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Journal of Enhanced Heat Transfer

Impact factor: 0.400

ISSN Print: 1065-5131
ISSN Online: 1563-5074

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v11.i4.100
pages 325-330

Experimental Study on Heat Transfer Enhancement in Natural Convection in Limited Space by Using Delta-Winglet Longitudinal Vortex Generators

Guang-Chang Feng
College of Electric Power, South China University of Technology 510640, Guangzhou, China
Ze-Liang Yang
College of Electric Power, South China University of Technology 510640, Guangzhou, China
Tao Wang
State Key Laboratory of Clean Energy Utilization, Institute of Thermal Power Engineering, Zhejiang University, Hangzhou 310027

ABSTRACT

This paper focuses on the experimental study of heat transfer enhancement in vertical natural convection in a limited space by longitudinal vortex. In the experimental range of Grashof number, the effect of attack angle, the height and width of the winglet of longitudinal vortex generator (LVG) on the heat transfer performance are experimentally investigated, and the best attack angle has been obtained. Moreover, the effect of right-angle, triangle LVG, and low rectangular fins are compared, and the results show that the effect of right-angle triangle LVG is better than that of rectangular fins.