Large-eddy simulation of turbulent flow inside a sudden-expansion cylindrical chamber
Large-eddy simulation of turbulent flow inside a sudden-expansion cylindrical chamber
复制标题
突然膨胀圆柱室内湍流的大涡模拟
DOI：
10.22634/ksme-b.2001.25.7.885
复制
发表时间：
2001
影响因子：
0.2
通讯作者：
Sang
中科院分区：
文献类型：
--
作者：
H. Seong;Sang
对燃烧装置内的湍流进行了大涡模拟（LES）。燃烧装置简化为一个突然膨胀的气缸。为了促进湍流混合并适应火焰稳定性，火焰保持器附接在燃烧室内。重点放在不同几何形状的火焰保持器的流动细节上。Smagorinsky模型和拉格朗日动态亚网格模型的应用和测试。仿真代码使用基于物理逆变速度分量的通用坐标系构造。根据体积速度和入口管直径计算的雷诺数分别为5000和50000。通过与激光多普勒测速仪获得的实验数据进行比较，对预测的湍流统计进行了评估。LES与实验数据的协议是令人满意的。
A large-eddy simulation (LES) is performed for turbulent flow inside a combustion device. The combustion device is simplified as a cylinder with sudden expansion. To promote turbulent mixing and to accommodate flame stability, a flame holder is attached inside the combustion chamber. Emphasis is placed on the flow details with dierent geometries of the flame holder. The Smagorinsky model and the Lagrangian dynamic subgrid-scale model are applied and tested. The simulation code is constructed using a general coordinate system based on the physical contravariant velocity components. The calculated Reynolds numbers are 5000 and 50000 based on the bulk velocity and the diameter of the inlet pipe. The predicted turbulent statistics are evaluated by comparing with the experimental data, which are obtained by laser Doppler velocimetry. The agreement of the LES with the experimental data is shown to be satisfactory.
DOI：
10.1063/1.857955
发表时间：
1991-07-01
期刊：
PHYSICS OF FLUIDS A-FLUID DYNAMICS
影响因子：
--
作者：
GERMANO, M;PIOMELLI, U;CABOT, WH
通讯作者：
CABOT, WH