| 用SPIV测量结果分析叶轮机内流动损失的方法初探 |
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| 引用本文： | 刘宝杰,于贤君,蒋浩康.用SPIV测量结果分析叶轮机内流动损失的方法初探[J].航空动力学报,2009,24(11):2551-2557. |
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| 作者姓名： | 刘宝杰 于贤君 蒋浩康 |
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| 作者单位： | 北京航空航天大学,能源与动力工程学院航空发动机气动热力科技重点实验室,北京,100191 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展规划(973计划)，北京航空航天大学博士研究生创新基金 |
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| 摘 要： | 基于大涡模拟和PIV(particle image velocimetry)测量的相似性,利用SPIV(stereoscopic PIV)测量结果,可以使用亚格子应力模型求解流场中的湍流耗散率.对比不同亚格子应力模型求出的结果,混合模型求出的结果较为准确,但需要合理选择模型中的系数C_(Sm)和C_(Am).利用该方法分析低速大尺寸压气机试验台转子近叶尖区域的SPIV测量结果,发现在设计状态流场中的损失主要源于叶尖泄漏涡,而在近失速状态则主要源于叶尖泄漏涡和角区旋涡.
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| 关 键 词： | 熵 流动损失 PIV/SPIV(粒子图像测速仪/体视粒子图像测速仪) 压气机 |
| 收稿时间： | 2008/10/27 0:00:00 |
| 修稿时间： | 1/6/2009 12:00:00 AM |
Method for analyzing flow losses in turobmachinery by using the measured results of stereoscopic particle image velocimetry |
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| LIU Bao-jie,YU Xian-jun and JIANG Hao-kang.Method for analyzing flow losses in turobmachinery by using the measured results of stereoscopic particle image velocimetry[J].Journal of Aerospace Power,2009,24(11):2551-2557. |
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| Authors: | LIU Bao-jie YU Xian-jun and JIANG Hao-kang |
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| Affiliation: | National Key Laboratory of Science and Technology on Aero-Engines, School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;National Key Laboratory of Science and Technology on Aero-Engines, School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;National Key Laboratory of Science and Technology on Aero-Engines, School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | A method to calculate the entropy production rate based on the measured velocity flow fields was established based on the similar processes between stereoscopic particle image velocimetry(SPIV)measurement and large eddy simulation(LES).Comparing the turbulence dissipation rate estimated by several typical subgrid-scale(SGS) stress models,it can be found that the result calculated by the mixing model is most reasonable;however,the coefficients CSm and CAm should be well determined.Using the mixing model the entropy production rate of the complex flow fields near the rotor tip region measured by SPIV were analyzed.The results show that at the design condition the losses are mainly caused by the tip leakage vortex,while at the near-stall condition both the tip leakage vortex and the corner vortex can bring large flow losses. |
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| Keywords: | entropy flow losses PIV/SPIV (particle image velocimetry/ stereoscopic PIV) compressor |
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