变稠度串列叶栅流场试验研究

对具有大小2种稠度后排叶片的高亚声速串列叶栅进行了试验研究，其中，大稠度叶栅后排叶片稠度为小稠度叶栅的2倍，其物理位置分为前排叶片尾迹区和主流区2种，小稠度叶栅只具有尾迹区的后排叶片。研究表明:对于大稠度叶栅而言，位于尾迹区附近的后排叶片较位于主流区的负荷更高、做功能力更强；本研究的小稠度叶栅性能优于大稠度叶栅，但大稠度的叶栅出口流场相对更为均匀。此类叶栅的设计应对后排叶片的物理位置和型面进行优化，并权衡其使用环境和目的。

Experimental research of variable solidity tandem cascade performance

Experimental research is carried out on a high subsonic tandem cascade, the rear blades of which have two different solidities. For test cascade A, the number of the rear blades is double the amount of B, and there are two locations of rear blades in cascade A, which is following the wake or the mainstream of the front, while the test cascade B only have the rear blades located at the wake of the front. It can be seen from the results that for test cascade A, the load and work capacity of the blades are higher when the rear blades are located near the wake than the mainstream. The larger solidity of rear blades would lead to a blockage in the channel. But cascade B have more uniform outlet flow. Optimizations design should be done about the locations of rear blades and profiles according to the use environment and purpose.