尖晶石整流罩气动效应的试验研究

超音速导引头整流罩的气动光学效应对红外光电成像系统的跟踪、识别产生很大的影响。结合工程实际,主要开展了在6 km高空、飞行速度达到2.4 Ma的尖晶石整流罩的气动力学、气动光学效应的研究。首先,对设计的尖晶石整流罩进行了流场气动效应的仿真计算分析,并采用电弧风洞模拟试验进行了研究。接着根据试验结果,设计了尖晶石的热冲击试验,通过在尖晶石外表面镀制金刚石保护膜,实现了整流罩的消热设计。采用静态保温加热试验,研究了整流罩的气动加热对导引头跟踪成像的影响。最后,采用火箭橇模拟试验,研究了约2 Ma音速飞行的导引头的跟踪成像。初步分析了气动效应对尖晶石整流罩物理性能以及中波红外成像的影响。

Experimental research of aerodynamic effects of spinel domes

The aerodynamic optical effects of a supersonic dome will make great effect on the tracking and recognizing of the infrared imaging system.According to the requirement of a project,the pneumatic and aerodynamic optical effects of a spinel dome were studied with flight speed of 2.4 Ma at elevation 6 km.Firstly,based on aerodynamic optical model simulation results of a spinel dome,an arc wind tunnel experiment was made in order to study the aerodynamic effects of flow field.Secondly,a thermal shock experiment of a spinel circle plate was made to prove that applying the diamond protective coating to an external wall of a spinel dome could strengthen the spinel mechanical intensity and reduce aerodynamic optical effects obviously.Subsequently,an experiment of heating a spinel dome on the ground was made successfully.Finally,a rocket sled experiment of middle-infrared seeker was accomplished to study the aero-optical effects with flight speed at about 2 Ma.The effect of aerodynamic effects on physical properties and imaging quality were discussed initially.