单微射流作动器控制主流参数分析

Parameters Analysis of Vectoring the Primary Flows Using Single Micro-jet Actuator

采用改进的Beam-Warming近似因式分解法求解二维、粘性、非定常、可压全N-S方程,对单微射流作动器定向控制主流的合成流场进行数值模拟。分析了主流和微射流作动器之间距离、微射流的入射角度、微射流的最大出口速度及压电薄膜驱动频率对主流偏转程度的影响。其中入射角的影响最为显著,在入射角为负值(即微射流流向主流方向)时,主流被“推”向另一侧,成功模拟了文献[2]中关于微射流对主流“推”的现象。微射流的参数在一定的范围内对主流偏转程度影响非常显著,而超出此范围,其影响将大为减小。

The full N-S equations are solved using Beam - Warming approximate factorization method for the synthetic flow field of Vectoring of a primary jet with micro-jet. The synthetic flow field is compressible, two dimensional, time-dependent, as well as viscous. The numerical simulation result shows the primary jet can be vectored and leaned to the micro-jet actuator as “pull” mode. The parameters of micro-jet effecting on the vectoring angle the primary, the distance from the micro-jet actuator to the primary, an angle of incidence, frequency, velocity and altitude are analyzed. The effect of an angle of incidence is larger than that of others. When an angle of incidence is minus, the primary jet is pushed to the other side. When the parameters are beyond the region, the vectored angle of the primary is smaller.