Abstract
Venturi tube flow is prone to cavitation at high flow rate. In this paper, based on the study of the cavitation flow field in Venturi tube, the authors improve the throat structure of Venturi tube with cavity and carry out analysis of numerical simulation Flow field characteristics by Large eddy simulation (LES), analyze the pressure pulsation in Venturi tube to explore the change of pressure and velocity in different positions, study on the change of cavitation volume fraction, explore the changes of cavitation number and cavitation length under different pressure ratios. Through the previous research and analysis, the flow field characteristics of Venturi tube with cavity are understood, which lays the foundation for cavitation application of Venturi tube.
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