On the shear stress and thermal footprints of turbulent spots at zero pressure gradient
On the shear stress and thermal footprints of turbulent spots at zero pressure gradient
复制标题
零压力梯度下湍流点的剪切应力和热足迹
DOI：
10.1007/s12206-013-0121-z
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发表时间：
2013
影响因子：
1.6
通讯作者：
S. Zhong
中科院分区：
文献类型：
--
作者：
T. Chong;S. Zhong
湍流斑点是在平板边界层中人工形成的，并由剪应力敏感和温度敏感的液晶显示。这些程序使用表面切应力和温度作为被动示踪剂，以提供对近壁区域湍流斑点结构的洞察。液晶成功地显示了斑点的“真实”足迹。定量数据，如热传递速率，也同样被提供。本文的研究结果证明了湍流点上跨距悬挑的存在，这对燃气轮机工业的过渡建模具有重要的意义。
Turbulent spots were artificially created in a flat plate boundary layer and visualized by shear-stress sensitive and temperature-sensitive liquid crystals. These procedures employ surface shear stress and temperature as passive tracers to provide insights into the structure of a turbulent spot at the near-wall region. The liquid crystals successfully displayed the “true” footprints of the spots. Quantitative data, such as the heat transfer rate, were likewise provided. The results of the present study prove the existence of a spanwise overhang on a turbulent spot, which could produce important implications on transitional modeling in gas turbine industry.