动态细水雾的最佳热辐射消光粒径  

Optimal heat radiation extinction diameter of dynamical fine water sprays

作　　者：杜永成[1] 杨立[1] 张文勇[2] 

机构地区：[1]海军工程大学动力工程学院,武汉430033 [2]空军航空大学飞行训练基地,哈尔滨150111

出　　处：《强激光与粒子束》2013年第9期2413-2417,共5页High Power Laser and Particle Beams

基　　金：国防预研基金资助项目(1010502020202)

摘　　要：研究了细水雾遮蔽衰减热辐射过程中,取得最佳遮蔽效果的动态雾滴初始粒径问题。综合考虑雾滴的光学特性和动力学特性,定义了热遮蔽指数作为度量动态雾滴消光能力的指标。在模型构建中,用索特粒径将多分散性的细水雾等效成单分散系;用Planck平均法获取水雾的灰体辐射特性参数;并采用数组调用、线性插值的方法提高大量计算Mie氏消光因子的效率。研究发现,基于遮蔽指数的最佳消光粒径要远大于基于光学特性的最佳消光粒径。A problem about the optimal extinction diameters of fine water sprays for thermal radiation shielding is researched.Considering the optics and dynamics properties of the sprays droplets,the index of thermal shielding is defined as a criterion to measure the extinction capability of dynamical droplets.The polydisperse sprays are equal to monodispersion with Sauter diameter in the model construction.The Planck meaning method is used to obtain the radiative property parameters of sprays taken as grey body.The massive sums of repeat calculating of Mie efficiency factors are avoided by adopting the method of data invoking which are calculated and saved in an array in advance and linear interpolation.According to the evaluation method defined in this paper,the optimal extinction diameters obtained based on thermal shielding index are far greater than that obtained based on the optics properties.

关 键 词：细水雾 消光粒径 热遮蔽 辐射特性 动力特性 

分 类 号：TN21[电子电信—物理电子学]