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不同旋转雷诺数和内外半径比对泰勒库特流动特性的影响 被引量:2
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作者 王鹏亮 张晓威 +2 位作者 金鼎铭 邱希望 刘国庆 《流体机械》 CSCD 北大核心 2022年第4期71-77,共7页
为了提高电转子散热性能,提升旋转机械性能和机器的长周期运行稳定性,对转定子之间的气隙流动特性进行了研究,采用数值模拟方法对冷却工质在电机转定子之间气隙内的泰勒库特流动进行模拟,获得了气隙和转速变化下的涡流场信息,对比分析... 为了提高电转子散热性能,提升旋转机械性能和机器的长周期运行稳定性,对转定子之间的气隙流动特性进行了研究,采用数值模拟方法对冷却工质在电机转定子之间气隙内的泰勒库特流动进行模拟,获得了气隙和转速变化下的涡流场信息,对比分析不同条件下的涡形态。结果表明,当雷诺数从8000开始增大时,随着雷诺数的增加,泰勒涡变得越来越清晰越来越大,当雷诺数增大到16000以后,泰勒涡结构发生了严重的扭曲。随着半径比的增大,流体的流动特性更加趋近于剪切作用起主导的平板库特流动。 展开更多
关键词 泰勒库特流动 旋转雷诺数 数值模 流动特性
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以Couette流动方式为基础的电流变液测试系统的研制
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作者 张建华 冯常勤 +1 位作者 陶德华 张直明 《仪器仪表学报》 EI CAS CSCD 北大核心 2004年第3期306-309,共4页
在分析电流变液 (Electrorheological fluids)测试技术特点的基础上 ,研制了一种基于库特 (Couette)流动方式的电流变测试系统。对由上海大学研制的几种电流变液进行了性能测试 ,结果表明所建立的电流变测试仪具有较好的重复性与可行性 ... 在分析电流变液 (Electrorheological fluids)测试技术特点的基础上 ,研制了一种基于库特 (Couette)流动方式的电流变测试系统。对由上海大学研制的几种电流变液进行了性能测试 ,结果表明所建立的电流变测试仪具有较好的重复性与可行性 ,可以准确、方便地获得与电流变效应有关的剪切应力。 展开更多
关键词 电流变测试仪 电流变液 Couette流动形式 测试系统 库特流动 剪切应力 漏电流
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Three dimensional free convection couette flow with transpiration cooling
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作者 JAIN N. C. GUPTA P. 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2006年第3期340-346,共7页
Free convection flow between two vertical parallel plates with transverse sinusoidal injection of the fluid at the stationary plate and its corresponding removal by constant suction through the plate in uniform motion... Free convection flow between two vertical parallel plates with transverse sinusoidal injection of the fluid at the stationary plate and its corresponding removal by constant suction through the plate in uniform motion has been analyzed. Due to this type of injection velocity, the flow becomes three-dimensional. Analytical expressions for the velocity, temperature, skin friction and rate of heat transfer were obtained. The important characteristics of the problem, namely the skin friction and the rate of heat transfer are discussed in detail with the help of graphs. 展开更多
关键词 Couette flow Free convection Three-dimensional flow Transpiration cooling Transverse sinusoidal injection
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Three dimensional Couette flow and heat transfer through a porous medium with variable permeability
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作者 CHAUDHARYR.C. SHARMAPawanKumar 《Journal of Zhejiang University Science》 CSCD 2003年第2期181-185,共5页
This paper reports research on the effects of variations in injectio n velocity and perm eability on the heat transfer and flow through a highly porous medium betwee n two horizontal parallel plates situated at consta... This paper reports research on the effects of variations in injectio n velocity and perm eability on the heat transfer and flow through a highly porous medium betwee n two horizontal parallel plates situated at constant distance with constant suc tion by the upper plate.Due to this type of variation in injection velocity and in permeability the flow becomes three dimensional.The governing equations are sol ved by adopting complex variable notations to obtain the expressions for the ve locity and temperature field. The skin-friction along the main flow direction and rate of heat transfer are discussed with the help of graphs. 展开更多
关键词 Couette flow Porous medium Heat transfer Permeability injection/suction.
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