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Convective heat transfer in cross-corrugated triangular ducts under uniform heat flux boundary conditions

机译:在均匀热通量边界条件下交叉波纹三角管中的对流传热

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摘要

Cross-corrugated triangular ducts provide high heat mass transfer capabilities in membrane based air-to-air heat mass exchangers. The mixing effect would intensify the convective heat mass transfer coefficients on membrane surfaces. In this study, the fluid flow and convective heat transfer in a cross-corrugated triangular duct under uniform heat flux boundary condition is modeled and experimentally studied. A low Reynolds number k-ω (LKW) turbulence model is employed to account for the turbulence in the flow. Heat transfer experiments and high speed hot wire anemometry technology are used to validate the model. The transitional behavior of fluid flow in the duct is disclosed by velocity measurements and Fourier transforms. Correlations are provided for estimation of the pressure drop and the mean Nus-selt numbers under uniform heat flux boundary conditions. The established correlations can be extended to estimate the convective mass transfer coefficients through heat mass analogy.
机译:交叉波纹三角管在基于膜的空气对空气热交换器中提供了很高的热量传递能力。混合效应将增强膜表面上的对流传热系数。在这项研究中,对在均匀热通量边界条件下交叉波纹三角管中的流体流动和对流换热进行了建模和实验研究。低雷诺数k-ω(LKW)湍流模型用于说明流动中的湍流。使用传热实验和高速热丝风速测定技术来验证模型。管道中流体流动的过渡行为通过速度测量和傅立叶变换来揭示。提供相关性以估计均匀热通量边界条件下的压降和平均Nus-selt数。可以建立已建立的相关性,以通过热质类比估算对流传质系数。

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