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交变流动中突变截面局部损失特性分析
Minor Losses of Oscillating Flow Through a Sudden Change Area
查看参考文献8篇
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文摘
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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PIV(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计算结果的可靠性,进而利用CFD模拟考察了四个无量纲参数对阻力特性的影响规律。 |
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其他语种文摘
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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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来源
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工程热物理学报
,2012,33(2):186-190 【核心库】
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关键词
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交变流动
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突变截面
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局部损失
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PIV测量
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CFD模拟
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地址
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1.
中国科学院理化技术研究所, 中国科学院低温工程学重点实验室;;国家微重力实验室, 北京, 100190
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中国科学院理化技术研究所, 中国科学院低温工程学重点实验室, 北京, 100190
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语种
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中文 |
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ISSN
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0253-231X |
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学科
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能源与动力工程 |
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基金
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国家973计划
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国家自然科学基金重大项目
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文献收藏号
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CSCD:4442281
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参考文献 共
8
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