Experiments for Combustion-LES Validation
Experiments for Combustion-LES Validation
复制标题
燃烧 LES 验证实验
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
A. Dreizler
中科院分区：
文献类型：
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作者：
B. Böhm;J. Brübach;C. Ertem;A. Dreizler
未来燃烧器的设计越来越依赖数值燃烧模拟。大涡模拟 (LES) 是一种比雷诺平均纳维-斯托克斯 (RANS) 方法更好地描述湍流的方法。然而，需要对子网格规模的过程进行建模。因此，使用全面可靠的实验数据集进行验证是燃烧 LES 开发的关键部分。使用明确的基准火焰和先进的激光诊断，可以以高时间和合理的空间分辨率精确测量不同的物理和化学量。在这篇文章中，简要回顾了对燃烧 LES 验证重要的数量和最常用的激光诊断方法。强调了高重复率和墙壁诊断领域的新挑战。在最后一章中，讨论了实验测量值与燃烧 LES 预测对应值的比较的一些关键方面。
Designs of future combustors increasingly rely on numerical combustion simulations. Large-eddy simulation (LES) emerged as a method to better describe turbulence than Reynolds-averaged Navier–Stokes (RANS) approaches. Processes at the subgrid scale, however, need to be modelled. Validation using comprehensive and reliable experimental data sets is therefore a crucial part in the development of combustion-LES. Using well-defined benchmark flames and advanced laser diagnostics, different physical and chemical quantities can be precisely measured with high temporal and reasonable spatial resolution. In this contribution, quantities important to combustion-LES validation and the most frequently used laser diagnostic methods are briefly reviewed. New challenges in the field of diagnostics at high repetition rates and at walls are highlighted. In a closing chapter, some critical aspects on the comparison of experimental measurands and combustion-LES-predicted counterparts are discussed.