关键词: 环形螺旋桨, 空泡分布, 空化规律, Schnerr-Sauer模型

Abstract: The toroidal propeller is a kind of novel propeller, which cavitation characteristics are not yet clear. In order to obtain the bubble distribution and cavitation characteristics of the toroidal propeller, the simulation of toroidal propeller’s cavitation characteristics is taken based on the multiple reference frames method and the Schnerr-Sauer cavitation model. The calculation results of the volume fraction of the gas phase under different rotational speeds and advance coefficients show that the cavitation laws of the front and rear edges of the toroidal propeller are very different, and the suction surface of the transition section is the most prone to cavitation. The cavitation of the front edge pressure surface always precedes the rear edge pressure surface, while the cavitation of the front and rear edge suction surfaces occurs almost simultaneously. The research results can support the further work on the noise performance and hydrodynamic performance of the toroidal propeller.

Key words: toroidal propeller, bubble distribution, cavitation characteristics, Schnerr-Sauer model