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首页> 外文期刊>International Journal of Heat and Mass Transfer >Transient condensation of flowing vapor on a flat-plate: A scaling analysis
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Transient condensation of flowing vapor on a flat-plate: A scaling analysis

机译：平板上流动蒸汽的瞬态冷凝：结垢分析

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摘要

We perform an analysis of condensation of pure vapor flowing over a cooled flat plate. We estimate the time taken to achieve steady-state condensation by a transient analysis where we use results from previous studies that show that the time-dependent behavior is governed by the propagation of a kinematic wave along the condensate film. The steady-state time at any streamwise location along the plate depends on the steady-state film thickness at that location. Classical theories of laminar steady-state condensation are reviewed, and a scaling analysis is performed to capture the scalings for relevant quantities such as the liquid film thickness, liquid velocity, and heat transfer coefficient The results from the scaling analysis are entirely consistent with the classical theories. Finally, the scaling analysis is extended to take into account effects of turbulence in the liquid film.
机译：我们对流过冷却平板的纯蒸汽的冷凝进行分析。我们通过瞬态分析估算了达到稳态冷凝所需的时间，在瞬态分析中，我们使用了以前研究的结果，这些结果表明与时间有关的行为是由运动波沿冷凝膜的传播控制的。沿板的任何流向位置的稳态时间取决于该位置的稳态薄膜厚度。回顾了层流稳态冷凝的经典理论，并进行了结垢分析以捕获相关量的结垢，例如液膜厚度，液体速度和传热系数。结垢分析的结果与经典一致理论。最后，扩展了定标分析以考虑液膜中湍流的影响。

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