Numerical Investigation of Near-Wall Turbulent Heat Transfer Taking Into Account the Unsteady Heat Conduction in the Solid Wall
Numerical Investigation of Near-Wall Turbulent Heat Transfer Taking Into Account the Unsteady Heat Conduction in the Solid Wall
复制标题
考虑固体壁非稳态热传导的近壁湍流传热数值研究
DOI：
10.1115/1.3250689
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发表时间：
1989
影响因子：
--
通讯作者：
M. Hirata
中科院分区：
文献类型：
--
作者：
N. Kasagi;A. Kuroda;M. Hirata
Kasagi 等人开发的确定性近壁湍流模型。 (1984b) 用于湍流传热的数值分析，其中考虑了与湍流不稳定性相关的壁内非稳态热传导。与基于雷诺分解的典型方法不同，模型给出的三个脉动速度的代数表达式直接引入到控制能量方程中。根据非定常共轭传热的数值结果，获得了不同普朗特数流体的温度方差、湍流热通量和湍流普朗特数等统计量。事实证明，这些量的近壁行为受到壁的热性能和厚度的强烈影响。此外，还计算了与相干湍流结构相关的温度方差的预算，并且除了耗散之外，每个预算项都与实验定性一致。
The deterministic near-wall turbulence model developed by Kasagi et al. (1984b) is used in a numerical analysis of turbulent heat transfer, in which the unsteady heat conduction inside the wall associated with the turbulent flow unsteadiness is taken into account. Unlike the typical methodology based on Reynolds decomposition, the algebraic expressions for the three fluctuating velocities given by the model are directly introduced into the governing energy equation. From the numerical results of the unsteady conjugate heat transfer, the statistical quantities, such as temperature variance, turbulent heat flux, and turbulent Prandtl number, are obtained for fluids of various Prandtl numbers. It is demonstrated that the near-wall behavior of these quantities is strongly influenced by the thermal properties and thickness of the wall. In addition, the budget of the temperature variance associated with coherent turbulence structure is calculated and, except for dissipation, each budget term is in qualitative agreement with the experiment.