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Modeling the kinetics of the Shockless Explosion Combustion

机译:模拟无冲击爆炸燃烧的动力学

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The Shockless Explosion Combustion (SEC) is a novel approach to approximating constant volume combustion in gas turbines. It promises an efficiency gain comparable to that of pulse detonation combustion without the drawbacks associated with detonations. It utilizes quasi -homogeneous combustion of a volume of fuel & air mixture to avoid strong shock waves, similar to the Homogeneous Charge Compression Ignition (HCCI) process in internal combustion engines. Recharging is handled in analogy to a pulse jet combustor through resonant pressure waves in the combustion chamber. To achieve nearly homogeneous auto -ignition, a stratified layer of fuel/air is set up such that almost constant time to ignition remains across the charge once the recharging process is completed. Here we introduce simplified chemical kinetics models that enable efficient computational modeling of the entire process. Based on numerical simulations we assess essential influences of chemical kinetics on the subtle gasdynamics involved in the SEC process and discuss results on its feasibility. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译:无冲击爆炸燃烧(SEC)是一种新方法,可近似估算燃气轮机中的恒定体积燃烧。它保证了与脉冲爆震燃烧相当的效率增益,而没有与爆震相关的缺点。它利用一定量的燃料和空气混合物的准均质燃烧来避免强烈的冲击波,这类似于内燃机的均质充气压缩点火(HCCI)过程。通过燃烧室中的共振压力波,类似于脉冲燃烧器进行补给。为了实现近乎均匀的自动点火,设置了一层分层的燃料/空气,以便一旦完成充电过程,在整个装料中几乎保持恒定的点火时间。在这里,我们介绍简化的化学动力学模型,以实现整个过程的高效计算建模。基于数值模拟,我们评估了化学动力学对SEC过程涉及的微妙气体动力学的基本影响,并讨论了其可行性的结果。 (C)2016年燃烧研究所。由Elsevier Inc.出版。保留所有权利。

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