform allows engineers working in this industry to directly consider interaction between seismic and other environmental loads for turbines. This paper details the practical application and theory of this platform and provides examples for the use of different capabilities. The platform is then used to show the suitable earthquake and operational load combination with the implicit consideration of aerodynamic damping by estimating appropriate load factors. 展开更多
关键词 renewable energy horizontal axis wind turbines aerodynamic-seismic load interaction aerodynamicdamping coupled simulations
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Numerical Investigation of Flow Motion and Performance of A Horizontal Axis Tidal Turbine Subjected to A Steady Current 被引量:8
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作者 李林娟 郑金海 +2 位作者 彭于轩 张继生 吴修广 《China Ocean Engineering》 SCIE EI CSCD 2015年第2期209-222,共14页
Horizontal axis tidal turbines have attracted more and more attentions nowadays, because of their convenience and low expense in construction and high efficiency in extracting tidal energy. The present study numerical... Horizontal axis tidal turbines have attracted more and more attentions nowadays, because of their convenience and low expense in construction and high efficiency in extracting tidal energy. The present study numerically investigates the flow motion and performance of a horizontal axis tidal turbine with a supporting vertical cylinder under steady current. In the numerical model, the continuous equation and incompressible Reynolds-averaged Navier-Stokes equations are solved, and the volume of fluid method is employed to track free surface motion. The RNG k-ε model is adopted to calculate turbulence transport while the fractional area/volume obstacle representation method is used to describe turbine characteristics and movement. The effects of installation elevation of tidal turbine and inlet velocity on the water elevation, and current velocity, rotating speed and resultant force on turbine are discussed. Based on the comparison of the numerical results, a better understanding of flow structure around horizontal axis tidal turbine and turbine performance is achieved. 展开更多
关键词 horizontal axis tidal turbine numerical simulation turbine performance flow motion steady current marine renewable energy
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Research on Pitch Control Strategies of Horizontal Axis Tidal Current Turbine 被引量:3
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作者 WANG Bing-zhen HU Teng-yan +1 位作者 GUO Yi ZHANG Yuan-fei 《China Ocean Engineering》 SCIE EI CSCD 2020年第2期223-231,共9页
Based on blade element momentum theory and generator characteristic test,a dynamic simulation model of 150 kW horizontal-axis tidal current turbine was established.The matching of the dynamic characteristics between t... Based on blade element momentum theory and generator characteristic test,a dynamic simulation model of 150 kW horizontal-axis tidal current turbine was established.The matching of the dynamic characteristics between the turbine and generator under various current velocities is studied,and the influence of the pitch angle on the matching is analyzed.For the problem of maximum power output in case of low current speed and limiting power in high current speed,the relation between optimal pitch angle and output power is analyzed.On the basis of dynamic characteristic analysis,the variable pitch control strategy is developed.The performance of the turbine under various tidal conditions is simulated.The research results show that the designed controller enables the turbine to operate efficiently under the condition of low current speed,and achieve the goal of limited power at high current speed. 展开更多
关键词 tidal energy horizontal axis tidal current turbine(HATT) pitch control simulation
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Numerical and Experimental Study of the 3D Effect on Connecting Arm of Vertical Axis Tidal Current Turbine 被引量:2
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作者 郭伟 康海贵 +2 位作者 陈兵 谢宇 王胤 《China Ocean Engineering》 SCIE EI CSCD 2016年第1期83-96,共14页
Vertical axis tidal current turbine is a promising device to extract energy from ocean current. One of the important components of the turbine is the connecting arm, which can bring about a significant effect on the p... Vertical axis tidal current turbine is a promising device to extract energy from ocean current. One of the important components of the turbine is the connecting arm, which can bring about a significant effect on the pressure distribution along the span of the turbine blade, herein we call it 3D effect. However, so far the effect is rarely reported in the research, moreover, in numerical simulation. In the present study, a 3D numerical model of the turbine with the connecting arm was developed by using FLUENT software compiling the UDF(User Defined Function) command. The simulation results