EXPERIMENTAL INVESTIGATION OF CORONA WIND HEAT-TRANSFER ENHANCEMENT WITH A HEATED HORIZONTAL FLAT-PLATE

被引：91

作者：

OWSENEK, BL

SEYEDYAGOOBI, J

PAGE, RH

机构：

[1] Drying Research Center, Department of Mechanical Engineering, Texas A&M University, College Station, TX

来源：

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME | 1995年 / 117卷 / 02期

关键词：

AUGMENTATION AND ENHANCEMENT; MEASUREMENT TECHNIQUES; NATURAL CONVECTION;

D O I：

10.1115/1.2822522

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Corona wind enhancement of free convection was investigated with the needle-plate geometry in air. High voltage was applied to a needle suspended above a heated plate, and heat transfer coefficients were computed by measuring the plate surface tempera ture distribution with an infrared camera. Local heat transfer coefficients greater; than 65 W/m(2) K were measured, an enhancement of more than 25:1 over natural convection. The enhancement extended over a significant area, often reaching beyond the 30 cm measurement radius at high power levels, Joule heating significantly reduced the effective impingement point heat transfer coefficient. The corona wind was found to be more efficient with positive potential than with negative. The heat transfer efficiency, was optimized with respect to electrode height and applied voltage. The needle-place heat transfer effectiveness improved rapidly with Increasing height, and became relatively insensitive to height above a threshold value of about 5 cm.

引用

页码：309 / 315

页数：7

共 20 条

[1]

Behm J., Electrostatic Precipitators, (1982)

[2]

Chattoek A.P., On the Velocity and Mass of Ions in the Electric Wind in Air, Phil Magazine, 48, pp. 401-420, (1899)

[3]

Davidson J.H., Shaughnessy E.J., Turbulence Generation by Electric Body Forces, Experiments in Fluids, 4, pp. 17-26, (1986)

[4]

Frank M.E., Effect of Vortices Induced by Corona Discharge on Free-ConvectionH eat Transfer From a Vertical Plate, ASMEJ OURNALOFH EATT RANSFER, 91, pp. 427-433, (1969)

[5]

Franke M.E., Hague L.E., Electrostatic Cooling of a Horizontal Cylinder, ASMEJ OURNALOFH EATT RANSFER, 113, pp. 544-548, (1991)

[6]

Hauksbee F., Physico-Mechanical Experiments on Various Sabjects, pp. 46-47, (1719)

[7]

Hay J.C., The Electric Field and Vorticity Production in a Wire-Plate Precipitator with Uniform Discharge, (1984)

[8]

Kulacki F.A., Electrohydrodynamical Enhancement of Convective Heat Transfer, Advances in Transport Processes, 2, (1982)

[9]

Loeb L.B., Electrical Coronas: Their Basic Physical Mechanisms, (1965)

[10]

Marco S.M., Velkoff H.R., Effect of Electrostatic Fields on Free Convection Heat Transfer from Flat Plates, (1963)

← 1 2 →