基于蒙特卡罗法的三维颗粒消光模型  

Three-Dimensional Particle Light Extinction Model Based on Monte Carlo Method

作　　者：邓飞 黄茜 苏格毅 孙存金 苏明旭[1,2] Deng Fei;Huang Qian;Su Geyi;Sun Cunjin;Su Mingxu(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海市动力工程多相流动与传热重点实验室,上海200093

出　　处：《激光与光电子学进展》2024年第23期410-416,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(52376162,51976130)。

摘　　要：设计一个基于蒙特卡罗法(MCM)的三维消光模型,在三维空间中将入射光离散成光子,以Mie散射理论描述单个颗粒的散射行为,统计光子进入颗粒系统后的所有事件,实现对颗粒系统的消光谱预测。同步开展传统消光模型即Lambert-Beer(LB)模型计算,搭建消光谱测量装置对模型进行实验验证。结果表明,三维MCM模型与LB模型的均方根误差在0.003以内,与实验的均方根误差小于0.015。初步验证了三维MCM预测消光谱的可靠性,并拓展了消光法适用范围,使三维MCM模型成功应用于混合颗粒系统,并实现非平行光束入射条件下的消光谱预测。A three-dimensional Monte Carlo method(3D MCM)-based extinction model is proposed.In this model,the incident light beam is assumed to be composed of discrete photons,and Mie scattering theory is employed to describe how light scatters off individual particles.This approach enables the prediction of a particle system’s extinction spectrum by counting all events after photons enter the system.The traditional extinction model,Lambert-Beer(LB)model,is calculated simultaneously,and a measuring device is built to verify the model.The comparison shows a root mean square error of<0.003 between the results of the 3D MCM and LB model,and<0.015 between the results of the 3D MCM and experimental model.These findings confirm the predictive accuracy of 3D MCM for characterizing extinction spectrum,thus expanding its applicability to various scenarios.3D MCM model is successfully applied to the mixed particle system,and the prediction for extinction spectrum under non-parallel beam incidence is realized.

关 键 词：蒙特卡罗法 Lambert-Beer模型 三维 消光谱 

分 类 号：O433.4[机械工程—光学工程]