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Numerical study of methanol flames in laminar forced convective environment using short chemical kinetics mechanism
Combustion Theory and Modelling ( IF 1.3 ) Pub Date : 2019-10-23 , DOI: 10.1080/13647830.2019.1677943
Sharanya Nair 1 , Vasudevan Raghavan 1
Affiliation  

Due to recent interest in methanol economy, it is seen that a numerical study of combustion of methanol in a comprehensive manner is necessary. Motivated from this interest and based on the studies from literature, a numerical study on prediction of structures of non-premixed methanol-air flames in laminar forced convective environment is reported. Two-dimensional, planar and axisymmetric, computational domains are considered. Corresponding governing equations for conservation of mass, momentum, species and energy have been solved using Ansys FLUENT. The numerical model incorporates multi-component diffusion, variable thermal and physical properties, a short chemical kinetics mechanism with 18 species and 38 elementary reactions, and a non-luminous thermal radiation model. Homogeneous flames in opposed flow and heterogeneous flames in cross-flow and co-flow configurations are studied. For heterogeneous flames, interface conditions at the liquid methanol surface are defined systematically using a user-defined function. Numerical results are validated against the experimental results available in literature. Results in terms of mass burning rates, flow, species and temperature fields have been presented to describe the flame characteristics.

中文翻译:

层流强制对流环境中甲醇火焰的短化学动力学数值研究

由于最近对甲醇经济的兴趣,可以看出以综合方式对甲醇燃烧进行数值研究是必要的。出于这种兴趣并基于文献研究,报道了层流强制对流环境中非预混甲醇-空气火焰结构预测的数值研究。考虑了二维、平面和轴对称计算域。质量、动量、物种和能量守恒的相应控制方程已使用 Ansys FLUENT 求解。该数值模型结合了多组分扩散、可变的热和物理特性、具有 18 种物质和 38 个基本反应的短化学动力学机制以及不发光的热辐射模型。研究了对流中的均质火焰和横流和并流配置中的异质火焰。对于异质火焰,液体甲醇表面的界面条件使用用户定义的函数系统地定义。数值结果根据文献中可用的实验结果进行了验证。已经提供了质量燃烧率、流量、种类和温度场方面的结果来描述火焰特性。
更新日期:2019-10-23
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