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跨音速透平级叶片三元计算体系
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作者 刘凤君 顾发华 杨弘 《汽轮机技术》 北大核心 1994年第3期151-157,共7页
以S_2流面正问题计算程序为上,以S1流面计算程序、全三元欧拉计算程序为辅,建立了适用于跨行速流动的透平叶片三元计算体系。应用该体系对国产大功率汽轮机末级弯扭叶片进行改型设计计算,结果表明,该体系在工程技术上有实用性。
关键词 跨音速流动 透平级 叶片 三元计算
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在并行网络上实现叶轮机械内部流动两类流面准三元迭代并行计算 被引量:3
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作者 赵晓路 秦立森 《工程热物理学报》 EI CAS CSCD 北大核心 1998年第1期28-33,共6页
叶轮机械S1/S2两类流面迭代计算具有天然可并行性,在科学与工程计算国家重点实验室的SGI工作站网络上首次实现了两类流面准三元迭代并行计算.
关键词 三元迭代计算 并行计算 工作站网络 叶轮机械
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三元流动计算在涡轮钻具叶栅设计中的应用 被引量:3
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作者 孟庆昆 谢正凯 +2 位作者 王玉明 马家骥 于炳忠 《石油矿场机械》 1996年第1期22-26,共5页
简要介绍了一种三元流动计算的方法,即流面迭代法,并推导出涡轮钻具叶栅内部流体运动的速度梯度方程和连续性方程,以及问题求解的边界条件。计算结果为涡轮叶栅的设计和修改提供了可靠的依据。
关键词 三元流动计算 流面迭代法 涡轮钻具 涡轮叶栅
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液力变矩器三元流场计算的一种近似方法
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作者 齐学义 翟小兵 张风羽 《水动力学研究与进展(A辑)》 CSCD 北大核心 2004年第1期104-107,共4页
 本文提出了一种在两类相对流面基础上的液力变矩器三元流场计算的近似方法,建立了求解的数学模型并给出了计算方法和步骤。用这一方法计算了YB355 2型液力变矩器三元流场分布,并将计算结果与试验数据进行了比较和分析。计算结果与实...  本文提出了一种在两类相对流面基础上的液力变矩器三元流场计算的近似方法,建立了求解的数学模型并给出了计算方法和步骤。用这一方法计算了YB355 2型液力变矩器三元流场分布,并将计算结果与试验数据进行了比较和分析。计算结果与实际相吻合,能满足一定的精度,该方法在透平机械流场计算中也有较高的应用价值。 展开更多
关键词 液力变矩器 三元流场计算 流动参数 透平机械流场 周向速度 高阶导数
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样条函数在液力变矩器三元流场计算中的应用
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作者 张凤羽 翟小兵 齐学义 《甘肃工业大学学报》 2000年第2期39-44,共6页
针对液力变矩器三元流场的计算 ,采用三次样条插值函数的方法进行了流场内液流速度的计算 ,求出了速度沿流面的变化率 ,并讨论了速度的变化趋势 .计算结果与实际相吻合 ,且精度高 ,可用于透平机械的流场计算 .
关键词 三次样条插值 液力变矩器 三元流场计算
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利用转轮内三元流动计算对泵叶轮进行改型设计
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作者 杨伟华 《天发报导》 1994年第1期11-18,共8页
关键词 转轮 三元流动计算 泵叶轮 设计
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离心泵三元叶轮的优化改型设计
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作者 薛敦松 黄思 《水泵技术》 北大核心 1990年第4期5-9,共5页
关键词 离心泵 三元计算 改型 叶轮 流速场
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人-机-物三元融合将促进信息服务进入普惠计算时代 被引量:5
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作者 房俊民 田倩飞 +2 位作者 徐婧 唐川 洪学海 《中国科学院院刊》 2013年第5期564-566,共3页
1人-机-物三元计算是实现普惠计算的范式变革 过去50年,信息技术的发展主要追求高性能、通用和规模化生产,较忽视低成本、易用性、可靠性、安全性和个性化。未来的信息产品则是要满足数以十亿计的广大民众的个性化需求。
关键词 三元计算 信息服务 个性化需求 规模化生产 信息技术 信息产品 低成本 易用性
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离心泵进口回流的发生机理及预估 被引量:14
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作者 黄建德 《上海交通大学学报》 EI CAS CSCD 北大核心 1998年第7期5-9,共5页
在小流量工况下,水泵进口不可避免会出现回流,从而影响水泵的安全运行.文中利用动态探针对不同叶片进口角、叶片数、闭式和开式不同叶顶间隙共10种不同几何形状的离心泵叶轮的进口叶片间流场分布进行了测试,弄清了叶轮形状对回流... 在小流量工况下,水泵进口不可避免会出现回流,从而影响水泵的安全运行.文中利用动态探针对不同叶片进口角、叶片数、闭式和开式不同叶顶间隙共10种不同几何形状的离心泵叶轮的进口叶片间流场分布进行了测试,弄清了叶轮形状对回流向上游扩散速度的影响.根据实验结果,讨论了回流的发生机理,提出了利用准三元流场计算和前盖板上紊流边界层计算相结合的方法,来预估常规叶片数的闭式叶轮进口回流发生点. 展开更多
关键词 离心泵 进口回流 紊流边界层 三元计算
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面向控域的体系结构:一种智能万物互联的体系结构风格 被引量:6
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作者 徐志伟 曾琛 +1 位作者 朝鲁 彭晓晖 《计算机研究与发展》 EI CSCD 北大核心 2019年第1期90-102,共13页
继PC互联网、移动互联网之后,世界正在进入智能万物互联网时代,也称为人机物三元计算时代.一个主要特征是,"计算机"不只是PC机、智能手机,也会具象成为物理世界中的各种智能物体设备(物端设备).未来的全球智能万物互联网将拥... 继PC互联网、移动互联网之后,世界正在进入智能万物互联网时代,也称为人机物三元计算时代.一个主要特征是,"计算机"不只是PC机、智能手机,也会具象成为物理世界中的各种智能物体设备(物端设备).未来的全球智能万物互联网将拥有万亿级物端设备,它们需要多种多样的控制策略,去满足各自的创新自由度、安全隐私保障、依法依规治理、良好用户体验等方面的需求.一套控制策略难以满足全球智能万物互联网的多样化需求,但可将全网划分成多个域(称为控域),每个有自己的控制范围和控制策略.借鉴面向服务的体系结构(service-oriented architecture,SOA)和REST体系结构风格的经验,提出一种面向控域的体系结构(zone-oriented architecture,ZOA)风格.它的基础技术包括:以控域为元素并含有4个算子的控域代数、3个范式和5个体系结构设计原则.最后讨论了面向控域的体系结构针对的5个问题,并通过一个车联网场景显示了该体系结构风格如何有助于现有研究,提出了开放研究问题. 展开更多
关键词 控域 架构风格 智能万物互联 人机物三元计算 分布式系统
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国外透平压缩机研究动向——离心压缩机“数值优化”
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作者 吕文灿 王芝基 《流体机械》 CSCD 北大核心 1995年第7期26-28,共3页
阐述了90年代国外透平压缩机研究新动向,分析了离心压缩机以"数值优化"法取代试验样机的可能性。
关键词 离心压缩机 数值优化 三元计算
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水泵水力模型设计方法综述
