侧风条件下短舱进气道地面涡数值模拟

Numerical Simulation of Ground Vortex of Nacelle Inlet Under CrosswindConditions

通过数值模拟方法,对侧风条件下短舱进气道地面涡的形成及发展情况进行了研究。通过改变侧风风速的大小,分析了侧风风速大小对地面涡形成的影响及其对进气道出口截面流场的影响。结果表明,侧风条件下,短舱进气道易形成地面涡,且伴随有尾涡的出现;随着风速大小的增加,地面涡的强度先增大后减小,地面涡的位置、结构也会发生变化;所形成的地面涡强度越大,其对进气道出口截面流场的影响就越大,但由于地面涡在进气道内的发展,地面涡对进气道出口截面流场的影响相对较小。

The formation and development of ground vortex in nacelle inlet under crosswind conditions are studied by numerical simulation.By changing the crosswind speed,the influence of the crosswind speed on the ground vortex and its influence on the flowfield of the inlet outlet are obtained.The results show that under the conditions of crosswind,the ground vortex is easy to form,which is accompanied by the tail vortex.With the increase of crosswind speed,the intensity of the ground vortex first increases and then decreases,and the location and structure of the ground vortex also change.The greater the intensity of the ground vortex,the greater its influence on the flowfield of the inlet outlet.However,due to the development of the ground vortex in the inlet,the influence of the ground vortex on the flowfield of the inlet outlet is relatively small.