Experimental Determination of the Sub-grid Scale Scalar Flux in a Non-Reacting Jet-Flow
Experimental Determination of the Sub-grid Scale Scalar Flux in a Non-Reacting Jet-Flow
复制标题
非反应射流中亚网格尺度标量通量的实验测定
DOI：
10.1007/s10494-007-9102-6
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
A. Sadiki
中科院分区：
文献类型：
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作者：
M. Löffler;S. Pfadler;F. Beyrau;A. Leipertz;F. Dinkelacker;Ying Huai;A. Sadiki
本文提出了一种直接确定大涡模拟（LES）中亚网格尺度标量通量的实验方法。研究了两种非反应射流结构，一种是射流温度接近环境温度，另一种是预热射流。因此得到了不同粘度的数据。每个病例调查了两个不同的，高雷诺数17,471和31,714。对于混合分数和流速场的测量，获得了接近100 μm的最佳分辨率。这样，在同一数据集上既可以得到亚网格尺度的标量通量，也可以得到空间滤波量。数据采用平面激光诱导荧光（LIF）和粒子图像测速（PIV）同步获取。
This work presents an experimental approach to the direct determination of the sub-grid scale scalar flux used in Large Eddy Simulation (LES). Two non-reacting jet-flow configurations were examined, one with the jet temperature similar to the ambient air temperature and one preheated jet. Hence data were obtained for varying viscosities. Each case was investigated for two different, high Reynolds numbers of 17,471 and 31,714. For the measurements of mixture fraction and flow velocity field a finest resolution of almost 100 μm was achieved. Thus both the sub-grid scale scalar flux as well as the spatially filtered quantities can be obtained from the same data set. The data were acquired by the simultaneous application of planar laser-induced fluorescence (LIF) and particle image velocimetry (PIV).