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Development of Mathematical Model of Slag Flow Field and Temperature Field in ESR System 被引量:1
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作者 YANG Yin-dong SOMMERVILLE I D +1 位作者 JOHNSTON R F McLEAN A 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2000年第2期27-31,共5页
The heat transfer phenomena and driving forces of slag bath flow in ESR process were analyzed, and the mathematical models in ESR system were reviewed and evaluated. The electromagnetic force is the main driving force... The heat transfer phenomena and driving forces of slag bath flow in ESR process were analyzed, and the mathematical models in ESR system were reviewed and evaluated. The electromagnetic force is the main driving force for the flow formation in the ESR slag pool, and the temperature difference in the pool creates a convective flow in the system. The shape of the electrode tip has an effect on electromagnetic field distribution in slag pool, thus affects the flow pattern. Finally an improved mathematical model of slag pool flow was proposed. 展开更多
关键词 ESR electromagnetic force buoyancy force flow field temperature field mathematical model
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RELATED CALCULATION OF THE TEMPERATURE FIELD AND THE BENTONITE BURN OUT FIELD IN GREEN SAND MOULD
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作者 赵涛 《Transactions of Tianjin University》 EI CAS 1996年第2期84+80-83,共5页
Through laboratory tests and theoretical analysis a mathematical model of bentonite burn out in the poured mould has been established, and it has been found that the bentonite burn out ra... Through laboratory tests and theoretical analysis a mathematical model of bentonite burn out in the poured mould has been established, and it has been found that the bentonite burn out rate is an exponential function of heating temperature and time of the mould. Related to the temperature field the bentonite burn out field in the poured mould has been simulated numerically, which can be used for determining the bentonite burn out of moulding sand. 展开更多
关键词 mathematical model temperature field bentonite burn out field numerical simulation
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Mathematical modeling of flow field in slab continuous casting mold considering mold powder and solidified shell with high temperature quantitative measurement 被引量:1
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作者 Yi-bo Liu Jian Yang +4 位作者 Chao Ma Tao Zhang Fu-bin Gao Tai-quan Li Jun-li Chen 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2022年第3期445-461,共17页
Optimization of mathematical model of flow field in slab continuous casting mold was performed by means of industrial measurement and mathematical modeling.The rod deflection method was used to quantitatively measure ... Optimization of mathematical model of flow field in slab continuous casting mold was performed by means of industrial measurement and mathematical modeling.The rod deflection method was used to quantitatively measure the velocities near the mold surface at high temperature.The measurement results were compared with the simulation results of three mathematical models at different argon gas flow rates of 6,10 and 14 L min^(−1).The model 1 neglects the mold powder layer,thermal effect and solidified shell.The model 2 only considers the influence of mold powder layer.The model 3 considers the influence of mold powder layer,thermal effect and solidified shell on the flow field.In all three models,the diameter of argon bubbles obeys Rosin-Rammler distribution fitted according to the experimental data of others’previous work.With increasing the argon gas flow rate,the velocity of liquid steel near the mold surface decreases.The model 1 seriously underestimates the shear stress of liquid steel near the mold surface,and its calculation results show higher velocity near the mold surface,lower turbulent kinetic energy and wider distribution of argon gas bubbles in the mold.The simulation results of model 2 only considering the viscous resistance of the mold powder layer to liquid steel makes the velocity near the surface lower than the measurement results obviously.The calculated velocities near the mold surface with model 3 are in best agreement with the measured results,showing the reasonable spatial distribution range of argon bubbles in the mold and the moderate turbulent kinetic energy.In the present conditions,the best argon gas flow rate is 10 L min^(−1) due to the moderate velocity near the mold surface,the appropriate distribution of argon gas bubbles in the mold and the smallest fluctuation amplitude on the mold surface. 展开更多
关键词 flow field Mold powder layer Solidified shell Rosin-Rammler distribution mathematical modeling Rod deflection method
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Flow field simulation and establishment for mathematical models of flow area of spool valve with sloping U-shape notch machined by different methods 被引量:10
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作者 王兆强 顾临怡 +2 位作者 冀宏 陈家旺 李林 《Journal of Central South University》 SCIE EI CAS 2014年第1期140-150,共11页
