某型无人机S型进气道流动特性研究

Study on Flow Characteristic of S-duct Inlet of a UAV

通过数值模拟研究了某无人机S型进气道,探讨了该型进气道在各种攻角和侧滑角下的流动情况。经过研究发现,此无人机S型进气道内部流动易分离,且随着攻角和侧滑角的变化,该进气道出口的气流流动更容易分离,旋流畸变很大,得出该S型进气道有抗攻角和侧滑角能力较小的特点。

According to numerical simulation, the S-duct inlet of a UAV is studied in the paper, and the flow situations of S-duct inlet with different working conditions are discussed. It is found that the inner flow in S-duct inlet is easy to separate, and the outlet flow is easier to separate with the variation of attack angle and slip angle, which causes big swirl distortion. So the S-duct inlet has lesser capability of anti attack angle and slip angle.