煤粉燃烧颗粒粒子云辐射特性的研究  

Numerical Simulation on the Radiative Characteristics of the Particles in the Pulverized Coal Furnace

作　　者：杜锦才[1] 张海丹[1] 王飞[1] 严建华[1] DU Jin-cai ZHANG Hai-dan WANG Fei YAN Jian-hua(Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China)

机构地区：[1]浙江大学能源工程学院,浙江杭州310027

出　　处：《光谱学与光谱分析》2017年第1期217-220,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(512761615)资助

摘　　要：分析了在560nm的测量波长处煤粉炉中炭粒和飞灰粒子云的辐射特性。利用Mie理论,分别计算了燃烧器出口和炉膛的上部颗粒粒子云的辐射特性,发现在燃烧器出口区,炭粒对颗粒总体辐射减弱系数的影响较大,占90%以上;而在炉膛的上部,飞灰的影响较大。从数值计算结果中可以看出,飞灰粒子云的散射率高达91.6%,其对辐射的散射作用比吸收更强,而炭粒子的散射率仅为50%。The radiative characteristics of char and ash in the pulverized coal furnace at the wavelength of 560 nm are analyzed here.The particles’ radiative coefficients are calculated in the exit of the burner and in the upper part of the furnace separately according to the Mie theory.It can be inferred that in the exit of the burner,char has a great effect on the particles’ radiative coefficient,which accounts for a percentage of 90%.While in the upper of the furnace,ash dominates the particles’ radiative coefficient.The scattering ratio of the ash is calculated to be 91.6and the scattering ratio of the char is only 50%.

关 键 词：炭粒 飞灰 辐射系数 MIE理论 

分 类 号：O436.2[机械工程—光学工程]