煤粉燃烧颗粒粒子云辐射特性的研究
发布时间:2019-06-07 08:45
【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%。
[Abstract]:The radiation characteristics of carbon particles and fly ash particle clouds in pulverized coal furnace measured by 560nm are analyzed. Based on Mie theory, the radiation characteristics of particle clouds at the outlet of the burner and the upper part of the furnace are calculated respectively. it is found that the carbon particles have a great influence on the overall radiation weakening coefficient of the particles in the outlet area of the burners, accounting for more than 90%. In the upper part of the furnace, the influence of fly ash is greater. It can be seen from the numerical results that the scattering rate of fly ash particle cloud is as high as 91.6%, and the scattering effect of fly ash particle cloud is stronger than that of absorption, while the scattering rate of carbon particle is only 50%.
【作者单位】: 浙江大学能源工程学院;
【基金】:国家自然科学基金项目(512761615)资助
【分类号】:TM621.2
本文编号:2494665
[Abstract]:The radiation characteristics of carbon particles and fly ash particle clouds in pulverized coal furnace measured by 560nm are analyzed. Based on Mie theory, the radiation characteristics of particle clouds at the outlet of the burner and the upper part of the furnace are calculated respectively. it is found that the carbon particles have a great influence on the overall radiation weakening coefficient of the particles in the outlet area of the burners, accounting for more than 90%. In the upper part of the furnace, the influence of fly ash is greater. It can be seen from the numerical results that the scattering rate of fly ash particle cloud is as high as 91.6%, and the scattering effect of fly ash particle cloud is stronger than that of absorption, while the scattering rate of carbon particle is only 50%.
【作者单位】: 浙江大学能源工程学院;
【基金】:国家自然科学基金项目(512761615)资助
【分类号】:TM621.2
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