Control of Asymmetric Jet

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 2:1 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.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 1992
Accession Number
ADA255967

Entities

People

  • Chih-ming Ho

Organizations

  • University of Southern California

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Cameras
  • Chemical Reactions
  • Combustion
  • Computational Fluid Dynamics
  • Energy Transfer
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Froude Number
  • Heat Transfer
  • Hydrodynamics
  • Physics Laboratories
  • Three Dimensional
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flight