CAJ | 학술논문

在红外末制导导弹高速飞行过程中，侧窗与大气产生剧烈摩擦，引起气动加热效应。随着导弹速度的提高，气动加热对探测性能的负面影响越来越明显。针对这一问题，对超音速导弹导引头平板侧窗的喷流技术的进行了理论建模；采用计算流体动力学（CFD）仿真的方法，分析了侧窗外表面的气动热流场变化；探讨了通过对侧窗外表面进行喷流的措施改变温度场分布的技术。研究结果表明：该技术能够有效地降低侧窗气动热影响，抑制红外成像热背景干扰，提升了导引头在高速飞行过程中的探测性能。
재홍외말제도도탄고속비행과정중，측창여대기산생극렬마찰，인기기동가열효응。수착도탄속도적제고，기동가열대탐측성능적부면영향월래월명현。침대저일문제，대초음속도탄도인두평판측창적분류기술적진행료이론건모；채용계산류체동역학（CFD）방진적방법，분석료측창외표면적기동열류장변화；탐토료통과대측창외표면진행분류적조시개변온도장분포적기술。연구결과표명：해기술능구유효지강저측창기동열영향，억제홍외성상열배경간우，제승료도인두재고속비행과정중적탐측성능。
In the process of high-speed flight of infrared terminal guidance system, -aerodynamic heating effect occurs because of severe friction between the side window and atmosphere. With the flight speed increasing, the negative effect on the detection capability of the system is worse. In the paper, a theoretical model is proposed to solve the problem, which is then utilized to describe cavity injection technology of side window in supersonic missile seeker. And then, the computational fluid dynamic (CFD) simulation is used to analyze the variety of heating effect on the external surface of side window. Lastly, this paper discusses a technique of side window jet in detail. Using the technique, the head temperature field distribution is obtained though jet on the external surface of side window. The results of the experiment show that the technique can effectively reduce the effect of side window aerodynamic heating, and suppress the infrared background clutter, improving the detection capability of the seeker in high-speed flight.