超临界翼型的双射流环量控制研究

Circulation control of double jet flow on supercritical airfoil

为了研究双射流环量控制对超临界翼型气动特性的影响规律和作用机理,采用基于雷诺平均N-S方程数值计算方法进行了气动特性计算和流场分析。分别研究了双射流口按不同动量系数大小和比例吹气对翼型气动特性和流场特性的影响。结果表明:双射流环量控制相对于单射流能够有效提高升阻比,同时升力系数随射流动量系数的增大而增大,表现出两个明显的线性阶段变化规律;通过调节上下射流口动量系数的比例,能够实现操纵力矩的改变;同时,当双射流动量系数的比例维持在较低水平时,翼型的升阻比较大。

In order to study the influence law and action mechanism of double jet circulation control on aerodynamic characteristics of supercritical airfoil,aerodynamic characteristics calculation and flow field analysis are carried out based on the numerical calculation method of Reynolds average N-S equation.The effects of different jet momentum coefficient and the ratio of momentum coefficient of upper and lower jet on airfoil aerodynamic characteristics and flow field characteristics were studied.The results show that the double jet circulation control can effectively improve the lift-drag ratio compared with the single jet.The lift coefficient increases with the increase of jet momentum coefficient,showing two obvious linear phase variation rules.By adjusting the ratio of momentum coefficients of upper and lower jets,the control torque can be changed.At the same time,when the ratio of the momentum coefficient of the upper and lower jet ports is low,the lift and drag of the airfoil is relatively large.