Prediction of non-cavitation propeller noise in time domain |
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Authors: | Jin-ming Ye Ying Xiong Chang-run Xiao Yi Bi |
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Affiliation: | (1) Department of Systems Engineering and Naval Architecture, National Taiwan Ocean University, Keelung, Taiwan, ROC;(2) Hung Shen Propellers Co., LTD, Kaohsiung, Taiwan, ROC; |
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Abstract: | The blade frequency noise of non-cavitation propeller in a uniform flow is analyzed in time domain. The unsteady loading (dipole source) on the blade surface is calculated by a potential-based surface panel method. Then the time-dependent pressure data is used as the input for Ffowcs Williams-Hawkings formulation to predict the acoustics pressure. The integration of noise source is performed over the true blade surface rather than the nothickness blade surface, and the effect of hub can be considered. The noise characteristics of the non-cavitation propeller and the numerical discretization forms are discussed. |
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Keywords: | propeller surface panel method noise time domain |
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