桨扇设计中的气动和声学优化

本文从现代先进桨扇设计的特点出发,评述了应用于螺桨风扇气动,声学设计和优化中的各种方法。从优化的观点出发,对桨扇设计参数的选择原则和参数选择对性能的影响进行了分析评述,从而指出了存在的问题和进一步发展的方向。着重强调了优化方法在桨扇设计中应用的前景和通过优化可能产生的性能改进。

AERODNYAMIC AND ACOUSTIC OPTIMIZATION IN PROPFAN DESIGN

Integrated design is the main feature of advanced propfan design. From this point of view, methods adopted for aerodynamic and acoustic design of propfan are reviewed, commentson their application in propfan optimization are made, principles of selecting design parameters, such as power loading, number of blades, blade tip speed, airfoil section and shape of nacelle, are considered. The main objects of aerodynamic and acoustic optimization and the possible performance improvements obtained from the optimization are pointed out. The optimization of the blade tip sweep should be determined from both aerodynamic and acousticconsiderations, and the factors which should be taken into account in integrated or single optimization are indicated accordingly.