FLOW AND HEAT TRANSFER CHARACTERISTICS AROUND AN ELLIPTIC CYLINDER PLACED IN FRONT OF A CURVED PLATE

An experimental investigation has been conducted to clarify heat transfer characteristics and flow behaviors around an elliptic cylinder. Also, flow visualization was carried out to clarify the flow patterns around the cylinder. The elliptic cylinder examined has an axis ratio of 1:2.17, was placed in the focus of a parabolic plate. The test fluid is air and the Reynolds number based on the major axis length, ranged from 5.10(3) to 3.10(4). The angle of attack was changed from 0 degrees to 90 degrees at 15 degrees interval. It is found that the pressure distribution, form drag, location of separation point, and heat transfer coefficient depend strongly upon the angle of attack Over the Reynolds number range examined, the mean heat transfer coefficient is at its highest at alpha = 60 degrees-90 degrees. The values of heat transfer coefficient in the case of free cylinder are higher than those for cylinder/plate combination at all angles of attack and Reynolds number range examined.