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首页> 外文期刊>Journal of Heat Transfer >Influence of Geometrical Parameters on Heat Transfer of Transversely Corrugated Helically Coiled Tube for Deicing Fluid
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Influence of Geometrical Parameters on Heat Transfer of Transversely Corrugated Helically Coiled Tube for Deicing Fluid

机译：几何参数对横向波纹螺旋螺旋管传热进行除冰流体的影响

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摘要

In order to ensure flight safety in cold winter, aircraft ground deicing is crucial and necessary. In Chinese deicing fluid heating system, the helically coiled tube is paramount exchanger to heat deicing fluid. The deicing fluid is ethylene-glycol-based mixture with high viscosity. Aiming at heat transfer enhancement of deicing fluid, ring rib is formed by an embossed tube wall toward the internal of the tube; thus, transversely corrugated helically coiled tube (TCHC) is achieved. Depth and width are two key geometrical parameters of ring rib. Based on field synergy principle, the influence of depth-diameter ratio (H/D) and width-diameter ratio (w/D) is investigated through numerical simulation. The results show that outlet temperature, mean convection heat transfer coefficient, and Nusselt number have similar trends, which first increase and then decrease nonlinearly. The variation of flow resistance coefficient is inversely proportional to Reynolds number. Especially, the effect of H/D is more significant than that of w/D. Field synergy angle and velocity field are also analyzed to reveal the mechanism of heat transfer. TCHC performs better than the original tube. Orthogonal experiment calculates the outlet temperature of TCHC when H/D and w/D change. The combination of H/D = 0.075 and w/D = 0.5 is best solution. TCHC effectively enhances heat transfer of deicing fluid. Therefore, TCHC is beneficial to improve the deicing efficiency and ensure the flight punctuality.
机译：为了确保寒冷的冬季飞行安全，飞机地面除冰至关重要和必要。在中国除模流体加热系统中，螺旋盘绕管是散热流体的最重要的交换器。除冰流体是具有高粘度的乙二醇基混合物。旨在瞄准除冰流体的传热增强，环肋由压花管壁朝向管内形成;因此，实现了横向瓦楞螺旋盘管（TCHC）。深度和宽度是环形肋的两个关键几何参数。基于现场协同原理，通过数值模拟研究了深度直径比（H / D）和宽度直径比（W / D）的影响。结果表明，出口温度，平均对流传热系数和纽带数具有相似的趋势，首先是增加，然后不连续地减少。流动性系数的变化与雷诺数成反比。特别是，H / D的效果比w / d更大。还分析了现场协同角度和速度场，以揭示传热机制。 TCHC比原来的管更好。正交实验计算H / D和W / D变化时TCHC的出口温度。 H / D = 0.075和W / D = 0.5的组合是最佳解决方案。 TCHC有效地增强了除冰流体的热传递。因此，TCHC有利于提高除冰效率并确保飞行刺点。

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