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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

ANALYSIS OF TURBULENT CONVECTIVE HEAT TRANSFER FROM RECTANGULAR BAFFLES BY TAGUCHI METHOD

B. Sahin
Ataturk University, Erzurum, 25030, Turkey

A. Bayrakceken
Bayburt University, Bayburt, 69000, Turkey

Eyuphan Manay
Dept. of Mech. Eng, Faculty of Eng&Arc., Technical Univ. of Erzurum, Erzurum, Turkey

I. Ates
Erzurum Technical University, Erzurum, 25050, Turkey

Abstract

In this study, the effects of the rectangular baffles mounted on the bottom surface of a heat exchanger on the heat and pressure drop characteristics were investigated using the Taguchi experimental-design method. Nusselt number and friction factor were considered as performance parameters. An L18(21 *35) orthogonal array was selected as an experimental plan for the six parameters: corner angle (α), inclination angle (β), baffle height (H), baffle length (L), baffle width (S) and Reynolds number. First of all, each goal was optimized, separately. Then, all the goals were optimized together, considering the priority of the goals. The presence of the rectangular cross sectioned baffles caused higher pressure drop than that of the smooth channel. It was concluded that increasing inclination angle and corner angle caused heat transfer to decrease. The length of the baffle was found to be the most influential parameter on friction factor. Likewise, it was concluded that the most affected parameter on the heat transfer was Reynolds number.

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