Large-Eddy Simulation of oxygen/methane flames under transcritical conditions
Large-Eddy Simulation of oxygen/methane flames under transcritical conditions
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DOI：
10.1016/j.proci.2010.07.036
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
T. Schmitt;Yoann Méry;M. Boileau;S. Candel
中科院分区：
文献类型：
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作者：
T. Schmitt;Yoann Méry;M. Boileau;S. Candel
本文考虑了跨临界燃烧的大涡模拟。这种分析是由火箭推进应用的动机，其中低温氧在低温下注入，低于临界值，在高压环境中的压力是临界以上。在这个范围内遇到的问题涉及到真实气体效应的描述，特别是涉及到跨临界流体从低温到高温演变时发生的非常大的密度变化的表示。模拟还需要合适的空间过滤燃烧模型，其可用于确定反应基本上以非预混模式发生的情况下的体积反应速率。提出了一个模型，并在“H3”大气火焰配置进行了验证。然后，该模型用于AVBP LES流求解器的跨临界版本。进行跨临界氧/超临界甲烷喷射的计算结果与最近的实验数据吻合良好，并提供了更多的信息，火焰结构和流动配置。
Large-Eddy Simulation of transcritical combustion is considered in this article. This analysis is motivated by rocket propulsion applications where cryogenic oxygen is injected at low temperature, below the critical value, in a high pressure environment where the pressure is above critical. Problems encountered in this range are related to the description of real-gas effects and in particular to the representation of the very large density changes which occur when a transcritical fluid evolves from low to high temperatures. The simulation also requires a suitable spatially filtered combustion model which can be used to determine the volumetric reaction rates in a situation where reaction essentially takes place in a non-premixed mode. A model is proposed and validated in the “H3” atmospheric flame configuration. This model is then used in a transcritical version of the AVBP LES flow solver. Results of calculations carried out for transcritical oxygen/supercritical methane injection are in good agreement with recent experimental data and provide additional information on the flame structure and flow configuration.