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首页> 外文期刊>Experiments in Fluids: Experimental Methods and Their Applications to Fluid Flow >Visualisation of turbulent spots under the influence of adverse pressure gradients
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Visualisation of turbulent spots under the influence of adverse pressure gradients

机译:逆压力梯度影响下的湍流点可视化

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摘要

In this paper, a method of using temperature sensitive liquid crystal to visualize the thermal footprints of turbulent spots is described. It is employed to study the nature and development of artificially created turbulent spots in a laminar boundary layer over a heated surface under the influence of adverse pressure gradients in a water flow experiment. This method not only provides qualitative information about the structures and growth of the spot but also contours of heat flux beneath an entire spot as it propagates downstream. Furthermore, the lateral spreading angle and propagation rate of turbulent spots are obtained by analysing the colour images and heat transfer contours. The results are compared with those obtained by other researchers using different experimental methods. [References: 25]
机译:在本文中,描述了一种使用温度敏感液晶可视化湍流点的热足迹的方法。在水流实验中,它被用来研究在受热表面上的层流边界层中在不利压力梯度的影响下人工产生的湍流斑的性质和发展。该方法不仅提供有关光斑结构和生长的定性信息,而且还提供了整个光斑向下游传播时的热通量轮廓。此外,通过分析彩色图像和传热轮廓获得了横向扩散角和湍流斑的传播速率。将结果与其他研究人员使用不同实验方法获得的结果进行比较。 [参考:25]

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