| 火箭尾喷焰红外辐射特性的理论计算 |
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| 引用本文： | 褚宏伟,许小剑.火箭尾喷焰红外辐射特性的理论计算[J].红外与激光工程,2012,41(1):10-14. |
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| 作者姓名： | 褚宏伟 许小剑 |
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| 作者单位： | 1.北京航空航天大学 电子信息工程学院,北京 100191 |
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| 摘 要： | 尾喷焰是一种高温高压气体，向空间辐射较强的热辐射能，对飞行器的隐身性能有重要影响。为计算尾喷焰的红外辐射特性，首先基于Navier?鄄Stokes方程和其他控制方程，在对流场进行划分处理的情况下得到了整个流场的特性分布，包括温度、压力和各气体组分参量等。在此基础上，考虑谱线的碰撞展宽效应和多普勒展宽效应，计算了尾喷焰中包含各气体的谱带模型参数，如吸收系数、谱线间隔密度和谱线半宽等。最后，利用非均匀气体的Curtis?鄄Godson近似，仿真计算了某火箭尾喷焰在2~5 m谱段的红外辐射光谱强度，仿真结果验证了所用方法的正确性。
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| 关 键 词： | 尾喷焰 红外辐射特性 谱带模型参数 |
Theoretical computation of the infrared radiation from rocket plume |
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| Chu Hongwei,Xu Xiaojian.Theoretical computation of the infrared radiation from rocket plume[J].Infrared and Laser Engineering,2012,41(1):10-14. |
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| Authors: | Chu Hongwei Xu Xiaojian |
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| Affiliation: | 1.School of Electronics and Information Engineering,Beihang University,Beijing 100191,China |
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| Abstract: | Aircraft plume is a kind of high temperature and high pressure gas,which will lead to strong radiation energy into the space and have a great influence on aircraft stealthy performance.To compute the infrared radiation signature of plume,firstly based on the Navier-Stokes equation and other governing equations,the characteristics of the whole flow field were calculated under the division of flow field,including the temperature,pressure and composition of each gas.Then,the band model parameters of the gases contained in the plume,such as spectral line absorption coefficient,interval density and half width,were computed by using both the Collided-broaden effects and the Doppler-broaden effects of the spectrum.Finally,by use of the Curtis-Godson approximation of non-uniform gas,the infrared radiation intensity of a rocket plume from the wavelength of 2 to 5 μm was computed,and the results of simulation validate the correctness of this method. |
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| Keywords: | plume infrared radiation characteristic band model parameter |
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