一种可任意给定环量分布的螺旋桨设计方法

提出了一种螺旋桨快速设计方法，该方法可以根据任意给定的环量分布及工况快速设计出高效率螺旋桨的几何外形（桨叶弦长、扭转角分布）。为对比有叶素阻力与无叶素阻力的最佳环量分布形式，首先对计入和不计叶素阻力下的最佳环量分布表达式进行了推导，分析了各参数对最佳环量分布形状的影响。然后基于片条理论进行了逆向推导，建立了以环量分布为输入的螺旋桨快速设计方法，并分析了螺旋桨理想效率的影响因素，发现理想效率的水平与来流动压、桨盘载荷有关。最后进行了螺旋桨设计实践，对比分析了不同环量分布下螺旋桨性能的差异。结果表明，所提出的设计方法能够根据给定环量分布进行精确设计，相对误差不超过7%，设计性能与参考文献中设计结果的差别不超过2%。 

A design method for propeller with arbitrary circulation distribution

A design method for high efficiency propeller with arbitrarily given circulation distribution and operating condition was presented to calculate the geometric characteristics of the propeller, including the chord length and twist angle. For comparison of the best circulation considering or disregarding the drag of the blade element, the expressions of the two best circulations were derived respectively, and the parameters influences on the best circulation distribution were analyzed. Then the propeller design method was derived inversely from the blade element momentum theory. The study on the parameter influences for efficiency shows that the ideal efficiency is closely related to dynamic pressure and disk loading. At last, several propellers were designed with different circulations and their performances were compared. The study indicates that the design method can be used to design high efficiency propeller with arbitrary circulation, at a relative error less than 7%, and the difference of design performance from the design result in the reference literature is less than 2%.