Experimental Study of Deflagration-to-Detonation Enhancement Techniques in a H2/Air Pulsed-Detonation Engine

Abstract

Experiments are performed on a number of deflagration-to-detonation (DDT) enhancement techniques for use in a H2/Air pulsed-detonation engine (PDE). The mechanism, speed and location of DDT for three configurations are considered, including a Shehelkin spiral, an extended cavity/spiral and a co-annulus. High speed digital imaging is used to track flame propagation. and simultaneous time-correlated pressure traces are used to record progress of the shock structure. It is found that DDT is initiated primarily through local explosions that are highly dependent on the particular geometry. In addition to various geometries. The effect of equivalence ratio and spark timing are also investigated.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2002
Accession Number
ADA454346

Entities

People

  • F. R. Schauer
  • J. L. Hoke
  • J. R. Gord
  • M. S. Brown
  • T. R. Meyer

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Aeronautics
  • Air Force
  • Air Force Research Laboratories
  • Astronautics
  • Cameras
  • Combustion
  • Combustion Products
  • Deflagration
  • Detonations
  • Explosions
  • Flame Propagation
  • Hot Spots
  • Images
  • Inner Tubes
  • Pressure Transducers
  • Shock Waves
  • Test Facilities

Fields of Study

  • Physics

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Computer Vision.
  • Rocket Propulsion.