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首页> 外文期刊>International Journal of Heat and Mass Transfer >Large eddy simulation of flow and heat transfer in a rotating ribbed channel
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Large eddy simulation of flow and heat transfer in a rotating ribbed channel

机译：旋转罗纹通道内流动和传热的大涡模拟

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摘要

The internal cooling passage of a gas turbine blade equipped with ribs is modeled as a rotating ribbed channel. The flow and heat transfer in the ribbed channel have been investigated by conducting large eddy simulations with a dynamic subgrid-scale model. The Reynolds number considered is 30,000 and rotation numbers are 0, 0.1 and 0.3. The time-averaged results show good agreement with the experimental data. By comparing the present data with those of the smooth channel, it is observed that the vortices shed from the rib induce strong wall-normal motions, and they are augmented on the trailing-wall side by the rotation, resulting in a significant increase in the heat transfer due to rotation. It is also shown that the similarity between the streamwise velocity and temperature is significantly destroyed by both the rotation and the rib itself.
机译：配备有肋的燃气涡轮叶片的内部冷却通道被建模为旋转的肋通道。通过使用动态亚网格规模模型进行大型涡流模拟，研究了带肋通道中的流动和传热。所考虑的雷诺数为30,000，旋转数为0、0.1和0.3。时间平均结果与实验数据吻合良好。通过将当前数据与平滑通道的数据进行比较，可以观察到从肋骨脱落的涡流会引起强烈的壁法向运动，并且通过旋转在后壁侧会增大涡流，从而导致涡流显着增加。旋转引起的热传递。还表明，旋转速度和肋本身都明显破坏了沿流速度和温度之间的相似性。

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