Numerical analysis on the performance and axial force characteristics of low specific speed and high head aviation fuel pump

Abstract

The research on the axial force is an important issue for the fuel pump. For the aviation fuel pumps with low specific speed and high head, due to the larger projection area of its impeller cover, and the higher fluid pressure in the pump cavity are more likely to cause an excellent axial force. The performance and axial force characteristics of low specific speed and high head aviation fuel pump was numerically simulated and analyzed. The results of the study showed that the main parts of the fuel pump that generate axial force are the front cover, the rear cover, the impeller and the inducer. The axial force can be reduced by increasing the diameter of the rear cover labyrinth ring and adding the balancing holes. Thus, reducing the loss of the fuel pump and improving the hydraulic efficiency, and the problem of excessively high temperature of the fluid in the pump is solved. This study is helpful to improve the operation stability of fuel pump, and provide reference for subsequent research.