合成射流用于动态失速控制的数值模拟

Numerical Simulation of Dynamic Stall Control Using Synthetic Jet

动态失速是限制相关机械或飞行器性能的重要因素,因而对动态失速控制的研究具有重要的工程意义.以二维非定常可压RANS方程为控制方程,采用Jameson中心有限体积法,对攻角作α=15°+10°sin(ωt)变化的亚音速俯仰振荡NACA 0012翼型的流场进行了数值模拟,并对合成射流在此工况下的控制效应进行初步研究,分析作动器频率、射流动量系数及作动器位置对控制效应的影响.计算结果表明,加控制后能明显地提高最大升力、减少阻力.

Numerical studies were conducted to investigate effectiveness of dynamic stall control of a synthetic jet （SJ） on a subsonic pitching NACA 0012 airfoil. The flow field is simulated by solving unsteady two-dimensional, compressible Reynolds-averaged Navier-Stokes （RANS）equations. The flow characteristics and the influence of the respective parameters of the SJ （momentum coefficient, frequency, and location） are analyzed. Numerical results indicate that SJ can be used to augment the maximum lift and reduce drag under the condition of dynamic stall.