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Method for evaluation of effective forced-convective heat transfer rate associated with chemical heat absorption of heated fluid mixture: Part Ⅰ

机译:与加热流体混合物化学吸热有关的有效强制对流传热速率的评估方法:第一部分

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摘要

This article proposes a phenomenological method for evaluating the effective laminar forced-convective heat transfer rate between a hot wall and a heated fluid in which a positive heat of reaction is absorbed due to an endothermic reaction related to decompositions of the fluid molecules into numerous species. To avoid not only complicacies of such phenomena due to multiple variables and properties but also non-linearities of property variations due to reaction advancement, the problem is divided into two idealized processes of state change based on a classical thermodynamic viewpoint in which the non-atomic continuum approach is validated. The proposed method derives a simple but meaningful relation for the augmentation ratio of the effective Nusselt number as a result.
机译:本文提出了一种现象学方法,用于评估热壁与加热流体之间的有效层流强迫对流传热速率,在该流体中,由于与流体分子分解为多种物质的吸热反应而吸收了正反应热。为了不仅避免由于多种变量和性质而造成的此类现象的复杂性,而且还避免由于反应进行而导致的性质变化的非线性,基于经典的热力学观点,将问题分为两个理想的状态变化过程,在该过程中,非原子性连续方法得到验证。因此,所提出的方法对于有效努塞尔特数的增加率得出了一个简单但有意义的关系。

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