Abstract—Regenerative pumps are receiving increasing interest in industry because of their low cost, low-specific speed, compactness and ability to deliver high heads with stable performance. However, the regenerative pump used in automotive is facing a noise problem. To understand the mechanism in detail, Computational Fluid Dynamics (CFD) and Computational Acoustic Analysis (CAA) together were used to understand the fluid and acoustic characteristics of the fuel pump. The fluid dynamic characteristics of the regenerative fuel pump were investigated numerically using three-dimensional steady and unsteady Reynolds-averaged Navier-Stokes analysis with a shear stress transport turbulence model in ANSYS-CFX 15.0. After the CFD model was validated by the mass flow rate from experiment, the pump inner wall pressure fluctuations extracted from the unsteady flow calculation were used to implement acoustic analysis using finite/boundary element method, vibration-acoustic coupling method and Automatically Matched Layer (AML) method in LMS Virtual. Lab Rev12. Comparing the computational and experimental results shows that sound pressure levels at the observer position are consistent at high frequencies, especially at blade passing frequency.
Index Terms—Regenerative pump, pressure fluctuation, dipole, BPF noise.
Ji-Fu Wang, Hui-Hua Feng, and Xiao-Long Mou are with School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China (e-mail: wjfbit@163.com, fenghh@bit.edu.cn, mxlzhenzhu@163.com).
Yong-Xuan Huang is with Chongqing Changan Automobile Co., Ltd, China (e-mail: hyxx92@126.com).
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Cite: Ji-Fu Wang, Hui-Hua Feng, Yong-Xuan Huang, and Xiao-Long Mou, "Numerical and Experimental Research on Hydraulically Generated Noise of a Regenerative Automotive Fuel Pump," International Journal of Materials, Mechanics and Manufacturing vol. 6, no. 1, pp. 57-62, 2018.
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