介质阻挡放电对增升装置气动性能的影响

增升装置是传统构型飞机的重要组成部分,对飞行器气动性能有重要影响。将高效、简便、节能的介质阻挡放电(Dielectric Barrier Discharge,DBD)等离子体激励器布置在增升装置附近,通过对流场进行控制来达到提高增升装置气动性能的作用。选取二维翼型GAW-1及其29%襟翼作为研究对象,在分析基础流场的基础上,固定激励器放电频率等参数不变,将单级介质阻挡放电激励器放置在几个不同位置,用数值模拟的方法研究其对翼型总体气动特性的影响。仿真结果表明,主翼上表面后缘处的激励器增升效果最好,增升达12.8%且将失速迎角推迟约2°,主翼下表面后缘的升阻比增加可达15%。

Influence of DBD on aerodynamic performance of high lift system

High lift system is an indispensable part of traditional configuration aircraft,which has important aerodynamic performance of aircraft.A dielectric barrier discharge(DBD)plasma actuator near the high lift system may play a positive role in flow control with its abundant advantages such as efficient,simple and energy-saving.The GAW-1 two-dimensional airfoil and its 29%flap is chosen as an object.After analyzing the basic flow field,single pole DBD plasma actuator is arranged on several different sites with constant discharge frequency 100 Hz.The numerical simulation method is used to study the influence of the overall aerodynamic characteristics of the airfoil.The simulation results show that the actuator on the upper surface of leading edge of the main airfoil has the best lift coefficient increment of 12.8%,and the stall point can be postponed for 2°.The lift-drag ratio can be raised 15%by the actuator on the lower surface of trailing edge of the main airfoil.