Experimental investigation on heat transfer enhancement from an inclined heated cylinder with constant heat input power in infrasonic pulsating flows

被引：18

作者：

Li, Guoneng ^{[1
]}

Zheng, Youqu ^{[1
]}

Hu, Guilin ^{[1
]}

Zhang, Zhiguo ^{[1
]}

机构：

[1] Zhejiang Univ Sci & Technol, Hangzhou 310023, Zhejiang, Peoples R China

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2013年 / 49卷

基金：

中国国家自然科学基金;

关键词：

Pulsating flow; Heat transfer enhancement; Inclined cylinder; Infrasonic frequency; TURBULENT-FLOW; CHANNEL; CONVECTION; PIPE; WALL; AIR; FLUID;

D O I：

10.1016/j.expthermflusci.2013.04.003

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Experiments were carried out to study the heat transfer performance of an inclined heated cylinder in pulsating flows. An empirical equation was developed that correlates the heat transfer enhancement factor to the infrasonic pulsating frequency (f = 6-20 Hz), Reynolds number (Re = 71-282), pressure amplitude (p(rms) = 9-22 Pa), and inclination angle (theta = 0-90 degrees). The heat transfer enhancement factor was found to decrease with the Strouhal number, and increase in trend with the inclination angle. In addition, a critical frequency (f(cr) approximate to 14-18 Hz) was observed, below which the heat transfer enhancement factor decreases in trend with the Reynolds number, but it increases in trend with the Reynolds number when the frequency is above the critical frequency. (c) 2013 Elsevier Inc. All rights reserved.

引用

页码：75 / 85

页数：11

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