Effects of radiative heat transfer on the structure of turbulent supersonic channel flow
Effects of radiative heat transfer on the structure of turbulent supersonic channel flow
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辐射传热对超声速湍流通道流结构的影响
DOI：
10.1017/jfm.2011.92
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发表时间：
2011
影响因子：
3.7
通讯作者：
M. Hafi
中科院分区：
文献类型：
--
作者：
Somnath Ghosh;R. Friedrich;M. Pfitzner;C. Stemmer;B. Cuenot;M. Hafi
采用大涡模拟方法研究了超声速微小通道内湍流与辐射换热的相互作用。工作流体是具有随温度变化的比热和分子输运系数的纯水蒸气。它的线光谱特性表示与统计窄带相关-k模型。还测试了灰气体模型。平行的无滑移通道壁被处理为涉及热辐射的黑色表面，并保持在1000 K的恒定温度下。对不同的光学厚度（基于普朗克平均吸收系数）和不同的马赫数进行了模拟。平均流变量、雷诺应力及其输运方程的某些项的结果表明，热辐射效应抵消了压缩性（马赫数）效应。总能量平衡的分析揭示了辐射传热的重要性，相比湍流和平均分子热传输。
The interaction between turbulence in a minimal supersonic channel and radiative heat transfer is studied using large-eddy simulation. The working fluid is pure water vapour with temperature-dependent specific heats and molecular transport coefficients. Its line spectra properties are represented with a statistical narrow-band correlated-k model. A grey gas model is also tested. The parallel no-slip channel walls are treated as black surfaces concerning thermal radiation and are kept at a constant temperature of 1000 K. Simulations have been performed for different optical thicknesses (based on the Planck mean absorption coefficient) and different Mach numbers. Results for the mean flow variables, Reynolds stresses and certain terms of their transport equations indicate that thermal radiation effects counteract compressibility (Mach number) effects. An analysis of the total energy balance reveals the importance of radiative heat transfer, compared to the turbulent and mean molecular heat transport.