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作者 王六玲 李明 《新能源》 1999年第5期31-36,共6页
本文描述了水泵现代设计的技术要求,综述了水泵叶轮内水力模型设计方法。在水泵传统设计方法的基础上引出了组合设计法,并对水泵叶轮内三元流水动力学计算问题的解法做了统一概述。
关键词 水泵 组合法设计 三元计算 水力模型
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Information Service Entering the Era of Computing for the Masses, Driven by Human-cyber-physical Ternary Integration
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《Bulletin of the Chinese Academy of Sciences》 2014年第1期27-29,共3页
1.Human-cyber-physical ternary computing——a paradigm shift to computing for the masses Over the past five decades,the development of information technology(IT)has mainly focused on highperformance,general purpose an... 1.Human-cyber-physical ternary computing——a paradigm shift to computing for the masses Over the past five decades,the development of information technology(IT)has mainly focused on highperformance,general purpose and large-scale production,while affordability,usability,reliability,security and customization have not received enough attention.Future information products and services should meet the personalized demand of billions of individual users[1].This trend is called Computing for the masses(or e-People).Traditional computing is dominated by institutional computing in the cyberspace,providing IT value(IT hardware,software,and services)to companies(e-Business),research institutions(e-Science),and government agencies(e-Government).Computing for the masses is different in two aspects:it provides business value to the 展开更多
关键词 三元计算 计算 信息服务 物理 网络 整合 规模化生产 信息技术
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Calculation of thermodynamic properties in liquid phase for ternary Al-Ni-Zn alloys 被引量:2
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作者 D.ZIVKOVI 杜勇 +2 位作者 N.TALIJAN A.KOSTOV Lj.BALANOVI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第12期3059-3065,共7页
The results of the calculation of thermodynamic properties in liquid state for ternary Al-Ni-Zn alloys using the newest version of the general solution model for thermodynamic prediction are presented. Nine sections w... The results of the calculation of thermodynamic properties in liquid state for ternary Al-Ni-Zn alloys using the newest version of the general solution model for thermodynamic prediction are presented. Nine sections with different molar ratios of Ni to Zn, Zn to Al and Al to Ni were investigated in a temperature interval of 1800-2000 K. Partial and integral molar thermodynamic properties in liquid phase for the Al-Ni-Zn ternary system are determined and discussed. 展开更多
关键词 ternary system Al-Ni-Zn alloys THERMODYNAMICS CALCULATION general solution model
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First-principles calculations of structural, electronic, elastic and thermal properties of phase M_2SiC(M=Ti,V,Cr,Zr,Nb,Mo,Hf,Ta and W) 被引量:3
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作者 B.GHEBOULI M.A.GHEBOULI +3 位作者 M.FATMI L.LOUAIL T.CHIHI A.BOUHEMADOU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第3期915-925,共11页
The structural,electronic and elastic properties of the M_2SiC phases were studied,where M are 3d,4d,and 5d early transition metals.The valence electron concentration(VEC) effect of Ti,V,Cr,Zr,Nb,Mo,Hf,Ta and W on the... The structural,electronic and elastic properties of the M_2SiC phases were studied,where M are 3d,4d,and 5d early transition metals.The valence electron concentration(VEC) effect of Ti,V,Cr,Zr,Nb,Mo,Hf,Ta and W on these properties was examined.The C_(44) saturates for a VEC value in surrounding of 8.5 for each serie.Hf-s,Ta-s and W-s electrons mainly contribute to the density of states at the Fermi level,and should be involved in the conduction properties.The distortion increases with increasing VEC and decreasing k_c/k_a factor except for the series M=Ti,V and Cr,where it is lower at the VEC value of 8.5(it follows a parabolic variation).The M_2SiC was characterized by a profound anisotropy for the shear planes(1010) and compressibility in the direction is higher than that along the cone except for W_2SiC,where it is lower. 展开更多