Precise function expression of the flow area for the sloping U-shape notch orifice versus the spool stroke was derived. The computational fluid dynamics was used to analyze the flow features of the sloping U-shape not... Precise function expression of the flow area for the sloping U-shape notch orifice versus the spool stroke was derived. The computational fluid dynamics was used to analyze the flow features of the sloping U-shape notch on the spool, such as mass flow rates, flow coefficients, effiux angles and steady state flow forces under different operating conditions. At last, the reliability of the mathematical model of the flow area for the sloping U-shape notch orifice on the spool was demonstrated by the comparison between the orifice area curve derived and the corresponding experimental data provided by the test. It is presented that the bottom arc of sloping U-shape notch (ABU) should not be omitted when it is required to accurately calculate the orifice area of ABU. Although the theoretical flow area of plain bottom sloping U-shape notch (PBU) is larger than that of ABU at the same opening, the simulated mass flow and experimental flow area of ABU are both larger than these of PBU at the same opening, while the simulated flow force of PBU is larger than that of ABU at the same opening. Therefore, it should be prior to adapt the ABU when designing the spool with proportional character. 展开更多
关键词 spool valve flow field simulation flow area steady state flow force mathematical model sloping U-shape notch
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Mathematical Model for Temperature Field of Strip Coil in Cooling and Heating Process 被引量:5
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作者 SUNJi-quan SUNJing-hong +1 位作者 WUBin LIANJia-chuang 《Journal of Iron and Steel Research International》 SCIE CAS CSCD 2005年第2期33-36,44,共5页
The convection between the strip coil boundary and the surrounding medium was studied, and the mathematical model and boundary conditions for the temperature field of anisotropic strip coil was proposed, and the tempe... The convection between the strip coil boundary and the surrounding medium was studied, and the mathematical model and boundary conditions for the temperature field of anisotropic strip coil was proposed, and the temperature field of strip coil were calculated by the analytic method. 展开更多
关键词 strip coil ANISOTROPY temperature field mathematical model
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Mathematical Modeling,Field Calibration and Numerical Simulation of Low-Speed Mixed Traffic Flow in Cities 被引量:1
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作者 Doctoral Candidate: Feng SuweiAdvisor: Prof. Dai Shiqiang 《Advances in Manufacturing》 SCIE CAS 1998年第2期86-88,共3页
Withtherapiddevelopmentoftransportationandautomobileindustry,theconflictbetweenmotormanufactureandhighwaycon... Withtherapiddevelopmentoftransportationandautomobileindustry,theconflictbetweenmotormanufactureandhighwayconstructionbecomess... 展开更多
关键词 low speed mixed traffic flow in cities mathematical modeling numerical simulation field calibration vehicular parking traffic light control
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Flow Field and Temperature Field in GaN-MOCVD Reactor Based on Computational Fluid Dynamics Modeling 被引量:1
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作者 梅书哲 王权 +8 位作者 郝美兰 徐健凯 肖红领 冯春 姜丽娟 王晓亮 刘峰奇 徐现刚 王占国 《Chinese Physics Letters》 SCIE CAS CSCD 2018年第9期82-86,共5页
Metal organic chenlical vapor deposition (AIOCVD) growth systems arc one of the. main types of equipment used for growing single crystal materials, such as GaN. To obtain fihn epitaxial materials with uniform perfor... Metal organic chenlical vapor deposition (AIOCVD) growth systems arc one of the. main types of equipment used for growing single crystal materials, such as GaN. To obtain fihn epitaxial materials with uniform performanee, the flow field and ternperature field in a GaN-MOCVD reactor are investigated by modeling and simulating. To make the simulation results more consistent with the actual situation, the gases in the reactor are considered to be compressible, making it possible to investigate the distributions of gas density and pressure in the reactor. The computational fluid dynamics method is used to stud,v the effects of inlet gas flow velocity, pressure in the reactor, rotational speed of graphite susceptor, and gases used in the growth, which has great guiding~ significance for the growth of GaN fihn materials. 展开更多
关键词 MOCVD flow field and temperature field in GaN-MOCVD Reactor Based on Computational Fluid Dynamics modeling GAN
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A Computer-aided Design System for Framed-mould in Autoclave Processing 被引量:1
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作者 Tian-Guo Jin Feng-Yang Bi 《International Journal of Automation and computing》 EI 2010年第3期261-270,共10页
The general computer-aided design (CAD) software cannot meet the mould design requirement of the autoclave process for composites, because many parameters such as temperature and pressure should be considered in the... The general computer-aided design (CAD) software cannot meet the mould design requirement of the autoclave process for composites, because many parameters such as temperature and pressure should be considered in the mould design process, in addition to the material and geometry of the part. A framed-mould computer-aided design system (FMCAD) used in the autoclave moulding process is proposed in this paper. A function model of the software is presented, in which influence factors such as part structure, mould structure, and process parameters are considered; a design model of the software is established using object oriented (O-O) technology to integrate the stiffness calculation, temperature field calculation, and deformation field calculation of mould in the design, and in the design model, a hybrid model of mould based on calculation feature and form feature is presented to support those calculations. A prototype system is developed, in which a mould design process wizard is built to integrate the input information, calculation, analysis, data storage, display, and design results of mould design. Finally, three design examples are used to verify the prototype. 展开更多
关键词 Framed-mould autoclave processing computer-aided design (CAD) temperature field analyzing hybrid model.
