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本文在机匣处理设计中对关键级与危险截面、机匣处理与扩稳、弯槽与直斜槽进行了一些研究。发现各国对关键级与危险截面的判定不一。机匣处理的作用在于消除堵塞,提高叶排临界攻角,减小下一叶排近壁面攻角,扩大了压气机稳定工作范围。弯槽吸收了直斜槽和角向槽的长处,因而兼有显著的扩稳效果和较高的效率。

Discussion is given in this paper about such questions in casingtreatment, as judgement of initial stall stage andcritical section, correlation between casingtreatment and enhancing stability, and difference of straightskewed slots and curvedslots on performance influence. It is found that there aredifferent opinions andjudgement methods for initial stall stage and critical section.Casing treatment can eliminate blockage and increase criticalincidence angle of the blade row, as wellas decrease incidence near blade tip of next row.Therefore, it is main cause forenhancing stability of axial flow compressor. Thecurved slots casing treatmentpossesses advantages both straight skewed slots and bladeangle slots, so that it can enhance stability and receivehigh efficiency at the same time.