Hydrodynamics and heat transfer of yawed circular cylinder

被引：7

作者：

Mityakov, Andrey ^{[1
]}

Mityakov, Vladimir ^{[1
]}

Sapozhnikov, Sergey ^{[1
]}

Gusakov, Andrey ^{[1
]}

Bashkatov, Aleksandr ^{[1
]}

Seroshtanov, Vladimir ^{[1
]}

Zainullina, Elsa ^{[1
]}

Babich, Aleksandr ^{[1
]}

机构：

[1] Peter Great St Petersburg Polytech Univ, Dept Thermophys Power Units, St Petersburg 195251, Russia

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2017年 / 115卷

关键词：

Heat flux sensors; Ply; Heat transfer; Cylinder; Hydrodynamics; WAKE;

D O I：

10.1016/j.ijheatmasstransfer.2017.07.055

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Hydrodynamics and heat transfer from single circular cylinder with yaw angle were examined in the current study. During the experiment the distribution of the Nusselt number on the surface and the 3D velocity field (using stereo-PIV) in the cylinder wake were acquired simultaneously. Experiments were conducted with constant wall temperature conditions, for yaw angles beta/degrees : 90 (cross-flow), 85, 75, 70, 65, 50 and 45; and Reynolds numbers Re :10(4),1.3 x 10(4),2.6 x 10(4), 4.7 x 10(4) and 7.9 x 10(4). The results showed the minimum in surface-averaged Nusselt number Nu for yaw angles fir between 70 and 65. For beta/degrees <= 65 surface-averaged Nusselt number (Nu) over bar increases up to 32% (at beta/degrees = 45, Re = 7.9 x 10(4)) compared with the cross-flow case. Both decrease and increase of (Nu) over bar is induced by changes of a flow pattern in the wake of the cylinder and, as a result, changes in a velocity field in the vicinity of a rear cylinder surface. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：333 / 339

页数：7

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