Numerical study of periodically turbulent flow and heat transfer in a channel with transverse fin arrays
Numerical study of periodically turbulent flow and heat transfer in a channel with transverse fin arrays
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DOI：
10.1108/09615530010359139
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发表时间：
2000-12
影响因子：
4.2
通讯作者：
Z. X. Yuan
中科院分区：
文献类型：
--
作者：
Z. X. Yuan
对横向对置肋通道内周期性充分发展的湍流流动与换热特性进行了数值研究。雷诺数范围为2 × 104至7 × 104。计算采用K-e模型和壁面函数法。验证了翅片热边界条件对换热的影响。对于所研究的构型，不同于类似层流换热的显著特征是努塞尔数分布的第二峰现象。在相同泵功率的约束下，对强化传热的评价表明，相对肋高e/H = 0.1的结构效果上级e/H = 0.15和0.2的结构。与有杆扰动通道的结果比较，所研究的结构具有几乎相同的强化传热效果。对大鳍情况进行了瞬态仿真，验证了稳态算法的有效性。
A numerical study has been conducted for the characteristics of the periodically fully developed turbulent flow and heat transfer in a channel with transverse opposite‐positioned fins. The Reynolds number range is 2 × 104 to 7 × 104. K‐e model and wall function method were adopted during the calculation. The influence of the thermal boundary condition of the fin to the heat transfer has been verified. For the studied configuration the prominent feature that differs from the similar laminar heat transfer is the phenomenon of secondary peak of the Nusselt number distribution. Assessment of heat transfer enhancement under the constraint of the same pump power reveals that the effect of the configuration of the relative fin height, e/H, equal to 0.1 is superior to those of e/H equal to 0.15 and 0.2. Comparing with the results of the channel with rod disturbances, the studied configuration possesses nearly the same heat transfer enhancement effect. Transient simulations to cases with big fin have also been conducted to assure the validity of the steady algorithm.