(Note: This paper was published on Aircraft Engineering, No.2, 1995, sponsored by No. 603 Research Institute, Aviation Industries of China. It is also included in Advances in Design Aerodynamics, Vol. 1, State Key Laboratory of Aerodynamics of Airfoil and Cascade, 1995.)

Zhide Qiao, Bowen Zhong, Zhou Ji

(Northwestern Polytechnical University, Xi'an, 710072, China)

Abstract

Based on the methods for advanced airfoil design and contra-rotating propeller design, a new integrated design method has been developed for low noise contra-rotating propellers. In the method an iterative design process of airfoil and propeller is adopted in order to obtain high efficiency as well as satisfactory cavitation number at each radial station according to the cavitation property of the airfoils. To avoid or reduce the occurrence of cavitation on the surface, the noise of the propellers is decreased. The method is applied to a certain model of contra-rotating propellers.

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