Accession Number : AD0714655

Title :   The Initiation, Development, and Decay of the Secondary Flow in an Incompressible Turbulent Bounded Jet.

Descriptive Note : Progress rept. no. 2,

Corporate Author : MICHIGAN STATE UNIV EAST LANSING DIV OF ENGINEERING RESEARCH

Personal Author(s) : Holdeman,J. D. ; Foss,J. F.

Report Date : 30 JUN 1970

Pagination or Media Count : 390

Abstract : A comprehensive explanation of the initiation, development, and decay of the secondary flow in an incompressible turbulent bounded jet is presented and supported by experimental data. The planar vortex ring near the nozzle exit is stretched and reoriented resulting in the development of a large scale secondary flow. As the streamwise vorticity is diffused, the secondary motion decays. This explanation is supported by the vorticity and velocity data of this investigation. A measure of the vorticity near the nozzle exit was obtained with a four-blade vorticity meter. Isotachs and mass, momentum, and energy flux ratios were calculated from mean velocity measurements made at various elevations in a direction perpendicular to the streamwise direction of the flow. (Author)

Descriptors :   (*JETS, *SECONDARY FLOW), (*INCOMPRESSIBLE FLOW, JETS), TURBULENCE, ASPECT RATIO, ATTENUATION, VORTICES, STATISTICAL DATA

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE