船舶螺旋桨空化噪声预报初步

PRELIMINARY RESULTS ON THE PREDICTION OF SHIP PROPELLER CAVITATION NOISE POWER SPECTRA FROM THE MEASUREMENT OF ITS MODEL IN A CAVITATION TUNNEL

摘要: 本文介绍基于能量观点的原型螺旋桨空化噪声基本预报公式以及经过空泡空气含量修正的预报公式,并提供了预报结果。模型桨空化噪声谱是在上海交通大学空泡水筒中测得,其原型桨的谱在实海中测得。预报实例证实,基本预报公式是适用的,经过空气含量修正的预报公式可获得比较精确的预报结果。

Abstract: Propeller cavitation noise spectra were measured in the cavitation tunnel of Shanghai Jiao-tong University as well as in actual ship. Formulae of prediction for prototype propeller cavitation noise spectra in a ship are derived on the basis of energy relations. The formula with correction of air content of bubble gives more accurate results.