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Numerical investigation behavior of reacting flow for flameless oxidation technology of MILD combustion: Effect of fluctuating temperature of inlet co-flow

机译：MILD燃烧无焰氧化技术反应流的数值研究行为：入口同流波动温度的影响

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摘要

To grow the knowledge to the moderate or intense low-oxygen dilution combustion, namely MILD combustion, the present paper examines the CH4-H-2 MILD combustion under various working conditions in a jet in hot coflow burner which called Daily burner using a finite volume code. This burner can produce MILD combustion regime in the upstream and conventional combustion regime in the downstream. For this end, detailed reaction mechanism (GRI-Mech 2.11), the k-epsilon MG by the kinetic energy of turbulence of 53 m(2)/s(2) for fuel inlet and 3 m(2)/s(2) for hot coflow inlet as well as the eddy dissipation concept model for treating the interaction between the turbulence and the chemistry in flames are used. At first, the results are compared with the experimental data and after validating the results of the solution obtained, the MILD combustion is investigated by using sinusoidal pattern temperature between 1580 K and 1180 K, respectively. The results show that by using fluctuation temperature of inlet co-flow, the MILD combustion regime develop in a wider area. reaction zone and the release energy have increased during the initial oscillation at the incoming temperature, and along with this amount of Water vapor and CO2 have increased, while the amount of CO has also been slightly reduced. (C) 2019 Elsevier Ltd. All rights reserved.
机译：为了将知识发展为中等或强烈的低氧稀释燃烧，即MILD燃烧，本文研究了在有限流量下在热同流燃烧器（称为Daily燃烧器）中的射流中各种工作条件下的CH4-H-2 MILD燃烧。码。该燃烧器可在上游产生MILD燃烧状态，在下游产生常规燃烧状态。为此，详细的反应机理（GRI-Mech 2.11），k-εMG通过动量为53 m（2）/ s（2）的燃料入口和3 m（2）/ s（2）的湍动能。用于热同流入口以及用于处理湍流和火焰中化学物质之间相互作用的涡流消散概念模型。首先，将结果与实验数据进行比较，并在验证所得解决方案的结果之后，分别使用1580 K和1180 K之间的正弦模式温度研究MILD燃烧。结果表明，通过使用进口同流的波动温度，MILD燃烧状态在更宽的范围内发展。在进入温度下的初始振荡过程中，反应区和释放能量增加，与此同时水蒸气和CO2的量也增加，而CO的量也略有减少。 （C）2019 Elsevier Ltd.保留所有权利。

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