关键词 ternary carbides ab initio calculation crystal structural electronic structure
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3D FEM analysis for layered rock considering anisotropy of shear strength 被引量:3
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作者 张玉军 张维庆 《Journal of Central South University》 SCIE EI CAS 2010年第6期1357-1363,共7页
An empirical expression of cohesion (C) and friction angle (Ф) for layered rock was suggested. This expression was compared with a test result made by the former researchers. The constitutive relationship of a tr... An empirical expression of cohesion (C) and friction angle (Ф) for layered rock was suggested. This expression was compared with a test result made by the former researchers. The constitutive relationship of a transversely isotropic medium and Mohr-Coulomb criterion in which C and Ф vary with directions were employed, and a relative 3D elasto-plastic FEM code was developed, in which the important thing was to adopt a search-trial method to find the orientation angle (p) of shear failure plane (or weakest shear plane) with respect to the major principal stress as well as the corresponding C and Ф Taking an underground opening as the calculation object, the numerical analyses were carried out by using the FEM code for two cases of transversely isotropic rock and isotropic rock, respectively, and the computation results were compared. The results show that when the rock is a transversely isotropic one, the distributions of displacements, plastic zones and stress contours in the surrounding rock will be non-axisymmetric along the tunnel's vertical axis, which is very different from that of isotropic rock. The stability of the tunnel in transversely isotropic rock is relatively low. 展开更多
关键词 layered rock mass shear strength ANISOTROPY three dimensional finite element method computation analysis
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Calculating models of mass action concentrations for structural units or ion couples in RbCl-H_2O binary system and RbCl-RbNO_3-H_2O ternary system 被引量:1
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作者 郭汉杰 杨学民 赵伟洁 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第6期1112-1120,共9页
Thermodynamic models of calculating mass action concentrations for structural units or ion couples in RbCl-H2O binary and RbCl-RbNO3-H2O ternary strong electrolyte aqueous solutions were developed based on the ion and... Thermodynamic models of calculating mass action concentrations for structural units or ion couples in RbCl-H2O binary and RbCl-RbNO3-H2O ternary strong electrolyte aqueous solutions were developed based on the ion and molecule coexistence theory at 298.15 K.A transformation coefficient is needed to compare the calculated mass action concentration and the reported activity because they are obtained at different standard states and concentration units.The results show that the transformation coefficients between the calculated mass action concentrations and the reported activities of the same structural units or ion couples in RbCl-H2O binary and RbCl-RbNO3-H2O ternary strong electrolyte aqueous solutions change in a very narrow range.The transformed mass action concentrations of structural units or ion couples in RbCl-H2O binary system are in good agreement with the reported activities. The transformed mass action concentrations of RbCl and RbNO3 in RbCl-RbNO3-H2O ternary solution are also in good agreement with the reported activities,aRbCl and 3RbNOa,with different total ionic strengths as 0.01,0.05,0.1,0.5,1.0,1.5,2.0,3.0 and 3.5 mol/kg,respectively.All those results mean the developed thermodynamic model of strong electrolyte aqueous solutions can reflect structural characteristics of RbCl-H2O binary and RbCl-RbNO3-H2O ternary strong electrolyte aqueous solutions and the mass action concentration also strictly follows the mass action law. 展开更多
