Experimental and numerical investigations on baffle assisted jet array impingement cooling with cross-flow
by Sabu Kurian; P.S. Tide; N. Biju
International Journal of Energy Technology and Policy (IJETP), Vol. 17, No. 4, 2021

Abstract: Jet impingement is a powerful technique for enhancement of convective heat transfer. In this study, an attempt has been made to investigate the combined effect of jet impingement with cross-flow and insertion of baffles. The fluid flow and heat transfer characteristics of a 3 × 3 array of multiple impinging steady air jets together with cross-flow and baffles subjected to a constant heat flux are investigated numerically and experimentally. Numerical simulations employing SST k-ω turbulence model are utilised to investigate the effect of blow ratio and baffle clearance on flow dynamics and heat transfer characteristics. Experiments and numerical simulations were carried out with blow ratio ranging from 0.25 to 1.0 and baffle clearance of 1 mm, 2 mm and 3 mm. Insertion of baffles in the cross-flow path is found to augment heat transport. About three times increase in heat transfer rate was observed when baffles with 1 mm clearance and a blow ratio of 1.0 were employed. A correlation analysis based on statistical techniques was carried out to quantitatively express the relation between operating parameters such as blow ratio, baffle clearance, H/d ratio and Nusselt number.

Online publication date: Thu, 21-Oct-2021

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