流体机械

2019, v.47;No.569(11) 35-39+84

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气缸随转子转动滑片式压缩机内部瞬态流动分析
Simulation Analysis of the Internal Transient Flow in a Sliding Vane Compressor with Synchronous Rotating Cylinder

周晓裕;陈亚平;吴嘉峰;张少波;
Zhou Xiaoyu;Chen Yaping;Wu Jiafeng;Zhang Shaobo;School of Energy and Environment,Southeast University;

摘要(Abstract):

对一种气缸随转子同步转动滑片压缩机建立三维CFD模型并采用动网格技术模拟瞬态压缩过程,对给定压比下的压缩和流动特性以及不同出口位置的影响进行了分析。研究表明进出口过渡段和腔室有涡旋产生,有利于各腔室内速度、压力和温度分布的均匀化;压缩机滑片形成的多腔室有利于减小滑片两侧压差引起的泄漏;压缩机在旋转过程中出口质量流量呈现与滑片数量相关的波状变化,且出口质量流量随转速增大而增加;出口位置适当后移有利于提高压比,而流体温度变化不大,但出口质量流量有所减小。
A three-dimensional CFD model was established and the dynamic mesh technology was applied to simulate the transient compression process in the sliding vane compressor with synchronous rotating cylinder.The compression and flow characteristics under the given pressure radio were analyzed in detail and the impact of the different outlet position on exhaust process were also studied. The results show that vortices were generated in the transition sections of inlet and outlet and compression chambers,which is favorable to more homogeneous distribution of velocity,pressure and temperature in each chamber.The multi-chambers formed by the sliding vanes of the compressor were favorable to reducing leakage due to differential pressure.In the rotation process,the mass flow at the outlet of the compressor showed a wavy change related to the number of sliding vanes,and increased with the increase of rotating speed.The appropriate shifting back of the outlet position was favorable to increase of pressure ratio without big change of fluid temperature,but the mass flow at the outlet decreased somewhat.

关键词(KeyWords): 滑片式压缩机;同步转动气缸;数值模拟;瞬态流动
sliding vane compressors;synchronous rotating cylinder;numerical simulation;transient flow

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基金项目(Foundation): 国家自然科学基金资助项目(51776035)

作者(Author): 周晓裕;陈亚平;吴嘉峰;张少波;
Zhou Xiaoyu;Chen Yaping;Wu Jiafeng;Zhang Shaobo;School of Energy and Environment,Southeast University;

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