Schlieren Imaging of a Single-Ejector, Multi-Tube Pulsed Detonation Engine (Postprint)

Abstract

Single-ejector, multi-tube pulsed detonation engine configurations are examined utilizing high speed Schlieren and coherent structural velocimetry. The mechanisms of ejector augmentation are evident in secondary air entrainment and induced flow across the ejector lip. An axisymmetric ejector with both a linear array and a more compact box array of detonation tubes was examined. Good secondary entrainment and subsequent ejector flow was observed, supporting previous results indicating off-axis effects are relatively insignificant to ejector thrust augmentation. A linear ejector with linear detonation tubes revealed limited secondary flow engagement with the ejector lip, likely due to structural ribs.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2009
Accession Number
ADA512658

Entities

People

  • A. G. Naples
  • F. R. Schauer
  • J. L. Hoke
  • L. P. Goss

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Air Entrainment
  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Arrays
  • Detonations
  • Entrainment
  • Fires
  • Flow
  • Flow Fields
  • Ignition Lag
  • Linear Arrays
  • Military Research
  • Research Facilities
  • Secondary Flow
  • Thrust
  • Thrust Augmentation

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Fluid Mechanics and Fluid Dynamics.