关键词 mass action concentration ACTIVITY ion and molecule coexistence theory RbCl-H2O RbCl-RbNO3-H2O structural unit ion couple
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Research on the Shrinking of 2-components Adhesive with Automatically Calculating Hologram
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作者 WANG Wensheng (Changchun College of Optics and Fine Mechanics, Changchun 130022, CHN ) 《Semiconductor Photonics and Technology》 CAS 1998年第2期118-122,共5页
In this paper, used BSO(Bi12SiO(20)) crystal as a hologram recording material,TV-camera as a detector, and a holographic setup controlled by a computer, automatically calculating hologram of 3-interferograms method ... In this paper, used BSO(Bi12SiO(20)) crystal as a hologram recording material,TV-camera as a detector, and a holographic setup controlled by a computer, automatically calculating hologram of 3-interferograms method is theoretically and experimentally studied. This new holographic recording material and automatically calculating hologram make it possible to use real-time holography in an industry. As a practical example, the shrinking of 2-components adhesive in 4 h is measured. 展开更多
关键词 BSO Crystal Micro-computer Real-time Holography Shrinking of an Adhesive Layer TV-Camera
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Prediction of Critical Endpoints Based on the PR Equation of State 被引量:1
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作者 杨全 朱慎林 李以圭 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2009年第5期791-795,共5页
In the design of chemical processes,such as catalytic cracking of bitumen and heavy oil,the knowledge of phase behavior at the critical endpoint is essential.Based on the PR equation of state,the algorithm developed b... In the design of chemical processes,such as catalytic cracking of bitumen and heavy oil,the knowledge of phase behavior at the critical endpoint is essential.Based on the PR equation of state,the algorithm developed by Heidemann and Khalil for calculating critical properties was used to compute critical points.An algorithm for determining the equilibrium phase of the critical point using the tangent plane criterion was developed,and was used to calculate the critical endpoints of different mixtures,including non-polar,polar and associating systems.The critical endpoint,representing the type of the phase behavior,was employed to fit the interaction parameter of mixtures in critical state at high pressure.Lines of critical endpoints for ternary mixtures were also determined with the algorithm. 展开更多
关键词 criticai endpoint PR equation of state interaction parameter
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Discussion and study on contraction joints for RCC gravity dam
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作者 ZHANG Xiao-fei LI Shou-yi CHEN Yao-long 《Journal of Energy and Power Engineering》 2009年第3期13-17,共5页
Based on the construction property of rolled compacted concrete, three-dimensional finite element relocating mesh method was developed in simulating construction process and computing temperature and stress field. Usi... Based on the construction property of rolled compacted concrete, three-dimensional finite element relocating mesh method was developed in simulating construction process and computing temperature and stress field. Using this method, the temperature and the thermal stress fields developed in the RCC gravity dam of the Longtan project with or without a longitudinal joint during construction and operation are calculated so as to simulate the construction process. The computation results show that the value of the thermal stresses developed in the dam even, without any longitudinal joint, could meet the design criteria provided the placement temperature is adequately controlled. 展开更多
关键词 three-dimensional finite element relocating mesh method thermal stress construction process longitudinal joint placement temperature
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