摆线推进器任意方向角的水动力计算方法研究

The research on the method for calculating the hydrodynamic performance of cycloidal propeller at arbitrary direction angle

本文提供了一个能够在任意方向角状态下计算摆线推进器水动力性能的方法。该方法是以朱典明和谷口中所用方法为基础,用“弯曲流管”代替“单向流管”,将摆线推进器抽象为斜向作用盘,在斜向作用盘的作用下,产生斜向诱导速度,使水流方向发生改变。通过这样一个模型建立水动力方程,并在相互垂直的两个方向应用动量定理,得到诱导速度计算公式,然后,通过数值迭代求解,计算出摆线推进器在任意方向角状态下的水动力特性。应用本文方法对NSRDC摆线推进器在进速系数J>0,方向角β=-90°^+90°范围内进行了计算,其计算结果与实验结果吻合比较好。

In this paper a method is developed to calculate the hydrodynamic performance of cycloidal propeller at arbitrary direction angle, This method based on the method of D. M. Zhu and Taniguchi. In this method bend stream-tube is used to the single stream-tube. Regarding the propeller as a skew actuator. Under the function of skew actuator, produce the induced velocity of skew direction and make water current direction change. With this method , the momentum theorem at tow direction is used and for this model gets the induced velocity. At last, we can get the performance of cycloidal propeller at arbitrary angles by the iterative method. With the method the performance of NSRDC cycloidal propeller is calculated when J〉0 and βis between-90° to ＋90°. And calculated results match well with experimental results.