show that the pressure distribution along the span of blade with the connecting arm model is significantly different from those without the connecting arm. To facilitate the validation of numerical model, the laboratory experiment has been carried out by using three different types of NACA aerofoil connecting arm and circle section connecting arm. And results show that the turbine with NACA0012 connecting arm has the best start-up performance which is 0.346 m/s and the peak point of power conversion coefficient is around 0.33. A further study has been performed and a conclusion is drawn that the aerofoil and thickness of connecting arm are the most important factors on the power conversion coefficient of the vertical axis tidal current turbine. 展开更多
关键词 connecting arm vertical axis tidal current turbine laboratory experimental study 3D numerical simulation UDF
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Effect of blade pitch angle on aerodynamic performance of straight-bladed vertical axis wind turbine 被引量:3
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作者 张立勋 梁迎彬 +1 位作者 刘小红 郭健 《Journal of Central South University》 SCIE EI CAS 2014年第4期1417-1427,共11页
Wind energy is one of the most promising renewable energy sources, straight-bladed vertical axis wind turbine(S-VAWT) appears to be particularly promising for the shortage of fossil fuel reserves owing to its distinct... Wind energy is one of the most promising renewable energy sources, straight-bladed vertical axis wind turbine(S-VAWT) appears to be particularly promising for the shortage of fossil fuel reserves owing to its distinct advantages, but suffers from poor self-starting and low power coefficient. Variable-pitch method was recognized as an attractive solution to performance improvement, thus majority efforts had been devoted into blade pitch angle effect on aerodynamic performance. Taken into account the local flow field of S-VAWT, mathematical model was built to analyze the relationship between power outputs and pitch angle. Numerical simulations on static and dynamic performances of blade were carried out and optimized pitch angle along the rotor were presented. Comparative analyses of fixed pitch and variable-pitch S-VAWT were conducted, and a considerable improvement of the performance was obtained by the optimized blade pitch angle, in particular, a relative increase of the power coefficient by more than 19.3%. It is further demonstrated that the self-starting is greatly improved with the optimized blade pitch angle. 展开更多
关键词 straight-bladed vertical axis wind turbine pitch angle numerical simulation self-starting power coefficient
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Design and dynamic analysis of single-axis integrated inertia measurement device 被引量:2
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作者 Ma Zongmin Shi Yunbo +1 位作者 Meng Meiyu Liu Jun 《仪器仪表学报》 EI CAS CSCD 北大核心 2007年第9期1558-1563,共6页
The structure and measurement theory of a single-axis integrated inertia measurement device are discussed in this paper.The acceleration and angle velocity can be detected by the proposed sensor at the same time.The k... The structure and measurement theory of a single-axis integrated inertia measurement device are discussed in this paper.The acceleration and angle velocity can be detected by the proposed sensor at the same time.The ki- netic model of the device is also established.In addition,the signal generation of the single-axis integrated inertia measurement device is analyzed and simulated.The results of the model are consistent with simulation result. 展开更多
关键词 设计 动力学模型 单轴整合 惯性测量仪器 仿真分析
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Roadside Vertical Axis Wind Turbine (VAWT): An Effective Evolutionary Design for Australian Highway Commuters with Minimum Dynamic Stall
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作者 Assies Ahmad Adil Loya +3 位作者 Muhammad Ali Ammar Iqbal Faiq Masood Baig Abdul Manan Afzal 《Engineering(科研)》 2020年第9期601-616,共16页
<p align="justify"> <span style="font-family:Verdana;">There are multiple approaches of design for Vertical Axis Wind Turbines (VAWT) that have been studied by engineers and leaps have ... <p align="justify"> <span style="font-family:Verdana;">There are multiple approaches of design for Vertical Axis Wind Turbines (VAWT) that have been studied by engineers and leaps have been made in high performing innovations. By harnessing the energy from these wind turbines, the problem of roadside lights shortage can be solved. This can help </span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">to </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">prevent the accidents while providing clean energy. The importance of coastal areas like Australian beaches regarding wind turbines cannot be neglected as a higher number of people like to live near coastal vicinity. Also, most of the freeways in Australia expand across the sea. In this paper, one such design