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首页> 外文期刊>International Journal of Heat and Mass Transfer >Natural convection in an oscillating cylindrical enclosure with pin fins
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Natural convection in an oscillating cylindrical enclosure with pin fins

机译：带有针状鳍片的振荡圆柱形外壳中的自然对流

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摘要

This study experimentally investigated natural convection in an oscillating cylindrical enclosure to simulate heat transfer inside a buoy of a wave power generator. Mechanical oscillations were applied vertically to simulate the operating conditions of a wave power generator extracting energy from the surface motion of ocean waves. The Rayleigh numbers used in this study ranged from 50,000 to 600,000. Enclosures of various heights H (2.5, 3, 4, and 5 cm) and oscillations of various frequencies (1 and 2 Hz) were investigated. In addition, pin fins of length L were attached to the heat transfer area, and the heat transfer coefficient variation was examined at various L/H ratios (0.4, 0.33, 0.25, and 0.2). The results indicate that the pin fins enhanced the heat transfer under both stationary and oscillating conditions by up to 30%. The mechanical oscillation did not cause considerable changes in heat transfer based on the tested parameters, and the maximal heat transfer variation was less than 10%.
机译：这项研究通过实验研究了振荡圆柱形外壳中的自然对流，以模拟波浪发电机浮标内部的热传递。垂直施加机械振动，以模拟波浪发电机从海浪表面运动中提取能量的运行条件。本研究中使用的瑞利数范围为50,000至600,000。研究了各种高度H（2.5、3、4和5 cm）的外壳以及各种频率（1和2 Hz）的振荡。另外，将长度为L的针状翅片附接到传热区域，并且以各种L / H比（0.4、0.33、0.25和0.2）检查了传热系数变化。结果表明，在固定和振荡条件下，针状翅片都可以将热量传递提高30％。根据所测试的参数，机械振荡不会引起传热的显着变化，并且最大传热变化小于10％。

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