Numerical Modelling of Swirl Stabilised Lean-Premixed H2-CH4 Flames with the Artificially Thickened Flame Model

IF 1.4 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Simone Castellani, Pier Carlo Nassini, Antonio Andreini, Roberto Meloni, Egidio Pucci, Agustin Valera Medina, Steven Morris, Burak Goktepe, Syed Mashruk
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Abstract

Abstract The lean premixed technology is a very convenient combustion strategy to progressively move from natural gas to high hydrogen content fuels in gas turbines limiting the pollutants emissions at the same time. The enabling process that will allow the combustor to manage a full H2 operation requires relevant design modifications, and in this framework, the numerical modelling will be a pivotal tool that will support this transition. In this work, high-fidelity simulations of perfectly premixed swirl stabilized flames have been performed varying the H2 content in the fuel from 0 to 100% to investigate the effect of the hydrogen addition on the methane flame. The artificially thickened flame model (ATFM) has been used to treat the turbulent chemistry interaction. The numerical results have been compared with the detailed experimental data performed at Cardiff University's Gas Turbine Research Centre. After the numerical model validation against experimental OH* chemiluminescence maps has been presented, a deep numerical investigation of the effect of the H2 addition on the flame has been performed. In this way, the work aims to highlight the good prediction capability of the ATFM, and, at the same time, highlight the change in the different contributions that govern the flame reactivity moving from 100% CH4 to 100% H2 in very lean conditions.
旋流稳定稀薄预混H2-CH4火焰的人工增厚模型数值模拟
摘要精益预混技术是一种非常方便的燃烧策略,可以在限制污染物排放的同时,逐步实现燃气轮机从天然气向高氢燃料的过渡。使燃烧器能够管理完整的H2操作的启用过程需要相关的设计修改,在此框架下,数值建模将成为支持这一转变的关键工具。在这项工作中,高保真地模拟了完全预混涡流稳定火焰,改变燃料中H2含量从0到100%,以研究氢气添加对甲烷火焰的影响。采用人工增厚火焰模型(ATFM)来处理湍流化学相互作用。数值结果与卡迪夫大学燃气轮机研究中心的详细实验数据进行了比较。在对实验OH*化学发光图的数值模型进行验证后,对H2的加入对火焰的影响进行了深入的数值研究。通过这种方式,该工作旨在突出ATFM的良好预测能力,同时突出在非常稀薄的条件下,控制火焰反应性从100% CH4到100% H2的不同贡献的变化。
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来源期刊
CiteScore
3.80
自引率
20.00%
发文量
292
审稿时长
2.0 months
期刊介绍: The ASME Journal of Engineering for Gas Turbines and Power publishes archival-quality papers in the areas of gas and steam turbine technology, nuclear engineering, internal combustion engines, and fossil power generation. It covers a broad spectrum of practical topics of interest to industry. Subject areas covered include: thermodynamics; fluid mechanics; heat transfer; and modeling; propulsion and power generation components and systems; combustion, fuels, and emissions; nuclear reactor systems and components; thermal hydraulics; heat exchangers; nuclear fuel technology and waste management; I. C. engines for marine, rail, and power generation; steam and hydro power generation; advanced cycles for fossil energy generation; pollution control and environmental effects.
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