The role of turbulence length scale and turbulence intensity on forced convection from a heated horizontal circular cylinder

被引：50

作者：

Sak, C. ^{[1
]}

Liu, R. ^{[1
]}

Ting, D. S. -K. ^{[1
]}

Rankin, G. W. ^{[1
]}

机构：

[1] Univ Windsor, Dept Mech Automot & Mat Engn, Windsor, ON N9B 3P4, Canada

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2007年 / 31卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

circular cylinder; turbulence length scale; turbulence intensity; convective heat transfer; FREE-STREAM TURBULENCE; MASS-TRANSFER; CROSS-FLOW; TRANSFER COEFFICIENTS; SURFACE; AIR;

D O I：

10.1016/j.expthermflusci.2006.04.007

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The effects of turbulence integral length scale and turbulence intensity on the convective heat transfer rate from a heated circular cylinder in crossflow of air were investigated. An aluminium cylinder of diameter 50.8 cm (2") and with uniform surface temperature was placed horizontally in a wind tunnel. The cylinder was subjected to a homogeneous, isotropic turbulent flow, which was generated using a perforated plate. The cylinder surface temperature was monitored and measured with five embedded thermocouples. Tests were conducted at a Reynolds number of 27,700, relative turbulence intensity, Tu from 2.9% to 8.3% and turbulence integral length scale to cylinder diameter ratio, L/D from 0.50 to 1.47. For L/D = 0.78, heat transfer increased with increasing turbulence intensity, whereas for Tu = 6.9%, heat transfer decreased with increasing turbulence length scale. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：279 / 289

页数：11

共 29 条

[1]

BARRETT MJ, 1999, P 33 NAT HEAT TRANSF

[2]

Cengel YA., 1998, HEAT TRANSFER PRACTI

[3] CORRELATING EQUATION FOR FORCED-CONVECTION FROM GASES AND LIQUIDS TO A CIRCULAR-CYLINDER IN CROSS-FLOW [J].

CHURCHILL, SW ;

BERNSTEIN, M .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1977, 99 (02) :300-306

[4] OSCILLATING GRIDS AS A SOURCE OF NEARLY ISOTROPIC TURBULENCE [J].

DESILVA, IPD ;

FERNANDO, HJS .

PHYSICS OF FLUIDS, 1994, 6 (07) :2455-2464

[5]

Figliola R.S., 1991, THEORY DESIGN MECH M

[6] ENHANCEMENT OF STAGNATION FLOW HEAT AND MASS-TRANSFER THROUGH INTERACTIONS OF FREE STREAM TURBULENCE [J].

GALLOWAY, TR .

AICHE JOURNAL, 1973, 19 (03) :608-617

[7]

Gorla R.S.R., 1982, P 7 INT HEAT TRANSF, V3, P153

[8]

Incropera F.P., 1990, FUNDAMENTALS HEAT MA

[9]

Kline S.J., 1952, ASME Mechanical Engineering, V75, P3

[10] HEAT AND MASS-TRANSFER COEFFICIENTS AT THE SURFACE OF ELLIPTIC CYLINDERS PLACED IN A TURBULENT AIR-FLOW [J].

KONDJOYAN, A ;

DAUDIN, JD ;

BIMBENET, JJ .

JOURNAL OF FOOD ENGINEERING, 1993, 20 (04) :339-367

← 1 2 3 →