摘要
为了高效计算固体火箭尾焰中粒子的红外辐射规律,基于MIE散射理论建立了辐射特性计算模型,并研究了Al2O3粒子复折射率的计算方法和尾焰中固体粒子尺寸分布律计算模型。并利用上述模型,仿真分析了典型条件下Al2O3粒子的辐射参数。结果表明在仿真条件下尾焰中固体粒子辐射特性主要取决于散射特性,并随粒径增大散射相函数方向性明显增强。最后,利用建立的模型计算了典型条件下某型固体火箭尾焰的红外辐射特性,并通过与权威文献结果对比验证了模型合理性。
With the purpose of calculating the infrared radiation parameters of particles in rocket plume efficiently,a practical method is built based on the MIE scatting theory.A practical calculation method of the complex refractive index of Al2O3 particles is proposed,the models for the calculation of particles diameter′s distributing rule is post.Based on those models,the radiation parameters of Al2O3 particles and the infrared radiation characters of a solid rocket plume are calculated.The results show that the radiation characteristics of solid particles in the plume mainly depend on the scattering characteristics under the simulation conditions.In addition,the directivity of the scattering phase function increases obviously with the increase of particle size.At the end,on the bases of this model,the infrared radiation characteristics of a solid rocket exhaust plume under typical conditions are simulated and analyzed,and the feasibility of the model is verified by comparing with the results of authoritative literature.
作者
刘尊洋
丁锋
叶庆
LIU Zun-yang;DING Feng;Ye Qing(Electronic Countermeasure Institute of Nation University of Defense Technology,Hefei 230037,China)
出处
《激光与红外》
CAS
CSCD
北大核心
2020年第3期315-318,共4页
Laser & Infrared
基金
安徽省自然科学基金项目(No.1908085QF295,No.1908085MF199)资助。
关键词
火箭尾焰
固体粒子
红外辐射
参数计算
rocket plume
solid particles
infrared radiation
calculation of characters
