摘要
用大涡模拟的方法对带凹腔支板进行了数值模拟。采用Smagorinsky-Lily亚网格尺度模型,并用SIMPLE算法和中心差分格式求解离散方程。仿真结果表明:凹腔对支板尾流有一定的影响;在本文研究的凹腔深度范围内(5mm、11mm、15mm),随着凹腔深度的增加,尾流近壁面旋涡的最大涡量值先减小后增大,频率先增大后减小。
Large Eddy Simulation（LES） was used to numerically investigate the strut with cavity.Smagorinsky-Lily subgrid-scale model,SIMPLE algorithm and central differencing scheme were employed to solve diffusion equations.The calculation results indicated that the wake flow field was distinct for strut with cavity.Within the depth of the cavity in this study（5mm,11mm,15mm）,the maximum vorticity of wake vortex near the wall decreased first and then increased as depth increment,but the frequency was on the contrary trend.
出处
《燃气涡轮试验与研究》
2010年第4期35-38,共4页
Gas Turbine Experiment and Research
关键词
支板
凹腔
尾流流动
旋涡结构
大涡模拟
火焰稳定
strut
cavity
wake flow
vortex structure
large-eddy simulation
flame hold
