强迫对流条件下固体层流燃烧理论研究  

Theoretical Study of Solid Laminar Combustion Under Forced Flow

作　　者：勾福海 肖华华[1] 李宓 孙金华[1] GOU Fuhai;XIAO Huahua;LI Mi;SUN Jinhua(State Key Laboratory of Fire Science,The University of Science and Technology of China,Hefei 230026)

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230026

出　　处：《工程热物理学报》2022年第11期3076-3082,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51976210,52020105008);安徽高校协同创新项目(No.GXXT-2020-079);中央高校基本科研业务费专项资金(No.WK2320000048)。

摘　　要：本文研究了强迫对流条件下固体平板层流燃烧特性,开展了不同尺寸的PMMA板在强迫对流条件下的稳定燃烧实验。强迫对流条件下的固体平板燃烧理论是基于边界层理论发展而来,在实验中也可以看出,PMMA平板燃烧状态是稳定的层流燃烧。根据边界层理论,本文求解了流函数方程,得到了火焰厚度以及努塞尔数的理论表达式。根据实验结果,探讨了火焰厚度、火焰长度、努塞尔数和雷诺数的关系及质量损失速率的变化。In this paper, the laminar combustion characteristics of solid plates under forced flow have been studied. The steady combustion experiments of PMMA plates of different sizes under forced flow have been carried out. The theory of solid plate combustion under forced flow is developed based on the boundary layer theory. It can also be seen from the experiments that the combustion state of PMMA plate is stable laminar combustion. Based on the boundary layer theory, the flow function equation is solved and the theoretical expressions of flame thickness and Nusselt number are obtained. Based on the experimental results, flame thickness, flame length, the relationship between Nusselt number and Reynolds number, and the mass loss rate are discussed.

关 键 词：层流燃烧 边界层 火焰 质量损失速率 

分 类 号：V438[航空宇航科学与技术—航空宇航推进理论与工程]