涡流发生器对Bump进气道性能影响数值研究

以一种Bump进气道为研究对象,通过在S弯扩压段入口处布置涡流发生器来控制流动分离,减小出口总压畸变。采用CFD数值计算软件对Bump进气道在设计点(Ma=2.0)与非设计点(Ma=1.8,0.8)工况下内、外流场进行计算,分析不同涡流发生器方案的效果。计算结果表明:在设计点工况下,安装涡流发生器能够抑制流动分离,改善进气道流场品质,减小出口总压畸变；在一些非设计点工况下会增大Bump进气道出口总压畸变；Bump进气道总压损失有所增大,不同叶片间距的涡流发生器对总压损失的影响相当。 

Numerical investigation of effect of vortex generators on Bump inlet performance

To control the flow separation and effectively reduce outlet total pressure distortion of a S-shaped duct Bump inlet, vortex generators (VGs) were designed and installed at the entry of the S duct.The commercial CFD software was used to simulate the internal and external flow fields at the design point (Ma=2.0) and off design points (Ma=1.8,0.8), and predict the effectiveness of VGs with different parameters.The simulation results indicate that,VGs installation can suppress flow separation and remarkably reduce the total pressure distortion at exit of Bump inlet at design point.At some off design points,it can increase the total pressure distortion at exit of Bump inlet.It can slightly increase the total pressure loss.And VGs with different vane distance make a similar influence on the total pressure loss.