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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >HEAT TRANSFER AUGMENTATION IN AN OSCILLATING FLOW
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HEAT TRANSFER AUGMENTATION IN AN OSCILLATING FLOW

机译：振荡流动中的传热强化

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For combustors a heat transfer augmentation of two to five times higher than expected has been reported. Experiments, where the temperature profile in the tail pipe of the pulse combustor has been measured, give no indication why the heat transfer should be augmented. The objective is to study the heat transfer of an oscillating flow between two parallel plates. A set of governing equations is formulated from first principles. Analytical solutions can then be obtained for both the velocity and temperature fields for the special flow considered. The heat conduction vector can so be determined and the heat transfer at the plates over one cycle is found to be dependent of the frequency of the oscillations as well as the phase difference between the pressure and temperature oscillations. From the analysis it is found that for certain intervals of the phase difference and the frequency of the oscillations an augmented heat transfer can be found. This means that an augmented heating (or cooling) process can be arranged in a steady flow by superimposing oscillations.
机译：据报道，燃烧室的传热增加比预期高出2至5倍。实验已测量了脉冲燃烧器尾管中的温度分布，但没有说明为什么应增加传热。目的是研究两个平行板之间的振荡流的热传递。根据第一原理制定了一组控制方程。然后可以针对所考虑的特殊流获得速度场和温度场的解析解。这样就可以确定热传导矢量，并且发现在一个周期内在板上的热传递取决于振荡的频率以及压力和温度振荡之间的相位差。从分析中发现，对于相差和振荡频率的特定间隔，可以发现增加的热传递。这意味着可以通过叠加振荡以稳定的方式安排增强的加热（或冷却）过程。

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