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Flow and Temperature Fields in Slab Continuous Casting Molds 被引量:1
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作者 Yin Zhang Liguo Cao +2 位作者 Youduo He Shiqi Li Yishen Shen(Institute of Metallurgical Engineering, Baotou University of Iron & Steel Technology Baotou 014010, China)(Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China) 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2000年第2期103-106,共4页
In order to develop super-board and super-thick slabs, the flow and temperatur fields were studied in slab continuous casting molds under different practical conditions, such as slab dimensions, with-drawing slab spee... In order to develop super-board and super-thick slabs, the flow and temperatur fields were studied in slab continuous casting molds under different practical conditions, such as slab dimensions, with-drawing slab speed, design of nozzles, and superheat tempera-ture. The results showed that it is preferred to incline nozzle bores downwards and the submerged depth of the nozzles is best kept be-tween 250-300 mm. In addition, the solidified shell is thicker at the wide face than that at the narrow face, while the thin points alongthe wide face ekist both in the center and in the some area toward each respective end. 展开更多
关键词 slab continuous casting mold flow field temperature field mathematical model
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NUMERICAL SIMULATIONS OF TEMPERATURE FIELD IN DIRECT METAL LASER SINTERING PROCESS 被引量:6
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作者 顾冬冬 沈以赴 +2 位作者 刘满仓 潘琰峰 胥橙庭 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2004年第3期225-233,共9页
A mathematical model is developed for simulating the heat transferring behavior in a direct metal laser sintering process. The model considers the thermal phenomena involved in the process, including conduction, radia... A mathematical model is developed for simulating the heat transferring behavior in a direct metal laser sintering process. The model considers the thermal phenomena involved in the process, including conduction, radiation, and convection. A formula for the calculation of the heat conductivity of a sintering system containing solid phase, liquid phase, and gas phase is given. Due to the continuous movement of the laser beam, a local coordinate system centered on the laser beam is used to simplify the analytical calculation. Assuming that it is approximately a Gaussian laser beam, the heat conduction equation is resolved based on the assumption of the thermal insulating boundary conditions and the fixed thermal physical parameters. The FORTRAN language is employed to compile the program to simulate the temperature field in the direct copper powder sintering process. It shows a good agreement with the preliminary experimental results.[KH3/4D] 展开更多
关键词 direct metal laser sintering (DMLS) mathematical model temperature field numerical simulation
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Mathematical Modeling of ESR Process for Hollow Ingot with Current Supplying Mould 被引量:2
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作者 Xu CHEN Fu-bin LIU +3 位作者 Zhou-hua JIANG Hua-bing LI Xi-min ZANG Xin DENG 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2015年第3期192-199,共8页
With ificreasing demand for large cylindrical forgings, a new technology--electroslag remelting (ESR) for direct manufacture of hollow ingots rather than solid ingots has been developed. The main features of the pro... With ificreasing demand for large cylindrical forgings, a new technology--electroslag remelting (ESR) for direct manufacture of hollow ingots rather than solid ingots has been developed. The main features of the process include a T-shaped current supplying mould (CSM), double power supply, an ingot withdrawing system, a metal level automatic control system based on a level sensor using the electromagnetic eddy current method, and the exchange of a consumable multi-electrode. ANSYS software was used to calculate the fluid flow and heat transfer in the slag bath 1 and metal pool of this ESR hollow ingot process with its T-shaped CSM. The mathematmal model was Verified by measuring the geometry of the liquid metal pool as observed in the macrostructure of 4650 mm (external diameter)/ 4450 mm (internal diameter) hollow ingots by sulphur print method: the. observed shape and depth of the s!ag bath were consistent with the simulated results. Simulation of the ESR process can improve understanding of the process and allow better operating parameters to be selected. 展开更多
