PENETRATION OF AIR JETS ISSUING FROM CIRCULAR, SQUARE, AND ELLIPTICAL ORIFICES DIRECTED PERPENDICULARLY TO AN AIR STREAM

摘要

An experimental investigation was conducted to determine the penetration of air jets directed perpendicularly to an air stream. Jets issuing from circular, square, and elliptical orifices' were investigated and the Jet penetration at a position downstream of the orifice was determined as a function of Jet density, Jet velocity, air-stream density, air-stream velocity, effective Jet diameter, and orifice flow coefficient. The Jet penetrations were determined for nearly constant values of air-stream density at three tunnel-air velocities and for a large range of Jet vel­ocities and densities. The results were correlated in terms of dimensionless parameters and the penetrations of the various shapes were compared.