Multiple Jets Exhausting into a Crossflow

Abstract

An analytical model for the flow of a jet exhausting normally into a crossflow has been generalized. The continuity and momentum equations are solved for the jet path and then the velocity field induced by the jet is evaluated by replacing the jet with a sink-doublet singularity distribution, accounting for the entrainment of mainstream fluid and the blockage effect of the jet. For a multiple jet configuration, the influence of an upstream jet on a downstream jet is represented by a reduced mainstream velocity in the equations of motion. Continuity and momentum considerations yield initial conditions for resultant jets after intersection. Good agreement between theory and available experimental data on jet centerlines and surface pressure distributions is obtained.