The Effects of Hydrophone End-Cap Extension on the Flow-Generated Noise

Abstract

The flow field around a hydrophone generates self-noise which may contaminate the sound-field detection by a hydrophone. Hence, four hydrophone dome models are designed, and the flow field and sound field around them are compared. The RNG k–ε turbulence model is used for steady calculation. The results show that the four models have a fine diversion effect, and there is no obvious vortex and circumfluence because of them. The Curle model is used to simulate the sound source calculation of the hydrophone dome. The leading edge area of each model is found as the main noise source. The large eddy simulation/FW-H hybrid method is applied for the acoustic field calculation. The flow noise around the four models is studied. By summarizing the results of different models, the rules of flow noise around the hydrophone domes are analyzed. The suggestions for the hydrophone dome design are given based on the comprehensive evaluation of the noise generated by each hydrophone dome.