Transient flow structures and pressure pulsations of a high-pressure aero-fuel centrifugal pump

被引：1

作者：

Li J. ^{[1
]}

Li H. ^{[2
]}

Zhang W. ^{[3
]}

Wang Y. ^{[4
]}

Li K. ^{[4
]}

Wang S. ^{[4
]}

机构：

[1] School of Construction Machinery, Chang'an University, Xi'an

[2] School of Power and Energy, Northwestern Polytechnical University, Xi'an

[3] Shaanxi Aerospace and Astronautics Propulsion Research Institute, Xi'an

[4] China AVIC Xi'an Aero-Engine Controls Technology Co., Ltd, Xi'an

来源：

Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University | 2022年 / 40卷 / 01期

关键词：

Aero-fuel centrifugal pump; Flow structure; Pressure pulsation; Transient flow characteristic; Turbulence kinetic energy;

D O I：

10.1051/jnwpu/20224010199

中图分类号：

学科分类号：

摘要：

In order to study the complex transient flow characteristics of a high-pressure aero-fuel centrifugal pump within its full working envelope, a certain type of centrifugal pump is numerically simulated, in which the simulation results are compared with the experiment results to verify the effectiveness of the present simulation method. Then, the verified simulation method is selected to analyze the transient flow characteristics, in which the time-frequency characteristic of pressure pulsation at monitored positions is analyzed by using fast fourier transform. In addition, the unsteady flow structures are studied by focusing on the relative speed, turbulent kinetic energy and so on. The results show that the main frequency of pressure pulsation in the impeller and volute is rotation frequency and blade frequency, respectively, where different monitoring points show similar trend. Meanwhile, the flow is relatively stable under design flow rate condition. However, a certain large-scale vortex appears in the impeller channel under small flow rate conditions, which mainly exists at the exit of the impeller channel near the tongue. In addition, turbulent kinetic energy at the exit of the impeller and the tongue has a large distribution range and changes seriously, where a certain hydraulic loss is produced. © 2022 Journal of Northwestern Polytechnical University.

引用

页码：199 / 205

页数：6

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