Experimental Study of Concentric Staggered Annular Fin with Radial Outlet and Staggered Rectangular Fin with Lateral Outlet

Mr. Fazlar Rahman, Md. Muyeedur Rahman, Mr. Khaled Bin Yousuf, Mr. Ragib Anzum Sibat, Md. Shariful Islam, Armina Rahman Mim

Abstract


In this paper, an experimental study of a concentric staggered annular fin with radial outlets and a staggered rectangular fin with lateral outlets for steady-state natural convection, and forced convection is presented. The objective of this work is to investigate the effect of shape, profile and arrangement of the fins in heat transfer with minimum blockage ratio, stagnation, and pressure drop. In this regard, the two different shapes of fins are designed with the same material, identical extended surface area, width, and thickness; and studied experimentally with identical thermal load and boundary conditions, as well as identical flow characteristics. In case of forced convection, the orientation of the base-plate of the fins is kept perpendicular to the direction of flow to achieve velocity vectors parallel to the fin surfaces. The overall heat transfer coefficient, fin efficiency, effectiveness, and temperature distribution of both fins are compared for different base-plate's temperature of the fins and different free stream air velocity; and also for natural convection. It is found that the shape of the fins has a significant effect on heat transfer, especially in the case of forced convection. Though both fins are performed almost the same in natural convection, the concentric staggered annular fin with radial outlets performed better in forced convection. It is concluded that the concentric staggered annular fin with radial outlets can be used in the practical field instead of the conventional rectangular fin, particularly for forced convection.


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References


Nguyen, H., A. Aziz (1992), "Heat transfer from convecting-radiating fins of different profile shapes", Wärme-und Stoffübertragung,. Volume 27, Issue 2, pp. 67−72.

Hong, S.K., D.-H. Rhee, H.H. Cho (2005), "Effects of fin shapes and arrangements on heat transfer for impingement/effusion cooling with crossflow", in ASME Turbo Expo 2005: Power for Land, Sea, and Air. American Society of Mechanical Engineers.

Kraus, A.D. (1988), "Sixty-five years of extended surface technology (1922–1987)", Applied Mechanics Reviews, Volume 41, Issue 9, pp. 321−364.

Lorenzini, G., S. Moretti (2017), "Numerical analysis on heat removal from Y-shaped fins: Efficiency and volume occupied for a new approach to performance optimisation", International Journal of Thermal Sciences, Volume 46, Issue 6, pp. 573−579.

Reddy, R.S.k., et al., "Thermal Analysis of Pin Fin with Different Shape Forms using ANSYS", International Journal of Engineering Science and Computing (IJESC), Volume 7, Issue 5.

A/K Abu-Hijleh, B. (2003), "Numerical simulation of forced convection heat transfer from a cylinder with high conductivity radial fins in cross-flow. International Journal of Thermal Sciences", Volume 42, Issue 8, pp. 741−748.

Kim, Y.H., et al. (2004), "Effects of fin and tube alignment on the heat transfer performance of finned-tube heat exchangers with large fin pitch"

Asadi, M., R.H. Khoshkho (2013), "Temperature distribution along a constant cross sectional area fin", International Journal of Mechanics

and Applications, Volume 3, Issue 5, pp. 131−137.

Starner, K., H. McManus (1963), "An experimental investigation of free-convection heat transfer from rectangular-fin arrays", Journal of Heat Transfer, Volume 85, Isssue 3, pp. 273−277.

İzci, T., M. Koz, A. Koşar (2015), "The effect of micro pin-fin shape on thermal and hydraulic performance of micro pin-fin heat sinks", Heat Transfer Engineering, Volume 36, Issue 17, pp. 1447−1457.


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