水蒸气有效带宽计算的宽带k分布模型  

WIDE BAND k DISTRIBUTION MODEL FOR EQUIVALENT LINE WIDTH OF WATER VAPOR

作　　者：尹雪梅[1] 刘林华[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001

出　　处：《工程热物理学报》2008年第5期868-870,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.50636010;No.50425619)

摘　　要：本文在计算吸收系数几率分布函数时引入普朗克函数加权,建立了一种新的宽带k分布模型.用该模型计算了水蒸气重要谱带的有效带宽.并与逐线计算、Edwards指数宽谱带模型和以前的一些宽带k分布模型作了比较.结果表明积分格式对结果影响不大.对2.7μm和1.87μm谱带,本文提出的宽带k分布模型和逐线计算结果吻合;对6.3μm谱带.最大相对误差大约为10%,比指数宽谱带模型和以前的宽带k分布模型更准确.A new wide band k distribution model was developed, in which the Planck-function- weighted k-distribution was introduced. The equivalent line width for main bands of water vapor was computed using the wide band k distribution model, and compared with that obtained using line-by- line calculations, Edwards exponential wide band model and other wide band k-distribution model. The results show that the quadrature scheme has little influence on the equivalent line width. In 2.7 and 1.87 micrometer band, the equivalent line width calculated using the new wide band k-distribution model is almost identical with LBL result. For 6.3 micrometer band, the largest relative error of the new wide band k-distribution model is about 10%, which is much smaller than these of Edwards exponential wide band model and other wide band k-distribution model.

关 键 词：水蒸气 宽带K分布模型 指数宽谱带模型 有效带宽 

分 类 号：TK124[动力工程及工程热物理—工程热物理]