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Development of a coupled numerical and experimental approach to hydrodynamic noise estimation

Felicjancik J., Gatz M., Badur J.

Transactions of the Institute of Fluid-Flow Machinery

2017

nr 138

89--105

The hydroacoustic signatures of ship propellers can be identiﬁed experimentally through measurements of cavitation-induced pressure ﬂuctuations and the accompanying noise distribution at model scale. These measurements have to be performed in a cavitation tunnel at the propellers operating conditions and with suﬃcient accuracy. In comparison, the numerical approach can be used to present a good general idea of the predicted results. Numerical methods can provide highly accurate tools for noise level and propagation prediction, as well as giving insight into the ﬂow ﬁeld and other key aspects. They are also not inﬂuenced by signal conditioning or disturbance sources present in a physical environment. So we trade scope and precision of the results for time and cost reduction. In this paper, we described both experimental and numerical methods currently in use and present advantages and limitations of the practical application of both.