Comparative study of effect of various blockage arrangements on thermal hydraulic performance in a roughened air passage

The aim of present article, experimental investigation of heat transfer and fluid flow characteristics in an air passage with different type of blockage arrangements as roughness elements employed over one wall. The different blockage arrangements such as transverse perforated blockage, angled perforated blockage, V-type solid blockage, V-type blockage with gap and V-type perforated blockage have been careful in the present study. During the experimental examination air was passed through the test passage under a uniform wall heat flux of the heated wall plate. The heat transfer and fluid flow behavior are presented for Re based on the passage hydraulic diameter ranging from 3000 to 18000. During the experimental study author found that the V-type perforated blockage provides better thermal hydraulic performance as compared with other type blockage air passage.