Measurements are reported of the film cooling effectiveness and heat transfer following injection of air into a mainstream of air. A single row of circular injection holes inclined at an angle of 35 deg is used with a lateral spacing between the holes of three diameters. A low Reynolds number mainstream permits studying the influence of a laminar approaching boundary layer. Measurements of the surface heat transfer taken with no injection indicate that the hole openings can effectively trip the laminar boundary layer into a turbulent flow. The type of the approaching boundary layer has relatively little influence on either the adiabatic effectiveness or the heat transfer with film cooling.
|Original language||English (US)|
|Journal||American Society of Mechanical Engineers (Paper)|
|Issue number||81 -HT-38|
|State||Published - Jan 1 1981|