Experimental Study of Performance of Pin Fin Heat Sink under Forced Convection

An experimental investigation was performed to study the heat transfer and pressure loss characteristics in a horizontal rectangular wind tunnel having attachment of cylindrical, grooved cylindrical and perforated pin fins over a horizontal based pin fin assembly. The experiments covered the rates from 2000-25,000 and the clearance ratio (C/H) = 0.0. In-line Pin fin arrangements were studied for one constant span wise pitch (Sx /d=1.2) and three different stream wise pitch (Sy /d = 1.2, 2.4 and 3.6) distance. Nusselt number and pressure drop were considered as performance parameters. The performance of all the pin fins compared to each other. The maximum enhancement in Nusselt number corresponds to the grooved cylindrical fin and the results were matching with previous reports.

[1]  M. Hamdan,et al.  Enhanced Heat Transfer, Missing Pin, and Optimization for Cylindrical Pin Fin Arrays , 1993 .

[2]  Forrest E. Ames,et al.  Turbulent Augmentation of Internal Convection Over Pins in Staggered Pin Fin Arrays , 2004 .

[3]  Mehmet Yilmaz,et al.  Heat-transfer enhancement in a channel flow with perforated rectangular blocks , 2001 .

[4]  Mahmood Yaghoubi,et al.  Thermal enhancement from heat sinks by using perforated fins , 2009 .

[5]  S. Chang,et al.  Endwall heat transfer and pressure drop in rectangular channels with attached and detached circular pin-fin array , 2008 .

[6]  D. Metzger,et al.  Effects of Pin Shape and Array Orientation on Heat Transfer and Pressure Loss in Pin Fin Arrays , 1984 .

[7]  B. Sahin,et al.  Thermal performance analysis and optimum design parameters of heat exchanger having perforated pin fins , 2008 .

[8]  Srinath V. Ekkad,et al.  Effect of pin fin to channel height ratio and pin fin geometry on heat transfer performance for flow in rectangular channels , 2014 .

[9]  M. Chyu.  Heat Transfer and Pressure Drop for Short Pin-Fin Arrays With Pin-Endwall Fillet , 1989 .

[10]  C. Wood,et al.  Thermal-hydraulic characteristics of a heat exchanger: The vertical rectangular fins being aligned parallel to the mean air-flow in the duct , 1988 .

[11]  S. Probert,et al.  Heat transfers from pin-fin arrays experiencing forced convection , 2000 .

[12]  Giovanni Tanda,et al.  Heat transfer and pressure drop in a rectangular channel with diamond-shaped elements , 2001 .

[13]  J. Wolfersdorf,et al.  Endwall heat transfer and pressure loss measurements in staggered arrays of adiabatic pin fins , 2016 .

[14]  S. D. Probert,et al.  Forced steady-state convections from pin-fin arrays , 1994 .

[15]  A. Patil,et al.  Heat Transfer Characteristics of Grooved Fin Under Forced Convection , 2015 .