玫瑰扫描光学系统头罩气动热建模与仿真
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摘要
在导弹高速飞行过程中,光学头罩的温度受气动热效应作用而急剧升高,会产生严重的气动热辐射效应。为研究头罩气动热对玫瑰扫描光学系统的影响,建立了基于CFD流体仿真软件的头罩温度场模型。在仿真软件对光学系统结构进行三维建模后,通过光学软件对头罩热辐射对探测器的影响进行了仿真和计算。仿真结果表明:玫瑰扫描光学系统对头罩的温度梯度较为敏感,当头罩温度非均匀分布时,探测器会接收到气动热辐射干扰信号,对弱小目标的正常探测和提取产生干扰,气动热辐射效应不容忽视。
The temperature of the optical dome rises rapidly due to aerodynamic heating,and causes severe thermal radiation effects to the missile flying at a high speed.To study how aerodynamic heating influences optical system,a model describing temperature field of dome is built based on CFD fluid simulation software,and a 3-dimentional modeling of the optical system based on software is given.Simulation and calculation are done to learn how the aerodynamic heating influences on detector based on optical software.The simulation result indicates that a rosette scan system is sensitive to the temperature grads of the dome.The interference signal of aerodynamic heating radiation can affect dim and the detection and recognition of small target,with the non-uniformly distributed of the dome.Therefore,the effect from aerodynamic heating cannot be neglected.
The temperature of the optical dome rises rapidly due to aerodynamic heating,and causes severe thermal radiation effects to the missile flying at a high speed.To study how aerodynamic heating influences optical system,a model describing temperature field of dome is built based on CFD fluid simulation software,and a 3-dimentional modeling of the optical system based on software is given.Simulation and calculation are done to learn how the aerodynamic heating influences on detector based on optical software.The simulation result indicates that a rosette scan system is sensitive to the temperature grads of the dome.The interference signal of aerodynamic heating radiation can affect dim and the detection and recognition of small target,with the non-uniformly distributed of the dome.Therefore,the effect from aerodynamic heating cannot be neglected.
引文
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[2]殷兴良.气动光学原理[M].北京:中国宇航出版社,2003:194-196.YIN X L.Principle of Aero-optical[M].Beijing:China Astronautic Publishing House,2003:194-196(in Chinese).
[3]薛文慧.气动热环境下共形整流罩热辐射特性研究[D].哈尔滨:哈尔滨工业大学,2016.XUE W H.Research on the thermal radiation characteristics of conformal dome in the aero-dynamic environment[D].Harbin:Harbin Institute of Technology,2016(in Chinese).
[4]RAINE K W,PENFOLD A B.An instrument for measuring the thermal coefficient of refractive index in the infrared[J].Journal of Physics E:Scientific Instruments,1985,18(7):593-597.
[5]范志刚,于翠萍,肖昊苏,等.气动光学头罩热辐射效应数值仿真研究[J].应用光学,2012,33(4):649-653.FAN Z G,YU C P,XIAO H S,et al.Numerical simulation of thermal effect about optical dome in aerodynamic thermal environment[J].Journal of Applied Optics,2012,33(4):649-653(in Chinese).
[6]耿利祥.复杂环境下光电目标探测若干关键技术研究[D].南京:南京理工大学,2016.GENG L X.Research on the key techniques of photoelectric target detection under the complex environment[D].Nanjing:Nanjing University of Science&Technology,2016(in Chinese).
[7]史小伟,许小剑.背景辐射对拦截器导引头探测性能的影响分析[J].系统工程与电子技术,2010,32(10):2053-2056,2085.SHI X W,XU X J.Impact of background radiation on the detection performance of interceptor seekers[J].Systems Engineering and Electronics,2010,32(10):2053-2056,2085(in Chinese).
[8]刘锋,唐晓峰.超声速氟化镁红外头罩热强度失效判别准则研究[J].上海航天,2014,31(3):39-42,47.LIU F,TANG X F.Study on thermal strength failure criterions for supersonic infrared MgF2missile dome[J].Aerospace Shanghai,2014,31(3):39-42,47(in Chinese).
[9]CROSS E F.Window-heating effects on airborne infrared system calibration[J].SPIE,1992,1762:576-583.
[10]肖昊苏,陈澄,姚睿,等.复杂热环境下蓝宝石共形头罩气动热效应研究[J].现代防御技术,2015,43(4):13-18.XIAO H S,CHEN C,YAO R,et al.Research on aerodynamic heating of conformal sapphire dome in complicated thermal environment[J].Modern Defense Technology,2015,43(4):13-18(in Chinese).