叶片与隔舌干涉对离心泵性能和压力脉动影响的数值研究Effect of Interaction between Blade and Volute Tongue of Centrifugal Pumps on the Performance and Pressure Pulsation
司乔瑞;袁寿其;袁建平;李彤;
摘要(Abstract):
采用SST k-ω湍流模型对离心泵内部流场进行了三维非定常数值模拟,分析了不同时刻叶片与隔舌相对位置对模型泵瞬时性能及压力脉动的影响。利用数理统计学原理和时-频域数据处理方法对流场内监测点的压力脉动进行分析。结果显示:叶片与隔舌间的动静干涉引起模型泵瞬时性能呈周期性变化,瞬时扬程与瞬时效率波动较大而瞬时轴功率波动值较小;改进特定时刻叶片与隔舌相对位置处泵的最低瞬时性能是提高其总体性能的一条途径;隔舌及叶片附近均是较强的脉动源,脉动最强的部位不在隔舌顶部而是向螺旋线方向偏移;叶片通过频率是压力脉动的主要频率。
关键词(KeyWords): 离心泵;干涉;瞬时性能;压力脉动
基金项目(Foundation): 国家自然科学基金资助项目(50979034);; 国家杰出青年科学基金资助项目(50825902)
作者(Author): 司乔瑞;袁寿其;袁建平;李彤;
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