背景对高超声速飞行器探测的影响

Background Influence on the Hypersonic Vehicle Detection

为了探索背景对临近空间高超声速飞行器探测性能的影响,研究地面、云层和海洋三种背景下的红外作用距离。针对传统作用距离模型的不足,根据探测的几何关系及路径辐射,对其进行改进。基于空气动力学、加力燃烧原理、尾焰简化模型,计算X-51A蒙皮、喷管及尾焰红外辐射。综合自然环境的影响,建立3种背景的红外辐射模型。仿真表明,速度为6 Ma时,3种背景下的探测距离差别不大。飞行速度越大,背景对探测距离的影响越小。结论指出,高超声速飞行时,可以忽略背景的影响。

The infrared operating range was estimated for the hypersonic vehicle in the ground/cloud/sea background for their influence on the detectability.The modified operating range model was built on basis of the detection geometry as well as the path thermal.The infrared radiation characteristics computation model of X-51A’s skin,nozzle and plume were given on basis of aerodynamics,afterburning theory and simplified plume model.The infrared radiation in the ground/cloud/sea background was computed.It showed in simulations that the operating ranges in three typical backgrounds differed slightly at 6Ma.And the effects of the background on the operating range were smaller with higher speed.It is inferred that the detection background can be ignored with very high velocity.