关键词 electroslag remelting hollow ingot T-shaped current supplying mould temperature field magnetically driven fluid flow finite element method
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MATHEMATICAL MODELLING OF FLOW PHENOMENA IN METAL BATH COVERED WITH MOLTEN SLAG
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作者 QU Ying YANG Jian XU Baomei University of Science and Technology Beijing,Beijing,China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1990年第12期370-376,共7页
By use of the two-component LDA and high speed camera,the water model of the flow field in metal bath under molten slag layer has been tested.On the basis of experimental results,the flow boundary conditions of liquid... By use of the two-component LDA and high speed camera,the water model of the flow field in metal bath under molten slag layer has been tested.On the basis of experimental results,the flow boundary conditions of liquid metal at the slag-metal interface of a gas injecting bath were deduced.The flow field and the turbulent parameters of the metal bath covered with slag were solved by the vorticity-stream function method.The results reveal that the flow velocity, turbulent energy and circulating rate of the melt under slag are lower than that of without slagcover.Another one “dead zone” of the lowest turbulent energy is formed in the top layer under cover of slag near the ladle linning. 展开更多
关键词 flow field metal bath injection metallurgy mathematical modelling
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Study on application and numerical simulation of the airflow temperature distribution rule in drifting tunnel
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作者 李孝东 卢国斌 +1 位作者 张浪 周西华 《Journal of Coal Science & Engineering(China)》 2003年第1期90-94,共5页
According to the law of conservation in the state of turbulent flow, the differential equation describing the airflow temperature distribution in drifting tunnel is derived, By theoretical analysis and field measureme... According to the law of conservation in the state of turbulent flow, the differential equation describing the airflow temperature distribution in drifting tunnel is derived, By theoretical analysis and field measurement of the airflow and thermal process in mine, theoretical analysis and systematic flow are developed. By PHONENICS program, the numerical simulation is processed, and the changing rule of airflow temperature with various parameters in drifting tunnel is derived. The airflow temperature in drifting tunnel decreases as the airflow velocity increases in a way of negative power exponent, and elevates linearly as the temperature of the incoming airflow elevates. 展开更多
关键词 turbulent model porosity factor airflow flow field temperature field
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Fluid Flow and Solidification Simulation in Beam Blank Continuous Casting Process With 3D Coupled Model 被引量:14
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作者 YANG Jian-wei DU Yan-ping +1 位作者 SHI Rong CUI Xiao-chao 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2006年第4期17-21,共5页
Based on turbulent theory, a 3D coupled model of fluid flow and solidification was built using finite difference method and used to study the influence of superheating degree and casting speed on fluid flow and solidi... Based on turbulent theory, a 3D coupled model of fluid flow and solidification was built using finite difference method and used to study the influence of superheating degree and casting speed on fluid flow and solidification, analyze the interaction between shell and molten steel, and compare the temperature distribution under different technological conditions. The results indicate that high superheating degree can lengthen the liquid-core depth and make the crack and breakout possible, so suitable superheating should be controlled within 35℃ according to the simulation results. Casting speed which is one of the most important technological parameters of improving production rate, should be controlled between 0. 85 m/min and 1.05 m/min and the caster has great potential in the improvement of blank quality. 展开更多
关键词 beam blank continuous casting flow field temperature distribution coupled model SOLIDIFICATION
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Mathematical models and expert system for grate-kiln process of iron ore oxide pellet production.Part Ⅱ:Rotary kiln process control 被引量:7
