Numerical Simulation and Dynamic Analysis of Cavitation on Twisted Hydrofoil
Cavitation stability is always considered by propeller designers.Dynamic behavior of sheet cavitation on a Twist-11N hydrofoil is numerically simulated by using the Schnerr-Sauer cavitation model and large eddy simulation.In view of working conditions at different cavitation numbers and different geometry attack angles,the contrast analysis is performed for sheet cavitation shedding frequency,cavitation volume,and pressure distribution.Noise characteristics are obtained by using the formula of monopole acoustic radiation.The results show that there is an unstable cavitation number in the development of sheet cavitation,and there is significant difference between the radiation noise before and after cavitation instability.The results can be used to optimize dynamic characteristics of cavitation and control of cavitation noise.
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