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首页> 外文会议>7th Biennial Conference on Engineering Systems Design and Analysis 2004(ESDA 2004) vol.1: Advanced Energy Systems; Advanced Heat Transfer in Engineering Systems; ... >HEAT TRANSFER IN A ROTATING SQUARE-SECTIONED CHANNEL FITTED WITH IN-LINE RIBS
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HEAT TRANSFER IN A ROTATING SQUARE-SECTIONED CHANNEL FITTED WITH IN-LINE RIBS

机译：装有直角肋的旋转方形截面通道中的传热

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摘要

This investigation studies convective heat transfer in a square-sectioned duct that rotates about an axis perpendicular to the central axis of the duct. The leading and trailing sides of the duct are fitted with in-line ribs aligned at 45° to the central axis of the duct. The leading and trailing edges are heated and the two remaining sidewalls of the duct are adiabatic. Air is the coolant used and the direction of flow is in the radial outward direction. The duct simulates the flow and heat transfer that occurs in the passages of cooled turbine rotor blades. The presentation of results is in itself a non-trivial task as the heat transfer is a function of three independent parameters. It is shown how the performance of the section may be expressed in terms of a reduced temperature parameter and that this approach offers additional insight as compared to the conventional Nusselt number approach (which may be obtained by a simple transformation. The investigation has produced a range of experimental data to aid the validation of CFD codes designed to predict heat transfer in this class of rotating duct. Additionally empirical correlations for heat transfer on the leading and trailing edges are proposed that uncouple the individual effects of Coriolis forces and centripetal buoyancy.
机译：这项研究研究了方形截面管道中的对流传热，该管道绕垂直于管道中心轴的轴旋转。管道的前侧和后侧均装有与管道中心轴成45°对齐的直排肋。前缘和后缘被加热，并且导管的两个剩余侧壁是绝热的。空气是所使用的冷却剂，其流动方向是径向向外。管道模拟在冷却的涡轮转子叶片通道中发生的流动和传热。结果的呈现本身并不是一件容易的事，因为传热是三个独立参数的函数。它显示了如何以降低的温度参数来表示截面的性能，并且与常规的Nusselt数方法（可以通过简单的转换获得）相比，该方法提供了更多的见解。研究得出了一个范围实验数据，以帮助验证用于预测此类旋转管道传热的CFD代码；此外，还提出了前缘和后缘传热的经验相关性，以消除科里奥利力和向心浮力的个体影响。

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