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作者 范晓慧 王祎 陈许玲 《Journal of Central South University》 SCIE EI CAS 2012年第6期1724-1727,共4页
Rotary kiln process for iron ore oxide pellet production is hard to detect and control.Construction of one-dimensional model of temperature field in rotary kiln was described.And the results lay a solid foundation for... Rotary kiln process for iron ore oxide pellet production is hard to detect and control.Construction of one-dimensional model of temperature field in rotary kiln was described.And the results lay a solid foundation for online control.Establishment of kiln process control expert system was presented,with maximum temperature of pellet and gas temperature at the feed end as control cores,and interval estimate as control strategy.Software was developed and put into application in a pellet plant.The results show that control guidance of this system is accurate and effective.After production application for nearly one year,the compressive strength and first grade rate of pellet are increased by 86 N and 2.54%,respectively,while FeO content is 0.05% lowered.This system can reveal detailed information of real time kiln process,and provide a powerful tool for online control of pellet production. 展开更多
关键词 mathematical model expert system one-dimensional temperature field rotary kiln iron ore oxide pellet
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Foundation of three—dimensional mathematical models for glass furnace regenerator 被引量:1
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作者 沈锦林 宋晨路 《Journal of Zhejiang University Science》 CSCD 2002年第5期570-573,共4页
This paper presents a practical three dimensional mathematical model of circulation and heat transfer in generator of glass melting furnaces. The model was based on the heat transfer between the smoke flow and the la... This paper presents a practical three dimensional mathematical model of circulation and heat transfer in generator of glass melting furnaces. The model was based on the heat transfer between the smoke flow and the lattice units, and between the air flow and the lattice units. This model not only bypassed the difficulty of complicated computation of the heat transfer process in the regenerator of glass furnaces, but also avoided the irrationality of fixing the temperature distribution on the surfaces. Use of the model yielded very important data and also the method for the design of the regenerator of glass furnaces in practical production. 展开更多
关键词 REGENERATOR mathematical model Gas flow temperature field
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Coupled Modeling of Electromagnetic Fleld,Fluid Flow,Heat Transfer and Solidification During Conventional DC Casting and Low Ftequency Electrmagnetic Casting of 7xxx Aluminum Alloys
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作者 Nagaum Hiromi 《特种铸造及有色合金》 CAS CSCD 北大核心 2008年第S1期485-490,共6页
A comprehensive mathematical model has been developed to describe the interaction of the multiple physics fields during the conventional DC casting and LFEC (low frequency electromagnetic casting) process. The model i... A comprehensive mathematical model has been developed to describe the interaction of the multiple physics fields during the conventional DC casting and LFEC (low frequency electromagnetic casting) process. The model is based on a combination of the commercial finite element package ANSYS and the commercial finite volume package FLUENT, with the former for the calculation of the electromagnetic field and the latter for the calculation of the magnetic driven fluid flow, heat transfer and solidification. Moreover, the model has been verified against the temperature measurements obtained from two 7XXX aluminum alloy billets of 200mm diameter, cast during the conventional DC casting and the LFEC casting processes. In addition, a measurement of the sump shape of the billets were carried out by using addition melting metal of Al-30%Cu alloy into the billets during casting process. There was a good agreement between the calculated results and the measured results. Further, comparison of the calculated results during the LFEC process with that during the conventional DC casting process indicated that velocity patterns, temperature profiles and the sump depth are strongly modified by the application of a low frequency electromagnetic field during the DC casting. 展开更多
关键词 low frequency electromagnetic casting DC casting coupled modeling temperature field fluid flow solidification.
