Experimental Investigation on Heat Transfer Enhancement by Swirl Generators in a Solar Air Heater Duct

被引：13

作者：

Bhattacharyya, Suvanjan ^{[1
]}

Chattopadhyay, Himadri ^{[1
]}

Bandyopadhyay, Satyaki ^{[2
]}

Roy, Sourodeep ^{[2
]}

Pal, Anirban ^{[2
]}

Bhattacharjee, Sarbojit ^{[2
]}

机构：

[1] Jadavpur Univ, Dept Mech Engn, Kolkata, W Bengal, India

[2] Seacom Engn Coll, Dept Mech Engn, Howrah, W Bengal, India

来源：

INTERNATIONAL JOURNAL OF HEAT AND TECHNOLOGY | 2016年 / 34卷 / 02期

关键词：

Forced convection; Heat transfer enhancement; Solar air preheater; Bluff; Cylinders; Swirl flow;

D O I：

10.18280/ijht.340206

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Experimental investigations on heat transfer enhancement by swirl generators are presented. The thermo hydraulic performance has been evaluated. The experiments were conducted over a wide range of Reynolds number from 993 to 12,034 by employing air (Pr = 0.7) as the working fluid. The major findings of this experimental investigation are that the circular grooved tube with different diameter ratio (h = d/D = 0.04 and 0.06) and pitch ratio (y = p/D = 1.5 and 3.0) perform better than the smooth duct. In evaluation of thermal performance, it is seen that the bluff cylinder of (y = 1.5, h = 0.06) are thermodynamically advantageous than the other roughness used. The result is useful for heat exchanger, solar air-heater, etc.

引用

页码：191 / 196

页数：6

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