二元双喉道射流推力矢量喷管流动参数影响的数值研究  

Numerical study of a dual-throat fluidic thrust-vectoring nozzle

作　　者：李耀华[1] 李建强[1] 杨党国[1] 张诣[1] 周清展[1] 

机构地区：[1]中国空气动力研究与发展中心高速空气动力研究所,四川绵阳621000

出　　处：《空气动力学学报》2015年第2期211-217,共7页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(11272335)

摘　　要：采用数值模拟方法研究了不同流动参数对二元双喉道射流推力矢量喷管（Dual-throatfluidic Thrust-vecto-ringNozzle，DTN）内流特性和推力矢量控制效果的影响。结果表明，DTN在非推力矢量情况下，NPR在3～4范围时，推力系数较大，达到0．968，而流量系数较小，仅为0．93；NPR再增大，推力系数迅速下降。在推力矢量情况下，落压比一定时，随着次流流量比的增加，推力矢量角增加，而流量系数、推力系数、推力矢量效率减小；次流流量比一定时，随着落压比的增加，推力矢量角减小，系统推力系数先增加后减小，流量系数略微增加。Fluidic thrust vectoring technique is an advanced thrust vectoring concept, It has many potential benefits, such as light weight, control convenience, low manufacturing cost and high ratio of thrust to weight, comparing with conventional mechanical thrust vectoring tech- nique. The effects of several flow parameters on the internal flow of the dual-throat fluidic thrust-vectoring nozzle （DTN） are analyzed by numerical simulation method. The results indicate that DTN can provide high thrust vectoring efficiency with nozzle pressure ratio （NPR） of 3～4 （system thrust ratio arrives 0. 968, discharge coefficient 0.93） under non-vectoring thrust state. Increase in NPR decreases system thrust ratio rapidly. When NPR is constant, thrust angle in- creases with the increase in the secondary injection flux under vectoring thrust state. However, discharge coefficient, system thrust ratio and thrust vectoring efficiency will decrease simultane- ously. When the secondary injection flux is constant, thrust angle decreases with the increase in NPR, whereas discharge coefficient may increase lightly, and system thrust ratio first increases and then decreases.

关 键 词：双喉道 射流推力矢量 推力矢量喷管 数值模拟 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]