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Description of kerosene / air combustion with Hybrid Transported-Tabulated Chemistry
Fuel ( IF 7.4 ) Pub Date : 2018-12-01 , DOI: 10.1016/j.fuel.2018.06.014
Bastien Duboc , Guillaume Ribert , Pascale Domingo

Abstract A strategy to introduce the detailed chemistry of kerosene-air combustion into simulations of flames is reported. Despite the rise in computer power achieved during the last decade, simulations of combustion chambers using detailed chemistry mechanisms are still not possible because of the large number of species to be transported. The Hybrid Transported-Tabulated Chemistry method (HTTC) has been designed to overcome these obstacles and radically reduce the computational cost, by transporting only a reduced set of major species and tabulating the intermediate species while making use of their self-similarity property to downsize the table. HTTC has already been validated for light hydrocarbons such as methane. In this work, HTTC is extended to kerosene-air combustion showing that the number of species to be transported is unchanged compared to methane/air and that the self-similarity can still be applied. The chemistry of nitrogen oxides is also addressed with HTTC. The method allows for a reduction of the computational cost by around four orders of magnitude when computing laminar premixed flames. HTTC appears as a flexible tool since its prediction capabilities are maintained even if the table for intermediate species is generated in different conditions than those encountered in the simulation.

中文翻译:

煤油/空气燃烧与混合传输列表化学的描述

摘要 报告了将煤油-空气燃烧的详细化学引入火焰模拟的策略。尽管在过去十年中实现了计算机能力的提高,但由于要传输的物种数量众多,使用详细的化学机制模拟燃烧室仍然是不可能的。Hybrid Transported-Tabulated Chemistry 方法 (HTTC) 旨在克服这些障碍并从根本上降低计算成本,方法是仅传输一组减少的主要物种并列出中间物种,同时利用它们的自相似性来缩小计算量桌子。HTTC 已被验证用于轻质碳氢化合物,如甲烷。在这项工作中,HTTC 扩展到煤油-空气燃烧,表明与甲烷/空气相比,要传输的物种数量没有变化,并且仍然可以应用自相似性。氮氧化物的化学性质也通过 HTTC 解决。当计算层流预混火焰时,该方法允许将计算成本降低大约四个数量级。HTTC 看起来是一种灵活的工具,因为即使在与模拟中遇到的条件不同的条件下生成中间物种表,它的预测能力也能保持不变。
更新日期:2018-12-01
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