Experimental and numerical analysis of a lean premixed stratified burner using 1D Raman/Rayleigh scattering and large eddy simulation
Experimental and numerical analysis of a lean premixed stratified burner using 1D Raman/Rayleigh scattering and large eddy simulation
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DOI：
10.1016/j.combustflame.2012.02.010
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发表时间：
2012-08
影响因子：
4.4
通讯作者：
G. Kuenne;F. Seffrin;Frederik Fuest;Thabo Stahler;A. Ketelheun;D. Geyer;J. Janicka;A. Dreizler
中科院分区：
文献类型：
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作者：
G. Kuenne;F. Seffrin;Frederik Fuest;Thabo Stahler;A. Ketelheun;D. Geyer;J. Janicka;A. Dreizler
采用实验与数值相结合的方法研究了湍流贫油预混分层火焰（达姆施塔特分层燃烧器的火焰TSF-A）。首先，通过一维拉曼/瑞利散射实验获得温度和主要组分的分布。这些测量值用于提供对分层燃烧物理的深入了解，并作为数值模型的验证数据。作为第二步，大涡模拟（LES）进行了列表化学与增厚的火焰方法相结合。化学表使用进度变量和另外的混合物分数作为第二控制变量来说明当量比的变化。为了检验模型的适用性，人工增厚的分层火焰模拟的影响进行了研究，通过一个一维的测试用例。此外，在三维模拟中使用两种不同的网格来评估建模影响。从测量和模拟获得的数据，并比较沿着径向轮廓在几个轴向位置。关于反应区与混合层的相互作用的进一步信息已经从LES中提取，这是目前无法通过实验获得的。
A joint experimental and numerical approach is conducted to investigate a turbulent lean premixed stratified flame (flame TSF-A of the Darmstadt stratified burner). First, the distribution of the temperature and main species is obtained experimentally by 1D Raman/Rayleigh scattering. These measurements are used to provide insight into the physics of stratified combustion and to serve as validation data for numerical models. As a second step Large Eddy Simulations (LES) are carried out using tabulated chemistry combined with a thickened flame approach. The chemistry table uses the progress variable and additionally the mixture fraction as a second controlling variable to account for the variation in equivalence ratio. To test the applicability of the model, the influence of artificial thickening on the simulation of stratified flames is investigated by means of a one-dimensional test case. Furthermore, two different grids are used in the three-dimensional simulations to assess the modeling impact. The data obtained from the measurements and simulations are presented and compared along radial profiles at several axial positions. Further information about the interaction of the reaction zone with the mixing layer has been extracted from the LES which is currently not accessible by experiments.