叶片出口边侧斜对船用离心泵振动和水动力噪声的影响

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摘要本文以125clla-13型船用离心泵为研究对象，研究叶片出口边侧斜对船用离心泵振动和水动力噪声的影响。首先对出口边非侧斜和侧斜两种叶轮模型泵进行全流场非定常数值计算，提取蜗壳及泄漏流道壁面脉动激励作为载荷，对两种模型泵进行基于模态响应的振动计算和基于边界元法的水动力噪声计算，并对非侧斜出口模型泵进行振动测试，经试验验证，模型泵振动噪声数值预测具有一定可行性。进一步对比两种出口方式模型泵计算结果，分析表明：叶片非侧斜出口模型泵振动加速度计算结果整体高于叶片侧斜出口；两种出口方式模型泵声功率随工况变化趋势一致，设计工况声功率最小，大流量工况声功率最大，叶片侧斜出口模型泵声功率和声压级都明显低于非侧斜出口，且声压级降幅从APF到4BPF大致呈上升趋势。从减振降噪角度考虑，叶片侧斜出口方式优于非侧斜出口方式。该研究可为船用离心泵减振降噪设计提供参考。

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	黄浩钦刘厚林王勇蒋玲林邵昌

关键词 ：船用离心泵, 出口边侧斜, 振动噪声, 数值模拟, 偶极子源

Abstract：

In order to analyze the effect of inclined trailing edge of blade on the vibration and hydrodynamic noise of marine centrifugal pump,a 125clla-13 type marine centrifugal pump was chosen as the research object.Firstly the blade with inclined trailing edge and the blade without inclined trailing edge were used to the unsteady numerical simulation of the pump’s whole flow passage respectively, and then the pressure fluctuation of the wall of volute and leakage flow was obtained as the vector load.By loading the vector as the vibration source and dipole source,the simulation of vibration based on modal response and simulation of the hydrodynamic noise based on BEM were conducted.Also the vibration experiment of the pump without inclined trailing edge was done,and it was verified by the vibration experiment that the simulation of NVH had certain feasibility.The further work was to analyze the simulation results of the two blade styles,the results show that the vibration acceleration of the blade with inclined trailing edge is less than the other one on the whole, the changing trend of the sound power of the two blade styles along with the conditions is consistent,the minimum of sound power is at the design condition,and the maximum is at the larger flow condition.All the sound power and the SPL of the blade with inclined trailing edge are obviously less than the other one,and the decreasing amplitude of the SPL is generally on the rise from APF to 4BPF.Considering the terms of vibration and noise reduction,the blade with inclined trailing edge is superior to the blade without inclined trailing edge.The research results are useful for the vibration and noise reduction design of the marine centrifugal pump.

Key words： marine centrifugal pump inclined trailing edge;noise and vibration;numerical simulation dipole source

收稿日期: 2014-04-18 出版日期: 2015-06-25

引用本文:

黄浩钦刘厚林王勇蒋玲林邵昌. 叶片出口边侧斜对船用离心泵振动和水动力噪声的影响[J]. 振动与冲击, 2015, 34(12): 195-200.
HUANG Hao-qin LIU Hou-lin WANG Yong JIANG Ling-lin SHAO Chang. Effect of inclined trailing edge of blade on vibration and hydrodynamic noise of marine centrifugal pump. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(12): 195-200.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2015/V34/I12/195

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