用于叶尖射流扩稳的Coanda喷嘴参数化研究

为提高压气机叶尖射流扩稳研究中喷嘴的附壁性能,采用数值方法研究了Coanda表面形式以及喷嘴宽度对Coanda喷嘴附壁性能的影响。计算结果表明:Coanda喷嘴的附壁性能与喷嘴上型线出口段的曲率密切相关,上型线出口段曲率大于1/6 mm-1时,喷嘴的附壁性能随着上型线出口段曲率的减小而提高;上型线出口段曲率减小到1/6 mm-1后,喷嘴的附壁性能不再改变。型线确定后,喷嘴的附壁性能随喷嘴宽度的增大而降低。

Paar metric Study of Coanda Injector Applied in Compressor Satb ility/Enhancement

In order to improve the injector wall attachment performance in the research of compressor sta-bility enhancement by tip injection ,the influence of Coanda surface form and injector width on the Coanda injector wall attachment performance was studied by numerical simulation .The results show that：the in-jector wall attachment performance is closely related to the curvature of the upper molded line at the out-let section,when the curvature of the upper molded line at the outlet section exceeds 1/6mm ^-1 , the Coanda injector wall attachment performance improves with the decrease of the curvature ;when the curva-ture of the upper molded line at the outlet section is lower than 1/6 mm^-1 ,the Coanda injector wall at-tachment performance is no longer change with the curvature .When the molded line is determined ,the Coanda injector wall attachment performance decreases with the increase of injector width .