螺旋桨扰动速度场数值预报

本文给出了螺旋桨周围流场的预报方法及其数值计算结果。本方法以具有涡分布和源汇分布的升力面来构造螺旋桨对流场的状动。升力面取奖叶拱弧面。根据桨叶表面流动不穿透条件解出升力面奇点后，然后再求它们对流场的扰动。敞水螺旋桨的脉动速度计算结果与试验结果吻合良好。

NUMERICAL PREDICTION OF THE PERTURBATION VELOCITY FIELD AROUND A PROPELLER

A numerical method used for the velocity prediction of the flow field around a propeller is presented, in which the propeller perturbation effect to the flow field is represented by a lifting surface, located on the camber surface of the propeller blade, with a vortex and source distribution on it. After the vortex distribution is solved according to the boundary condition of no-flow-penetrating through the blade surface, the velocity reduced by the propeller can be calculated. Agreement between the numerical results of reduced velocity around an open-water propeller and the measurements is satisfactory.