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寒冷地区装配式日光温室保温性能仿真 被引量:1
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作者 吴菲菲 吕彩霞 《计算机仿真》 2024年第8期526-529,566,共5页
日光温室的保温性能直接影响农作物产量,为了使其提高产量,需要对保温性能进行分析。但由于需要考虑诸多因素,导致分析过程繁复。因此,提出寒冷地区装配式日光温室保温性能仿真研究,利用数学模型化繁为简。计算温室前段与后段曲率,并构... 日光温室的保温性能直接影响农作物产量,为了使其提高产量,需要对保温性能进行分析。但由于需要考虑诸多因素,导致分析过程繁复。因此,提出寒冷地区装配式日光温室保温性能仿真研究,利用数学模型化繁为简。计算温室前段与后段曲率,并构建温度场数学模型,使用二次曲线逼近的方式解析该模型;建立有限元分析模型,根据有限元求解思路计算热传递问题,分别确立稳态和瞬态下的热传递微分方程,设置边界条件;结合热传递情况,使用流体动力学算法,计算流体质量、动量和能量守恒公式,进而获得温室不同节点温度。实验结果表明,目标温室的保温性能良好,模拟出的温度与实际温度相符,能够为温室参数改进提供参考依据。 展开更多
关键词 寒冷地区 装配式日光温室 保温性能 有限元分析 温度场数学模型
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涡轮动力模拟器甩油盘热流模型与流场特性研究
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作者 吴福章 段雪峰 +2 位作者 刘砚 黎旭康 张国渊 《机电工程》 CAS 北大核心 2024年第7期1285-1292,1308,共9页
甩油盘作为涡轮动力模拟器(TPS)的重要零件,能有效地促进模拟器内循环系统润滑油的回流,提高轴承的润滑性并降低系统温升,为整机安全可靠运行提供了基础性保障。为了解决TPS内循环系统润滑油的回流问题,对TPS甩油盘及其内部循环流道进... 甩油盘作为涡轮动力模拟器(TPS)的重要零件,能有效地促进模拟器内循环系统润滑油的回流,提高轴承的润滑性并降低系统温升,为整机安全可靠运行提供了基础性保障。为了解决TPS内循环系统润滑油的回流问题,对TPS甩油盘及其内部循环流道进行了研究。首先,确定了涡轮动力模拟器轴承发热量及散热系数随转速的变化、甩油盘内部流体控制方程和边界条件;然后,构建了一类TPS甩油盘及其内部循环流道的完整内循环热流模型,并对比了轴承处温度仿真结果与实验结果以确保模型的合理性;最后,数值仿真得到了不同转速下内部循环流道的温度场、压力场和速度场。研究结果表明:转速增加能显著引发系统内最高温度上升,甩油盘作用下的内循环流场温度变化较为平稳,典型工况条件下仿真与实验得到的最高温度相对误差最大为12.3%,表明了热流模型的合理性。研究结果对于指导TPS甩油盘结构设计和提高整机运行安全稳定性具有重要的价值。 展开更多
关键词 涡轮动力模拟器甩油盘 热流模型 流场特性 温度场
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搅拌摩擦焊过程热-力-流全耦合仿真:不同本构方程的仿真效果对比
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作者 刘新 史清宇 +4 位作者 路宝坤 闵爱武 乔俊楠 杨诚乐 陈高强 《电焊机》 2024年第8期20-28,共9页
本构方程是搅拌摩擦焊过程热-力-流全耦合仿真模型的重要部分。针对6 mm铝合金6061-T6板材FSW过程开展热-力-流全耦合仿真分析。为分析本构方程的形式对仿真效果的影响,在模型中分别采用Chen-Liu本构模型、Sellars-Tegart模型和Johnson-... 本构方程是搅拌摩擦焊过程热-力-流全耦合仿真模型的重要部分。针对6 mm铝合金6061-T6板材FSW过程开展热-力-流全耦合仿真分析。为分析本构方程的形式对仿真效果的影响,在模型中分别采用Chen-Liu本构模型、Sellars-Tegart模型和Johnson-Cook模型,并对仿真结果进行对比分析。仿真结果表明,Chen-Liu模型计算得到的FSW温度场及流动场与实验结果的吻合程度均高于Sellars-Tegart模型和Johnson-Cook模型。究其原因,在搅拌头-工件界面附近的温度条件下,Sellars-Tegart模型和Johnson-Cook模型预测的流变应力较高,使得材料流动困难,搅拌头与工件之间的界面状态主要为滑动摩擦。相比之下,Chen-Liu模型能够体现材料在温度升高时的迅速软化现象,在搅拌头-工件界面附近的温度条件下,材料的剪切流变应力低于搅拌头/工件界面的摩擦应力,因而在摩擦作用下工件发生塑性流动,这降低了搅拌头/工件之间的滑动摩擦速度,从而使得滑动摩擦产热减少,且其减少量大于工件发生塑性流动产生的额外热量,从而使得采用Chen-Liu模型预测得到的焊接温度更低。综合来看,FSW过程温度场与材料流动速度场受材料本构模型影响归因于FSW的热-力-流全耦合效应。 展开更多
关键词 搅拌摩擦焊 数值仿真 本构模型 温度场 材料流动
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