改进的Bilger型湍流燃烧反应速率模型及其数值模拟的验证  

Development and application of a Biiger-type turbulent combustion reaction rate model with simulating fire scenarios

作　　者：张建文[1] Fuchen Jia E.D. Galea 

机构地区：[1]北京化工大学经济管理学院,北京100029 [2]Fire Safety Engineering Group, Centre for the Numerical Modelling and Process Analysis, University of Greenwich, London SE 10 9LS, UK

出　　处：《计算机与应用化学》2007年第11期1441-1446,共6页Computers and Applied Chemistry

基　　金：Liverhulme Trust博士后基金;教育部留学回国人员科研启动基金

摘　　要：基于旋涡耗散原理,结合平均生成速率正比于化学计量比下的混合分数的概率密度的理论分析,发展Bilger型燃烧反应速率模型,使之能够模拟富氧和贫氧燃烧工况。模型中利用快速反应假设,辐射由多射线模型模拟,结果与Steckler的燃烧实验数据比较,并与文献中多个模型比较。温度、速度分布以及总体量的比较表明,当前模型比传统的EDM、Brizulea-Bilger模型在模拟贫氧燃烧方面好。对不同模型的应用提出了建议。The Bilger-type turbulent combustion rate model was further developed based on the analysis of eddy dissipation principle and the theoretical evidence that the mean production rate is proportional to the pdf of the mixture fraction at stoichiometry. Fast chemical reaction was assumed and the radiation was modelled by multi ray radiation model. To validate the model, comparisons and analysis were made for fire scenarios of Steckler etc. c163 and with the numerical simulations from other combustion models for a fire experiment. The comparisons of general performances of different combustion models showed that present model achieved better performance for stronger fires, EDM gave better results for small fires, Brizulea and Bilger model generally gave similar results to present model for small power fires but greatly over-predicted the temperatures for the large output fires. Further development and thorough validation would help to ensure the most appropriate application of the various combustion models in fire modelling.

关 键 词：燃烧 辐射 燃烧速率模型 数值模拟 

分 类 号：TK411.2[动力工程及工程热物理—动力机械及工程] TQ03[化学工程]