The Sequential Spark Technique: A Tool for Wake Velocity Studies in Ballistic Ranges

Abstract

For more than six years, the Defence Research Establishment Valcartier (DREV) has been carrying out a program of investigation of turbulent wakes in its ballistic range facilities. One of the experimental techniques used in the program has been the sequential spark technique which makes use of electrical discharges (sparks) in sequence to measure velocity profiles in the wake of projecticles in free flight. This experimental technique is based on the formation of an ionized luminous path in the wake by a first spark and on the periodic reillumination of the displaced ionized path by successive sparks. Open-shutter photography yields a profile of the displacement of the path which can be used to calculate the velocity. The report presents a comprehensive review of the sequential spark technique.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1971
Accession Number
AD0742740

Entities

People

  • C. Lahaye

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Boundary Layer
  • Cameras
  • Detectors
  • Electric Fields
  • Gas Flow
  • Generators
  • Geometry
  • High Voltage
  • Measurement
  • Photographs
  • Pulse Generators
  • Pulse Transformers
  • Repetition Rate
  • Silicon Controlled Rectifiers
  • Standards
  • Systems Engineering

Fields of Study

  • Physics

Readers

  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Fluid Dynamics.
  • Plasma Physics.