Investigations into Shock-Induced Enhancement of Mixing and Combustion in Supersonic Burners

Abstract

Experiments were carried out in the GALCIT 17 in. shock tube to investigate the effectiveness of shock enhancement on the mixing rate of a cylinder of helium gas into the surrounding air. Laser induced fluorescence was employed to trace the time development of mixing using byacetal dye to mark the helium. The concentration of helium was reduced below 20% of its initial value over 0.6 of the helium volume within less than one ms by a weak (M=1.1) shock. The results corresponded well to results of computational analysis. Details of the combustion within the vortex were investigated in large vortices, created by a pulsing technique in the Unsteady Combustion Facility. The results of this program were sufficiently promising to encourage the design, construction and test of a scramjet injector using the technique.

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Document Details

Document Type
Technical Report
Publication Date
Nov 30, 1990
Accession Number
ADA231750

Entities

People

  • Frank E. Marble

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Pressure
  • Aircrafts
  • Boundary Layer
  • Chemical Reactions
  • Combustion
  • Engines
  • Fluid Dynamics
  • Fluid Mechanics
  • Laser Induced Fluorescence
  • Mach Number
  • Shock Tubes
  • Shock Waves
  • Supersonic Combustion
  • Supersonic Combustion Ramjet Engines
  • Tubes
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Combustion science or combustion engineering.
  • Systems Analysis and Design

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers
  • Hypersonics
  • Hypersonics - Hypersonic Flow