Effect of the Gap Matching Relation on the Pressure Pulsation Characteristics at Blade’s Surface of the Multiphase Pump

The pressure pulsation characteristics of the blade’s surface have an impact on lifespan multiphase pump impeller. To explore influence gap matching relation at pump, axial clearance coefficient (ACC) between impeller and diffuser relative tip were defined. By combining numerical simulation experiment, single pressurization unit studied under different relations. results show that size leakage flow strength rotor-stator interaction caused by clearances a decisive in With increase clearance, internal field distribution law was greatly changed, which had great peak-to-peak value dominant frequency amplitude suction surface. In addition, mainly affected interaction. When weakened, decreased degrees. As ACC increased, variation gradually slowed down diffuser, monitoring points most sensitive to change ACC. research can provide theoretical reference for optimal design blades.