ENHANCEMENT OF HEAT TRANSFER FROM FLAT PLATE BY USING RIBS ARRAY IN AN IMPINGING JET SYSTEM

 للكاتبين :

E.A. El Kady1 M.A. Saleh2and R.I. Afify3

1Associate prof. , Mech. Eng. Dept., Al Azhar university

2Assistant lecture, Mech. Eng. Dept., Al Azhar university

3Mech. Eng. Dept., Banha university

ABSTRACT

The present experimental work concerns with forced convection heat transfer from

vertical flat plate heated at constant heat flux subjected to normal air jet. This

experimental work consists of two stages. The first stage considers the heat transfer

process when the heated vertical plate is smooth (without ribs). In the second stage,

the heated plate is augmented with vertical ribs to investigate the effect of such

technique on the enhancement of the heat transfer process. Each square rod in the

array (ribs) was positioned in a vertical plan normal to the flow direction and

parallel to the heated flat plate surface. Experiments were carried out at different

values of Reynolds number, Re ranged from 1.52E4 to 7.50E4. Also, results are

obtained for different geometrical actors; namely, the nozzle to plate spacing, s/b as

well as the pitch ratio, p/w.

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