Numerical Simulation and Experiment Research on Non-cavitation noise of Underwater Counterrotation Propellers

Abstract

The non-cavitation noise of counter-rotation propeller is one of the key factors for detection and recognition high speed underwater vehicles. A hybrid numerical simulation method of underwater counter-rotation propeller non-cavitation noise is presented in this paper. An experimental verification is also included. The sound pressure spectrum model is presented to describe its non-cavitation noise with application of generalized acoustic analogy method. The counter-rotation propeller noise is predicted by using frequency-domain acoustic analogy. The flow field is analyzed with computation fluid dynamics based on viscous flow theory. The flow field pressure is used for acoustic spectrum prediction. The numerical simulation results are verified by cavitation-tunnel experiment. Through the study, the counter-rotation propeller non-cavitation noise is analyzed. The overall results indicated that the numerical approach is reliable for predicting non-cavitation noise of counter-rotation propeller, which is beneficial for characteristics extraction and identification of underwater high-speed vehicles