NACA Technical Notes

An experimental investigation was conducted to determine the temperature profiles downstream of heated air jets directed at angles of 90 deg, 60 deg, 45 deg, and 30 deg to an air stream. The profiles were determined\ud at two positions downstream of the jet as a function of jet diameter,\ud jet density, jet velocity, free-stream density, free-stream velocity,\ud jet total temperature, orifice flow coefficient, and jet angle. A\ud method is presented which yields a good approximation of the temperature\ud profile in terms of the flow and geometric conditions