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An Experimental Study of Heat Transfer Enhancement in the Perforated Rectangular Fin

Lalta Prasad, Ashwani Kumar, Sonika Tewari


The main objective of this study is to understand the effect of number of perforations on convective heat transfer experimentally investigated. Perforations in the fins are one way that used to improve its effectiveness. In this study, the steady state heat transfer from the solid fin and perforated fin arrays are measured. The  temperature  drop  along  the  perforated  fin  length  is  consistently  higher  than that  for  the  equivalent  non – perforated  fin. The inlet temperature of the cylinder core was in the rage of 353oC-953oC for voltage range 100 V to 220 V. The heat transfer depends on the porosity of the fin. Heat dissipation rate is increased in the range of 20% to 70% with increase in the number of perforations (24 to 60) up to certain level. If further increase in perforation numbers this leads to reduction of the heat dissipation from the fin.


Heat transfer enhancement; Perforation numbers; Natural convection; heat transfer coefficient; Fin array

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