发动机喷流对体襟翼干扰特性的数值模拟  

Numerical Simulation of the Engine-Jets Interaction with Body Flap

作　　者：刘杰平[1] 杜志博 蔡巧言[1] 王飞[1] 吕俊明[2] 程晓丽[2] LIU Jie-ping;DU Zhi-bo;CAI Qiao-yan;WANG Fei;LYU Jun-ming;CHENG Xiao-li(China Academy of Launch Vehicle Technology,Beijing 100076,China;China Academy of Aerospace Aerodynamics,Beijing 100074,China)

机构地区：[1]中国运载火箭技术研究院,北京100076 [2]中国航天空气动力技术研究院,北京100074

出　　处：《气体物理》2019年第3期11-16,共6页Physics of Gases

摘　　要：出于俯仰配平控制需求,面对称飞行器通常会在力臂最长的尾端面布置气动控制面——体襟翼.由于体襟翼与发动机喷管距离较近,因此,极易受到发动机喷流干扰.该干扰力虽远小于发动机推力,但其力的作用方向垂直于体襟翼,力臂明显更长,导致喷流干扰所产生的俯仰力矩相对发动机推力所产生的俯仰力矩而言并非小量,甚至给飞行器控制造成不利影响.文章通过数值求解多组分N-S方程,分析了发动机与体襟翼之间的喷流干扰流场机理,发现了该喷流干扰力特性在低空低速和高空高速截然相反的原因.For the need of pitch balancing control,the body flap is usually arranged on the base of the plane symmetry aircraft with the longest moment arm.Due to the close distance between the body flap and the engine nozzle,the body flap is easily disturbed by the engine jet.Although the interference force is far less than the thrust of the engine,its direction is perpendicular to the body flap,and the moment arm is significantly longer.As a result,the pitching moment generated by the jet interference is not small as compared with the pitching moment generated by the thrust of the engine,and even adversely affects the control of the aircraft.By solving the multi-component N-S equation numerically,the mechanism of jet interference flow field between the engine and body flap was analyzed,and the reason why the jet interference characteristics are completely opposite at low altitude and high altitude was found.

关 键 词：面对称飞行器 发动机 体襟翼 喷流干扰 数值模拟 

分 类 号：V211.6[航空宇航科学与技术—航空宇航推进理论与工程]