JME_V3_N4_RP2 Ghobad Shafiei Sabet S. Pavithran R.R. Kulkarni Journal on Mechanical Engineering 2249 - 0744 3 4 14 24 Heat Transfer Enhancement, Diffuser, Vortex Generator The experimental investigation of heat transfer enhancement and flow analysis in a diffuser using Vortex Generators (Vgs) is carried out. Two diffuser angles are inspected. One and two vortex pairs are considered. The velocity profile at the diffuser inlet is uniform and the flow is a developing one. The Vortex Generators are placed on the side vertical side wall, near the diffuser inlet. It is observed that the heat transfer enhancement is more with the two pair case. The Reynolds 5 number is in the range 2.5-3.6×10 . The maximum enhancement is 83% at constant Reynolds Number and 57% at constant dissipation. The diffuser efficiency is lower for the rough cases, with the two pair case yielding a lower value. The enhancement increases with the angle of attack of the Vortex Generator. August - October 2013 Copyright © 2013 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2484