experimental study on heat transfer from a perforated fin array with cross perforations

experimental study is performed to analyze heat transfer characteristics as well as thermal performance of a new type of perforated fin with cross openings. for measurements, an array of these fins over a flat surface is made from aluminum and two cross circular holes are drilled in each fin. the tests are conducted in a wind tunnel which produces uniform air motion upstream of the test case. temperature measurements are carried out by means of calibrated thermocouples system and surface temperature measurement is determined by a thermograph imager. results of thermal structure and heat transfer are plotted for reynolds numbers 2×10⁴- 4.6×10⁴ based on the fin length.