has been analyzed to implement across the highways. But still with many advancements in technology, an immense gap is present in the research of implementation of VAWTs. The design discussed in the current study is a VAWT which can be installed on the side of the highway roads to provide clean and cheap energy for illuminating the roads. Computational Fluid Dynamics (CFD) was conducted on the blades of the turbine to analyze its performance under operating conditions. Furthermore, the paper elaborates the generation of drag and lift on the blades of the turbine. A wind speed of 60 km/h just produced 6.1 N force on the turbine blades as a result of drag. The cost analysis showed the cheap production of such mechanism that can provide longer service when installed.</span></span></span> </p> 展开更多
关键词 AERODYNAMICS Computational Fluid Dynamics Vertical axis Wind Turbine Finite Elemental Analysis simulations
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Numerical simulation of flow field of single-hole oxygen lance jet
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作者 LIU Kun HAN Ren-zhi BAO Li-ming 《Journal of Energy and Power Engineering》 2007年第1期22-28,共7页
The numerical simulation of jet flow field in Laval tube was carried out first by commercial software CFX4.4, and it is used to determine inlet pressure condition out of nozzle in order to its numerical simulation. Th... The numerical simulation of jet flow field in Laval tube was carried out first by commercial software CFX4.4, and it is used to determine inlet pressure condition out of nozzle in order to its numerical simulation. The decay rule of jet middle line velocity of axial symmetry turbulence jet and cross section's expand situation out of the tube in different stagnation pressure and surrounding temperature were analyzed systematically. The result showed that K-e model is suitable for numerical simulation. The conclusion will have important guide and referent function to research of two important craft parameters, impact depth and the impact area which are related to steel-making production practice. 展开更多
关键词 Laval tube axis symmetry turbulence jet simulation
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The Impact Study of Three-axis Servo System Interference Torque based on Virtual Prototype
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作者 YIN Jian WU Jian-dong +1 位作者 YU Jin-jiang HU Liang 《International Journal of Plant Engineering and Management》 2016年第4期217-230,共14页
The three-axis servo system with the core of gyro stabilization is the foundation to realize its function, and a key technology of the seeker devolopment. In order to reduce the costs, improve the efficiency of resear... The three-axis servo system with the core of gyro stabilization is the foundation to realize its function, and a key technology of the seeker devolopment. In order to reduce the costs, improve the efficiency of research and devolopment, a new method that instead of physical prototype by virtual prototype was proposed. Adams and MATLAB/simulink are used to establish the mechanical dynamics model and controller model of the three-axis servo system. The simulation data which was processed and analyzed is compared with test data, to determine the control parameters of the virtual prototype and improve the accuracy of the model, and test the multiple condition simulation,which can provide a reference for practical production.The simulation results verify the feasibility of the models. 展开更多
关键词 three-axis servo system virtual prototype co-simulation of Adams and simulink mass unbalancetorque
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B-Spline曲线聚风装置直线翼垂直轴风力机启动性能数值模拟 被引量:1
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作者 李岩 马云飞 +2 位作者 佟国强 杨胜兵 肖振军 《排灌机械工程学报》 CSCD 北大核心 2024年第3期265-272,共8页
为了提升直线翼垂直轴风力机的启动性能,基于B-Spline曲线生成方法,提出一种具有流线型轮廓的聚风装置,将其分别安装在风轮顶端和底端,用以提升风轮附近的来流风速,使风轮汲取更多风能,达到更易启动的特点.选取聚风装置的5个结构参数进... 为了提升直线翼垂直轴风力机的启动性能,基于B-Spline曲线生成方法,提出一种具有流线型轮廓的聚风装置,将其分别安装在风轮顶端和底端,用以提升风轮附近的来流风速,使风轮汲取更多风能,达到更易启动的特点.选取聚风装置的5个结构参数进行设计:聚风装置与风轮间隙距离ΔL、底圆半径R_(1)、顶圆半径R_(2)、入口角度α_(1)和出口角度α_(2).设计方法采用二次旋转正交组合筛选最优模型,通过三维数值模拟研究聚风装置参数对直线翼垂直轴风力机启动性能的影响,获得了最佳外形参数组合.此外,对有无加装聚风装置的直线翼垂直轴风力机进行了静态三维数值模拟.结果表明,通过添加具有外凸流线型轮廓的聚风装置,直线翼垂直轴风力机的启动性能有显著提升.在风速较低的情况下,性能改善更加明显.聚风装置可使直线翼垂直轴风力机的平均启动力矩系数最大增加38.8%,峰值平均启动力矩系数最大可增加31.2%. 展开更多
关键词 垂直轴风力机 聚风装置 B-Spline曲线 启动性能 数值模拟
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IDDES方法模拟风切变下大型水平轴风力机流场特性 被引量:1
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作者 杨从新 张宇婷 岳念西 《西华大学学报(自然科学版)》 2024年第1期78-86,共9页
为研究风切变条件下大型水平轴风力机流场特性,以NH 1500 kW大型水平轴风力机为研究对象,运用计算流体力学中模拟流场精度较高的IDDES(改进延迟分离涡)方法,分析流场内瞬时速度分量、脉动速度和风力机输出功率。结果表明:风轮平面周围... 为研究风切变条件下大型水平轴风力机流场特性,以NH 1500 kW大型水平轴风力机为研究对象,运用计算流体力学中模拟流场精度较高的IDDES(改进延迟分离涡)方法,分析流场内瞬时速度分量、脉动速度和风力机输出功率。结果表明:风轮平面周围流场速度波动大,轴向速度在风轮旋转边界以外的区域会增大,在旋转边界以内的区域会亏损;脉动风速频谱特性在低频区与风轮转频的整数倍相关,风力机功率呈余弦形式输出并满足湍流谱特性。 展开更多
关键词 水平轴风力机 数值模拟 IDDES方法 流场特性
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