Effect of Gas Volume Fraction on the Energy Loss Characteristics of Multiphase Pumps at Each Cavitation Stage

In the process of conveying a medium, when inlet pressure is low, cavitation phenomenon easily occurs in pump, especially gas–liquid two-phase working condition. The occurrence has great impact on performance multiphase pump. this paper, SST (sheard stress transport) k-? turbulence model and ZGB (Zwart–Gerber–Belamri) were used to simulate helical axial flow pump (hereinafter referred as pump), experimental verification was carried out. effect gas volume fraction (GVF) energy loss characteristics each stage analyzed detail. study shows that critical coefficient gradually decreases with increase GVF, which depresses evolution cavitation, hump improved. ratio total friction impeller fluid domain increases development pressurization cavitation. results can provide theoretical guidance for improvement