Cavitation Characteristics of High-Speed Fuel Centrifugal Pump

In order to reveal the cavitation form in the high-speed fuel centrifugal pump and the occurrence condition of cavitation in the tongue region，unsteady numerical calculation was carried out，and the characteristics of cavitation flow field and pressure transient characteristics in the high-speed fuel pump at different flow rates were analyzed. The results show that the cavitation first appears on the leading edge of the blade under different flow rates. As the cavitation number decreases，cavitation occurs at the root of the blade and the back of the extended blade. The cavitation in the tongue region is at a low cavitation number under 1.2 times design flow rate. Cavitation has a greater impact on the pressure load on the root of the blade surface. The main frequency of the impeller channel monitoring point is the axial passing frequency. The main frequency of the pulsation of the tongue monitoring point is the blade passing frequency. Under the 1.2 times design flow rate，the frequency doubling characteristic of axial frequency is enhanced in the pressure fluctuation spectrum of monitoring point in tongue region. © 2022 Journal of Propulsion Technology. All rights reserved.