论文部分内容阅读
给出了在进气道内加装格栅对进气道的气动性能和电磁散射特性的影响。结果表明，格栅明显地降低了Ｓ弯进气道出口二次旋流，且使原始单涡旋流消失，出口流场畸变度减小，进气道的雷达散射截面值显著降低，但同时也降低了进气道出口截面上的平均总压恢复系数。还给出了格栅几何尺寸的影响，及设计中如何选择格栅尺寸。
The effect of adding a grille on the aerodynamic performance and electromagnetic scattering characteristics of the inlet duct is given. The results show that the grille significantly reduces the secondary swirl flow at the outlet of S-bend inlet, and the original single-vortex vortex disappears, the distortion of outlet flow field decreases and the radar cross-section value of inlet decreases significantly, meanwhile, It also reduces the average total pressure recovery factor at the inlet cross-section. Also given the impact of the grid geometry, and how to choose the design grid size.