Large eddy simulation of dilute acetone spray flames using CMC coupled with tabulated chemistry
Large eddy simulation of dilute acetone spray flames using CMC coupled with tabulated chemistry
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DOI：
10.1016/j.proci.2014.06.013
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发表时间：
2015-01-01
影响因子：
3.4
通讯作者：
Stein, O. T.
中科院分区：
文献类型：
--
作者：
Ukai, S.;Kronenburg, A.;Stein, O. T.
将条件矩闭合(CMC)方法与大涡模拟(LES)相耦合，用于湍流喷雾火焰的模拟。本研究是对CMC(CMCe)的扩展，它补救了早期LES-CMC研究(Ukai等人，2013)[1]中的一些不一致之处。在这里，CMC方法与化学表相结合，该表允许列表化学成分的空间和时间变化，并确保合理准确地计算LES过滤的反应进度变量的化学源项，尽管由CMC方程计算的条件平均值周围有很大的波动。通过与两个预蒸发稀丙酮喷雾火焰实验结果的比较，验证了CMCe的有效性。温度预报和轴向喷雾速度显著提高，特别是沿中心线方向，而速度均方根显示出合理的一致性。(C)2014年，燃烧研究所。爱思唯尔公司出版，版权所有。
A conditional moment closure (CMC) method has been coupled to a large eddy simulation (LES) for the modelling of turbulent spray flames. The present study presents an extension to CMC (CMCe) that remediates some inconsistencies of an earlier LES-CMC study (Ukai et al., 2013) [1]. Here, the CMC approach is coupled with a chemistry table that allows for spatial and temporal variations of the tabulated chemical composition and ensures a reasonably accurate computation of the chemical source term of the LES-filtered reaction progress variable despite large fluctuations around the conditional means computed by the CMC equation. CMCe is validated by comparison with experimental results of two dilute acetone spray flames with pre-evaporation. Temperature predictions and axial spray velocities are markedly improved, especially along the centreline, while the velocity RMS shows reasonable agreement. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.