Accession Number : AD0421741

Title :   AN EXPERIMENTAL INVESTIGATION OF THE TURBULENT MIXING ON NON-HOMOGENEOUS COAXIAL JETS,

Corporate Author : POLYTECHNIC INST OF BROOKLYN N Y

Personal Author(s) : Alpinieri,Louis J.

Report Date : AUG 1963

Pagination or Media Count : 64

Abstract : Experimental results on the turbulent mixing process between carbon dioxide and hydrogen central jets exhausting into a moving concentric stream of air are presented. The diffusion of mass and momentum only are considered, since both streams are at approximately equal temperature. The flow velocities are in the low to high subsonic range. Principal points of investigation are the condition of equal velocity between jets and the condition of equal mass flow per unit area between jets. Radial and axial distributions of concentration and velocity are presented. On the basis of the measurements it is concluded that no tendency towards segregation of the stream exists when either the velocities or the mass flows of the streams are equal. Furthermore, it is demonstrated that the product of local density and eddy kinematic viscosity coefficient can be assumed to be solely dependent upon the axial coordinate. In agreement with previous results it is found that mass diffuses more readily than momentum. Finally, a formulation of the eddy viscosity and eddy diffusivity coefficients that adequately describe the results obtained is derived. (Author)

Descriptors :   (*JET MIXING FLOW, VELOCITY), TRANSPORT PROPERTIES, CARBON DIOXIDE, HYDROGEN, DENSITY, DIFFUSION, VISCOSITY, TURBULENCE, WAKE, ANNULAR NOZZLES, PRESSURE, MOMENTUM, GAS FLOW

Distribution Statement : APPROVED FOR PUBLIC RELEASE