宽速域飞翼布局后缘射流滚转控制研究

Roll control study of flying wing based on trailing-edge jet at wide speed range

采用数值模拟方法对宽速域(Ma为0.145~0.7)内飞翼布局采用后缘环量控制射流进行滚转控制开展系统研究,并与传统舵面控制构型进行对比。研究关注电磁隐身特性、滚转控制特性和相关流动机理,以及射流引气的综合影响。结果表明:随马赫数的增大,射流对边界层流动的夹带和阻滞效应减弱,滚转控制能力显著下降;但射流控制大幅提高了典型角域的电磁隐身特性,并且引气量少,推力损失小,控制效率因子(单位附加阻力系数产生的控制力矩系数)高。综合来看,后缘环量控制射流是一种极具潜力的飞翼布局滚转控制设备。

The numerical simulation method was used to carry out a systematic study on the roll control of the flying wing using the trailing-edge CC(circulation control)jet at a wide speed range(Ma为0.145~0.7),and was compared with the configuration controlled by classical control surfaces.Research focuses the electromagnetic stealth characteristics,the roll control characteristics and their flow physics,and the impacts of the bleed air.Results show that as the Mach number increases,the roll control capability of the CC jet decreases due to the weakening of entrainment and blocking effects.However,the CC jet enhances the stealth performance at specific azimuth ranges remarkably.Moreover,it requires less bleed air,induces less thrust loss,and has a high control efficiency factor(aerodynamic moment coefficient produced per unit of additional drag coefficient).In conclusion,the trailing-edge CC jet is a highly promising roll control device for a flying wing.