导叶式离心泵瞬态空化流动及压力脉动分析

王浩; 李林伟; 牟成琪; 周佩剑; 吴登昊

doi:10.3969/j.issn.1000-1158.2023.06.14

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计量学报 ›› 2023, Vol. 44 ›› Issue (6) : 931-938. DOI: 10.3969/j.issn.1000-1158.2023.06.14

力学计量

导叶式离心泵瞬态空化流动及压力脉动分析

王浩¹,李林伟²,牟成琪³,周佩剑¹,吴登昊¹

作者信息 +

Analysis of Transient Cavitation Flow and Pressure Pulsation of Guide Vane Centrifugal Pump

WANG Hao¹,LI Lin-wei²,MOU Cheng-qi³,ZHOU Pei-jian¹,WU Deng-hao¹

Author information +

文章历史 +

摘要

采用RNG k-ε湍流模型和Zwart-Gerber-Belamri空化模型对导叶式离心泵进行数值模拟,得到内部压力脉动频谱曲线。结果表明:叶轮监测点压力脉动峰峰值沿流动方向逐渐降低,主频为8倍转频及其倍频;随着空化加剧,叶轮压力脉动峰峰值逐渐降低;正反导叶压力脉动主频均为叶频及其倍频,且幅值随空化发展而增加;空化在轴向上表现为自叶轮前盖板向后盖板空泡体积分数逐渐增加;叶轮与正导叶之间动静干涉使叶轮内流场产生周期性变化,造成压力脉动呈现周期性波动。

Abstract

The RNG k-ε turbulence model and the Zwart-Gerber-Belamri cavitation model are used to numerically simulate a guide vane centrifugal pump, and the internal pressure pulsation spectrum curve is obtained. The results show that the pressure pulsation peak-to-peak value of the impeller monitoring point gradually decreases along the flow direction, and the main frequency is 8 times the rotation frequency and its multiplication frequency. With the intensification of cavitation, the peak-to-peak value of impeller pressure pulsation gradually decreases. The main frequencies of the pressure pulsation of the forward and reverse guide vanes are both the vane frequency and its multiplier, and the amplitude increases with the development of cavitation. The cavitation in the axial direction shows that the cavitation volume fraction gradually increases from the front cover plate to the rear cover plate of the impeller. The dynamic and static interference between the impeller and the positive guide vane causes periodic changes of the flow field in the impeller, resulting in periodic fluctuations in the pressure pulsation.

导出引用

王浩,李林伟,牟成琪,周佩剑,吴登昊. 导叶式离心泵瞬态空化流动及压力脉动分析[J]. 计量学报. 2023, 44(6): 931-938 https://doi.org/10.3969/j.issn.1000-1158.2023.06.14

WANG Hao,LI Lin-wei,MOU Cheng-qi,ZHOU Pei-jian,WU Deng-hao. Analysis of Transient Cavitation Flow and Pressure Pulsation of Guide Vane Centrifugal Pump[J]. Acta Metrologica Sinica. 2023, 44(6): 931-938 https://doi.org/10.3969/j.issn.1000-1158.2023.06.14

中图分类号： TB937

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