【作者】 李乾； 赵忠良； 王晓冰； 杨海泳； 李玉平； 马上；

【Author】 LI Qian;ZHAO Zhongliang;WANG Xiaobing;YANG Haiyong;LI Yuping;MA Shang;High Speed Aerodynamics Insititute,China Aerodynamics Research and Development Center;

【机构】 中国空气动力研究与发展中心高速空气动力研究所；

【摘要】 近空间高超声速飞行器飞行过程出现的气动/运动耦合现象导致的稳定性问题,对于机动飞行安全和操控具有重要意义。为此,通过数值模拟以及静、动态风洞试验手段,获取了一类HTV-2飞行器的静、动态气动特性,结合理论分析将飞行器的稳定性问题由静态、单自由度运动推进到两自由度动态耦合运动研究。结果表明,飞行器俯仰、滚转方向均为静态稳定的;且其动导数为负值,单自由度自由振动为衰减振动状态,表现为动稳定;但强迫俯仰/自由滚转两自由度耦合运动情况下,俯仰运动会带来导致飞行器失稳的惯性耦合作用,并在气动恢复力矩的共同作用下,决定飞行器的运动稳定性状态。更多还原

【Abstract】 It is of great significance for flight safety and maneuvering capability to study the complex stability problem of near space hypersonic vehicle caused by aerodynamic/kinematic coupled effects.Therefore,through numerical simulation and static/dynamic wind tunnel tests,a study on static and dynamic aerodynamic characteristics was carried out for the HTV-2 like vehicle.And combined with the theoretical analysis,the coupled two-degrees-of-freedom pitching/rolling motion was studied on the basis of the research on static and single-degree-of-freedom stability.The result shows that the vehicle is in static stability in pitching and rolling direction,and the motion of free vibration of single freedom shows an attenuation vibration curve which meets the fact that the vehicle is dynamic stable with negative dynamic derivative.But under the condition of forced-pitch/free-roll coupled motion with two degrees of freedom,the interaction of inertia moment brought by pitching motion and asymmetric recovery moment will decide its motion stability.更多还原