二维合成射流组合效应的数值研究

Numerical simulation of arrayed synthetic jets in planar flow field

采用数值模拟的方法,研究了一列合成射流对二维平板流动壁面的影响,对合成射流组合效应进行了分析。结果表明:在不同的开孔角度和振动相位下,合成射流组合效应明显,对壁面平均剪切应力改变显著,最大变化约15%,对壁面压力改变较小,最大变化约0.5%,;对于流场壁面压力和剪切应力分布,斜开孔比直开孔改变要大,异相位射流比同相位射流改变要大;异相位振动模式下,壁面平均压力和剪切应力值波动较小,变化比较平稳。

Two-dimensional arrayed synthetic jets are modeled with dynamic mesh. Simulations are performed to characterize the behavior an arrayed jets with different angle of the orifice and actuating mode of piston oscillations. The detailed unsteady flow physics of the arrayed synthetic jets are explored via instantaneous and averaged wall static pressure and wall shear. It is found that arrayed synthetic jets change the distributing of wall static pressure and wall shear, the max. Variety of wall average static pressure and wall average shear are corresponding 0.5 % and 15 %, the changes of wall static pressure and wall shear are more in inclined orifice and asynchronous oscillations, and the fluctuation of them are less in asynchronous oscillations.