文章摘要
程效锐,李天鹏,刘向,王鹏.声振耦合作用下叶片出口斜切对离心泵噪声的研究[J].声学技术,2021,40(6):843~850
声振耦合作用下叶片出口斜切对离心泵噪声的研究
Research on the effect of blade outlet oblique cutting on centrifugal pump noise under the action of sound and vibration coupling
投稿时间:2020-07-18  修订日期:2020-09-14
DOI:10.16300/j.cnki.1000-3630.2021.06.016
中文关键词: 离心泵  叶片斜切  数值计算  声振耦合  声场
英文关键词: centrifugal pump  blade oblique cutting  numerical calculation  coupling of sound and vibration  sound field
基金项目:国家自然科学基金(51469013)资助项目。
作者单位E-mail
程效锐 兰州理工大学能源与动力工程学院, 甘肃兰州 730050
甘肃省流体机械及系统重点实验室, 甘肃兰州 730050 
cxr168861@sina.com 
李天鹏 兰州理工大学能源与动力工程学院, 甘肃兰州 730050  
刘向 兰州理工大学能源与动力工程学院, 甘肃兰州 730050  
王鹏 重庆川仪流量仪表分公司, 重庆黄山 400700  
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中文摘要:
      为研究声振耦合作用下叶片斜切对离心泵内外声场的影响,以一台比转速ns=67的离心泵为研究对象,在保证叶轮前后盖板和蜗壳几何参数不变的情况下,只对叶片出口边进行斜切,同时基于RNG k-ε湍流模型和声学边界元/有限元(BEM/FEM)方法分别对离心泵进行全流场和声场计算。研究结果表明,对叶片出口边进行斜切,隔舌附近处压力脉动波动会呈现一定的周期性,叶轮出口的流场波动以及离心泵内外声场声压级都会随着斜切角度的增大而逐渐减小,内外声场声压级都在叶频处达到最大,随着频率的增大,声压级衰减程度增加,外声场声压级最大值主要集中在离心泵出口右上方附近。综合考虑离心泵能量性能和流场噪声,当叶片出口斜切角度为30°时,离心泵综合性能最佳。
英文摘要:
      In order to study the influence of blade oblique cutting on the sound field inside and outside the centrifugal pump under the action of sound and vibration coupling, the centrifugal pump with a specific speed ns=67 is taken as the research object. Under the conditions that the geometric parameters of the shroud and hub of impeller and the volute remain unchanged and only the blade outlet edge is beveled, the whole flow field and sound field of the centrifugal pump are calculated based on RNG k-ε turbulence model and acoustic boundary element method/finite element method (BEM/FEM) respectively. The results show that, when the blade outlet edge is beveled, the pressure fluctuation at the monitoring point of the impeller outlet shows certain periodicity; the flow field fluctuations at the impeller outlet and the sound field inside and outside the centrifugal pump gradually decrease with the increase of the beveling angle; the sound pressure of inner and external sound fields reach the maximum at the blade frequency; with the frequency increasing, the sound pressure attenuation increases, and the maximum sound pressure of the external sound field is mainly concentrated near the upper right of the centrifugal pump outlet. Considering the energy performance and flow field noise of the centrifugal pump, the comprehensive performance of the centrifugal pump is the best when the oblique cutting angle of the blade outlet is 30°.
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