一种槽道式处理机匣的准定常流动模型Ⅱ: 跨声转子处理机匣的优化设计

对带气室的槽道式处理机匣的结构进行了参数化,然后采用所发展的处理机匣流动模型对槽道式处理机匣进行了数值模拟分析,获得了槽道式处理机匣各主要结构参数对处理机匣扩稳作用和转子效率的影响.基于原基准处理机匣,并选取各个结构参数经分析得到的最优值设计了一个优化的处理机匣.实验结果表明：优化的处理机匣设计在60%,80%,98%设计转速下都在原基准处理机匣的基础上进一步提高了转子的失速裕度,并且带有优化处理机匣的转子峰值效率比基准处理机匣、甚至实壁机匣的情形都有所提高.另外,为考察处理机匣槽道数的影响,对一个在优化处理机匣的基础上缩减槽道数而得到的处理机匣设计也进行了实验研究.

Quasi-steady flow model of slot-type casing treatments Ⅱ： design optimization of casing treatment for a transonic rotor

A geometrical parameterization method for the slot-type casing treatment was presented.The relation between a set of key geometrical parameters and the casing treatment performance was obtained based on the numerical simulations of the slot-type casing treatments using the developed quasi-steady casing treatment flow model.Then,an optimized casing treatment was obtained based on the previously designed baseline casing treatment and by the selection of the optimal geometrical parameters.The subsequent experiment shows that the optimized casing treatment can further improve the stall margin over that using the baseline casing treatment.Moreover,the rotor peak efficiency using the optimized casing treatment is also improved the speeds of at 60%,80% and 98% as compared to that of the baseline casing treatment case and even the solid built.Additionally,to investigate the effect of the number of slots,the experimental study of a casing treatment which was the same as the optimized one but with different slot number was also performed.