Experimental Analysis Of Heat Transfer Over Compound Dimpled-Ribbed Surface

Paper Topic :

Ad hoc networks for pervasive communications

Author Name :

Pavan Jadhao S.H.Mankar

Abstract :

The variation of the heat transfer coefficients in the channel with both angled ribs and dimples is measured using the experimental setup. To make the comparison, heat transfer coefficients for dimpled plate and ribbed plates were also presented. The channel aspect ratio was kept 2. The rib pitch is 50 mm, rib angles are 900,600 and 400, dimple diameter, and dimple center-to-center distance was 5 mm, and 8 mm, respectively. The Reynolds number based on the channel hydraulic diameter ranged between 12,000 and 30,000. Experimental Results show that the distribution of heat transfer coefficient was asymmetric due to the secondary flow induced by the ribs provided with different angles. Also, dimples produced between the ribs increased the heat coefficient with a considerable increase in pressure drop. Thus, the compound cooling technique with angled rib sand dimples should be considered as a one of the solution for improving the heat transfer performance of a gas turbine blade cooling technique.

Download Article