• CN：11-2187/TH
• ISSN：0577-6686

• 交叉与前沿 •

### 离心泵后泵腔内液体压力数值分析与验证

1. 1. 西北工业大学动力与能源学院 西安 710129;
2. 先进航空发动机协同创新中心 北京 100191
• 出版日期:2016-02-15 发布日期:2016-02-15
• 作者简介:董玮,男,1987年出生,博士研究生。主要研究方向为流体机械流动理论、测试与控制。E-mail：735381559@qq.com;楚武利(通信作者),男,1962年出生,博士,教授,博士研究生导师。主要研究方向为叶轮机械气动热力学。E-mail：wlchu@nwpu.edu.cn
• 基金资助:
国家自然科学基金资助项目(51576162,51236006)

### Numerical Analysis and Validation of Fluid Pressure in the Back Chamber of Centrifugal Pump

DONG Wei1, CHU Wuli1, 2

1. 1. School of Power and Energy, Northwestern Ploytechnical University, Xi’
an 710129;
2. Collaborative Innovation Center of Advanced Aero-Engine, Beijing 100191
• Online:2016-02-15 Published:2016-02-15

Abstract: The axial thrust of a centrifugal pump and the pressure distribution in pump chamber are closely related. The cost of experimental measurement is high on axial thrust. Therefore, it is particularly necessary that the research on the rule of pressure distribution in the chamber of centrifugal pump is conducted by numerical simulation and the simple experimental measurement method of axial thrust is put forward. Under the condition of 0.6Qsp-1.2Qsp, the research on the rule of the axial, radial and tangential distribution of pressure in the back chamber of centrifugal pump is conducted by numerical simulation. The pressure of axial center in the back chamber along four different angles and the mean pressure along radial distribution curves are drew. The value of thrust force is calculated and two formulas are derived. A simple and convenient test measurement method of axial thrust in the chamber is put forward. Numerical and experimental results of pressure are compared to verify the reliability of the numerical method. The results show that the pressure increases along radial direction in the back chamber, while the change of its value is negligible along axial direction at the same flow condition. The distributional of the pressure difference gradually decreases from 0.6Qsp to 1.2Qsp along tangential and radial direction. The pressure is parabolic distribution along 90° radial direction when the flow rate is less than design flow condition. The pressure is axisymmetric along tangential direction and it increases along radial direction when the flow rate is larger than design flow condition. The relative errors of axial thrust among two formulas and numerical calculation are little about thrust force in the back chamber. The average value of region pressure is equal to the pressure on the geometric center. When the experimental measurement is carried out to get the axial thrust in the chamber, the data is approximately equal to the measurement results of the pressure along 180° radial direction on the geometric center.