Unsteady Turbulent Flow Numerical Simulation of the Whole Channel Large Bulb Tubular Pumping Station

摘要

The pressure pulsation caused by rotor-stator interaction in the large bulb tubular pump is the main hydraulic reason for vibrations of pumping station. In order to study the mechanics of flow induced vibration, incompressible continuity equation, Reynolds average Navier-Stokes and RN G k e turbulent equations are used to simulate the 3-D whole channel unsteady turbulent flow of bulb tubular pump in this paper. Advanced sliding mesh technology are used to simulate the interaction between the rotor and the stator in the unit. Velocity and pressure distributions of the flow passage are analyzed. Some measuring points are set in the flow passage to obtain the pressure pulsations of every location especially near the blades. Using Fast Fourier Transformation, the spectrum characteristics of the pressure pulsations are studied, which will provide a good foundation for the structure vibration analysis of the pumping station.