船模伴流场修正对螺旋桨激振力预报的影响

介绍Hoekstra船模伴流修正方法、伴流模拟方法及螺旋桨激振力测量的试验过程。以第16届ITTC推荐的Sydney Express桨为研究对象，在上海船舶运输科学研究所空泡实验室用网格方法模拟船舶艉部流场，通过布置在桨模上方相应位置平板上的5个传感器进行了脉动压力测量。比较螺旋桨在船模伴流场和使用Hoekstra法换算得到的实船伴流场中工作时激振力的预报值及桨模空泡形态，并与实桨对比，就伴流场修正对螺旋桨激振力预报的影响作了探讨。

Influence of Correction for Wake Field on Induce Ship Hull Excitation Force Prediction

Hoekstra method of wake correction, wake field simulation method in cavitation tunnel and process of induced ship excitation force measurement are introduced. The Sydney Express Propeller recommended by the 16th ITTC is taken as research object in this study. In the cavitation tunnel of SSSRI, the ship model wake field was simulated by grid mesh method, while pressure fluctuations induced by the propeller model were surveyed by 5 pressure sensors installed in a plate right above the model with a distance. The comparisons of the measured pressure fluctuation on the plate and observed cavitation patterns on the propeller model in the case of ship model wake field with that in the ease of so called simulated real ship wake field obtained by correcting the ship model wake field with Hoekstra method, also with that in prototype case are carried out. The influence of correction for wake field on induced ship hull excitation force prediction is discussed.