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首页> 外文期刊>International journal of green energy >Heat transfer augmentation and flow characteristics in ribbed triangular duct solar air heater: An experimental analysis
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Heat transfer augmentation and flow characteristics in ribbed triangular duct solar air heater: An experimental analysis

机译：带肋三角管太阳能空气加热器的传热增加和流动特性：实验分析

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摘要

An experimental study has been carried out to analyze the effect of inclined ribs used as roughness element on heat transfer along its friction characteristics. The roughness parameters include relative roughness pitch (P/e) ranges from 4-16, relative roughness height (e/D-h) ranges from 0.021-0.043 and angle of attack () ranges from 30 degrees to 75 degrees. The Reynolds number (Re) lies in the range of 4500-28000. The heat transfer and friction factor data obtained from the experiment and it is compared with the data obtained from smooth duct under the same conditions. Considerable augmentation was observed in heat transfer and friction over the smooth duct. Correlation was also developed for Nusselt number (Nu) and friction factor (f) as a function of roughness and flow parameter.
机译：已经进行了实验研究以分析用作粗糙元件的倾斜肋沿其摩擦特性对热传递的影响。粗糙度参数包括相对粗糙度间距（P / e）为4至16，相对粗糙度高度（e / D-h）为0.021-0.043，迎角（）为30度至75度。雷诺数（Re）在4500-28000之间。从实验中获得的传热和摩擦系数数据与在相同条件下从光滑管道获得的数据进行比较。在光滑管上的传热和摩擦中观察到明显增加。还开发了作为粗糙​​度和流动参数的函数的努塞尔数（Nu）和摩擦系数（f）的相关性。

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