微尺度燃烧过程中传热准则数分析  

Analysis of Criterion Number of Heat Transfer in Micro Combustion Process

作　　者：潘剑锋[1] 周俊[1] 唐爱坤[1] 邵霞[1] 薛宏 

机构地区：[1]江苏大学能源与动力工程学院,镇江212013 [2]美国加州州立工业大学机械工程系

出　　处：《农业机械学报》2011年第12期197-201,219,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50706016);江苏省基础研究计划资助项目(BK2008245);江苏省高校优势学科建设工程资助项目;江苏大学"拔尖人才培养工程"资助项目

摘　　要：在微尺度条件下,由于对流传热和燃烧过程耦合发生在很小的范围内,因此微燃烧室内部的对流换热问题比较复杂。根据微燃烧室内部流动、传热和燃烧过程模拟计算的结果,采用无量纲分析方法,计算出表征距入口x处各通道截面平均对流换热强度的努塞尔数Nux,并分析入口参数对Nux的影响。对多组计算结果进行多元回归拟合,最终得到各截面平均Nux与雷诺数Rex、普朗特数Prx和无量纲变量θ之间的函数表达式。In the micro-scale conditions,due to the heat transfer coupling with the combustion process within the micro-combustor,the convection and heat transfer in the micro-combustor were rather complicated issues.Based on the simulation results of the flow,heat transfer and combustion process in the micro-combustor.Dimensionless analysis method was used to calculate the dimensionless Nux number which described the convection and heat transfer intensity in the channel cross-section away from the entrance at x.Then effects of inlet parameters on the dimensionless Nux number were analyzed.The formula between the dimensionless variables θ and average Nux,Rex,Prx numbers in the channel cross-section was obtained by multiple regression analysis.

关 键 词：微尺度燃烧 传热准则数 无量纲参数 多元回归拟合 

分 类 号：TK5[动力工程及工程热物理—热能工程]