二元外压式进气道侧板对流场影响

为研究二元外压式进气道侧板对流场影响,采用FLUENT软件计算了有、无侧板两种方案进气道三维流场,通过对比可知安装侧板的进气道性能显著高于不安装侧板进气道性能.在此基础上,计算了有侧板进气道在来流马赫数为2.0～3.0之间的性能特性,与进气道二维流场计算结果相比,进气道三维流场中压缩气体越过侧板溢流使进气道性能下降.通过分析不同来流马赫数下溢流流动,得出了侧板溢流对进气道流场影响规律. 

Research of sidewall effect on binary external-compression inlet flow field

This article mainly researched the influence of sidewall on binary external-compression inlet flow field.The three-dimensional flow fields of two inlet cases,with/without sidewall,were studied with the commercial CFD（computational fluid dynamics） software FLUENT.The performances of the case without sidewall were much worse than the case with sidewall on a comparative basis.Therefore,the performances of the inlet with sidewall between Mach number 2.0～3.0 were studied.As compared with the inlet's two-dimensional flow fields' performances,the three-dimensional flow fields' performances declined once the compressed air passed the sidewall and leaked out.After the analysis of the leakage flow under different Mach numbers,the influence law of leakage from sidewall was induced.