Transitional boundary layer flow and heat transfer over blocked surfaces with influence of free stream velocity and block height

被引：0
作者：
O. Yemenici
Z. A. Firatoglu
机构：
[1] University of Uludag,Department of Mechanical Engineering
[2] University of Harran,Department of Mechanical Engineering
来源：
Heat and Mass Transfer | 2013年 / 49卷
关键词：
Heat Transfer; Nusselt Number; Turbulent Intensity; Flat Plate; Heat Transfer Characteristic;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Velocity, turbulent intensity, static pressure and temperature measurements over the flat plate and blocked surfaces were investigated in a low speed wind tunnel in the presence of free stream velocity and block height. The experiments were carried out for free stream velocities of 5, 7 and 10 m/s encompassing the transitional region and for block heights of 10, 15 and 20 mm forming the different flow samples. A constant-temperature anemometer, a micro-manometer and copper-constant thermocouples were used for measurements of velocity and turbulent intensity, static pressure and temperature, respectively. The results showed that the flow separations and reattachments occurred on the blocked surfaces which enhanced the average heat transfer up to 1.54, 1.71 and 1.84 fold of the flat plate value at 5 m/s for the rising block height, 1.49, 1.68 and 1.80 at 7 m/s, and 1.44, 1.63 and 1.78 at 10 m/s, respectively.
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页码：1637 / 1646
页数：9
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