带风扇叶片的短舱进气道地面涡数值仿真

Numerical Simulations on Nacelle Inlet Ground Vortex with Blades

为了研究短舱进气道在加入真实叶片后地面涡的发展规律,针对缩比的短舱进气道模型,分别在不同的侧风滑跑条件下对不同的短舱进气道模型进行三维流场定常数值仿真研究,给出了不同状态下流场涡量和总压分布云图,分析了来流条件和距地面高度对短舱进气道地面涡的影响。研究结果表明:侧风条件下,短舱进气道的总压恢复系数会随着侧风速度的增加而降低,同时也会随着距地面高度的增加而增加;相同条件下,纯侧风的地面涡强度最大,而无风滑跑状态的地面涡强度最小。

In order to investigate the development of the ground vortex after being equipped with blades,3 D numerical simulations on scaled nacelle inlet models were conducted under different crosswind conditions. The vorticity field and total pressure field under different conditions were obtained. This study analyzed the influence of the crosswind condition and the height between the nacelle and the ground on the ground vortex. The results show that the total pressure recovery decrease with increasing the crosswind velocity,however,the total pressure recovery will increase with the increasing height between the nacelle and the ground. The ground vortex strength under crosswind is much higher than the situation under no wind condition.