| 交变流动中突变截面局部损失特性分析 |
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| 引用本文： | 陈燕燕,张宇坤,戴巍,罗二仓.交变流动中突变截面局部损失特性分析[J].工程热物理学报,2012(2):186-190. |
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| 作者姓名： | 陈燕燕 张宇坤 戴巍 罗二仓 |
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| 作者单位： | 中国科学院理化技术研究所低温工程学重点实验室;中国科学院力学所国家微重力实验室;中国科学院研究生院 |
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| 基金项目： | 国家自然科学基金重大项目(No.50890181);国家重点基础研究发展计划973项目(No.2010CB227303) |
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| 摘 要： | 从突变截面流道内流体满足的方程组出发，给出交变流动中突变截面阻力系数的定义以及考察方法，采用量纲分析法获得影响局部阻力特性的四个无量纲影响参数：动态雷诺数与幅值雷诺数之比、幅值雷诺数、变截面面积比、声场压力、速度相位差。通过PW（粒子成像测速仪）测量，分析了流场结构特征，并与CFD计算结果对比，验证了CFD计算结果的可...
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| 关 键 词： | 交变流动 突变截面 局部损失 PIV测量 CFD模拟 |
Minor Losses of Oscillating Flow Through a Sudden Change Area |
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| CHEN Yan-Yan,ZHANG Yu-Kun,DAI Wei,LUO Er-Cang.Minor Losses of Oscillating Flow Through a Sudden Change Area[J].Journal of Engineering Thermophysics,2012(2):186-190. |
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| Authors: | CHEN Yan-Yan ZHANG Yu-Kun DAI Wei LUO Er-Cang |
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| Institution: | 1 (1.Key Laboratory of Cryogenics.Technical Institute of Physics and Chemistry of CAS,Beijing 100190,China; 2.State Key Laboratory of Microgravity Research.Institute of Mechanics of CAS.Beijing 100190,China; 3.Graduate University of the Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | 0Minor losses for oscillating flow in a duct with sudden area change have been investigated through non-linear theoretical analysis.PIV measurement and CFD simulation.The flow filed was analyzed and results from the PIV measurement and CFD simulation were compared.It shows that the CFD simulation is useful for the flow characteristics analysis in oscillating flow.The influence of the four nondimensional parameters namely the dynamic Reynolds number,Reynolds number,the ratio of the area and the phase difference between pressure and velocity on the minor losses has been analyzed by CFD simulation. |
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| Keywords: | oscillating flow sudden change area minor losses PIV measurement CFD simulation |
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