Accession Number:

ADA255967

Title:

Control of Asymmetric Jet

Descriptive Note:

Final technical rept. 1 May 1990-30 Apr 1992

Corporate Author:

UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF AEROSPACE ENGINEERING

Personal Author(s):

Report Date:

1992-06-30

Pagination or Media Count:

127.0

Abstract:

A passive method of enhancing the rate of entrainment by as much as 500 in subsonic open nozzle flows has been obtained by modifying axisymmetric nozzle geometry to a 21 aspect-ratio elliptic nozzle. Small aspect-ratio elliptical nozzles have been demonstrated to more efficiently control mixing processes and to exhibit increased rates of spreading, entrainment and fine- scale mixing than axisymmetric nozzles at subsonic and supersonic conditions in a confined dump combustor and in high-temperature ramjets. Vortex self-induction is the principle mechanism controlling mixing processes in asymmetric jet nozzles.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE