Numerical Analysis of Steady Smoldering of Biomass Rods  

生物质棒稳态阴燃数值分析

作　　者：Zhao Wentao Yu Guangxin Zhang Yi Wang Youtang Zhou Dan He Fang 赵文涛;于光鑫;张毅;王有镗;周丹;何芳(山东理工大学交通与车辆工程学院,淄博255049)

机构地区：[1]School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255049,China

出　　处：《燃烧科学与技术》2024年第5期507-519,共13页Journal of Combustion Science and Technology

基　　金：中德合作交流互访资助项目(M-0183);山东省自然科学基金资助项目(ZR2022ME038);科技型中小企业创新能力提升工程资助项目(2021TSGC1114).

摘　　要：Understanding the steady mechanism of biomass smoldering plays a great role in the utilization of smoldering technology.In this study numerical analysis of steady smoldering of biomass rods was performed.A two-dimensional(2D)steady model taking into account both char oxidation and pyrolysis was developed on the basis of a calculated propagation velocity according to empirical correlation.The model was validated against the smoldering experiment of biomass rods under natural conditions,and the maximum error was smaller than 31%.Parameter sensitivity analysis found that propagation velocity decreases significantly while oxidation area and pyrolysis zone increase significantly with the increasing diameter of rod fuel.明确生物质稳态阴燃机理是其技术应用的关键.本文对自制生物质棒的稳态阴燃过程进行了数值分析.在根据经验关联式计算的传播速度基础上,建立了一个同时考虑炭氧化及热解的二维稳态阴燃模型.利用生物质棒阴燃实验对该模型进行了验证,传播速度及炭锥高度实验值与预测值的最大误差均小于31%.参数敏感性分析发现,随着棒状燃料直径的增加,传播速度显著降低,氧化及热解区显著增加.

关 键 词：steady smoldering biomass rod numerical analysis 2D steady model sensitivity analysis 

分 类 号：TK6[动力工程及工程热物理—生物能]