Enhancement of heat transfer performance of a channel flow using modified delta Winglet vortex generator

ABSTRACT

A modified delta winglet vortex generator is designed and developed for the enhancement of heat transfer of a channel flow in a wind tunnel to prevent damage due to overheating of equipments. The modified delta winglet used in this study provided efficient control and early cooling mechanism over the conventional delta winglet which is generally used in various sectors such as aerodynamics, automobiles, electronics, and mechanics. The modified delta winglet was studied at 9000 Reynolds number for four different positions such as common flow down at downstream, common flow up at downstream, common flow down at upstream, and common flow up at upstream. The experimental results analysis depicts the highest Nusselt numbers and Colburn’s factor at a configuration of CFD_U. The results showed an improvement in the overall rate of heat transfer which was further analysed by the convection heat transfer coefficient value.

Abbreviations: CFU: Common flow up; CFD: Common flow down; CFU_U: Common flow up configuration at upstream; CFU_D: Common flow up configuration at downstream; CFD_U: Common flow down configuration at upstream; CFD_D: Common flow down configuration at downstream; MDWCH: Modified delta winglet vortex generator; DWCH: Delta winglet with a circular hole; L: Channel flow length; W: Channel flow width; t: Channel flow thickness; Fp: Channel pitch; x: Longitudinal vortex generator position; y: Transverse vortex generator position; α: DWCH attack angle; L_g: DWCH length; H_g: DWCH height; H_d: DWCH Diagonal; t_g: DWCH thickness; d: Hole diameter

KEYWORDS:

• Modified delta winglet vortex generator
• channel flow
• heat transfer performance
• Nusselt number
• Reynolds’s number
• Colburn’s factor

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data Availability Statement

The authors confirm that the data supporting the findings of this study are available within the article [and/or] its supplementary materials.

Correction Statement

This article has been corrected with minor changes. These changes do not impact the academic content of the article.