Hydroxyl Tagging Velocimetry in a Mach 2 Flow With a Wall Cavity (Postprint)

Abstract

Hydroxyl tagging velocimetry (HTV) measurements of velocity were made in a Mach 2 flow with a wall cavity. In the HTV method, ArF excimer laser (193 nm) beams pass through a humid gas and dissociate H2O into H + OH to form a tagging grid of OH molecules. In this study, a 7x7 grid of hydroxyl (OH) molecules is tracked by planar laser-induced fluorescence. The grid motion over a fixed time delay yields about 50 velocity vectors of the two-dimensional flow. Instantaneous, single-shot measurements of two-dimensional flow patterns were made in the non-reacting Mach 2 flow with a wall cavity under low and high pressure conditions. The single-shot profiles were analyzed to yield mean and rms velocity profiles in the Mach 2 non-reacting flow.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2005
Accession Number
ADA464095

Entities

People

  • C. D. Carter
  • C. Lum
  • J. A. Wehrmeyer
  • K. Y. Hsu
  • M. D. Lahr
  • M. M. Koochesfahani
  • R. W. Pitz
  • S. Hu
  • Z. W. Douglas

Organizations

  • Vanderbilt University

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Doppler Effect
  • Dye Lasers
  • Engineering
  • Excimer Lasers
  • Flow
  • Fluid Dynamics
  • Fluorescence
  • High Pressure
  • Laser Beams
  • Laser Induced Fluorescence
  • Lasers
  • Measurement
  • Mechanical Engineering
  • Turbulent Mixing
  • Two Dimensional
  • Two Dimensional Flow

Fields of Study

  • Physics

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Fluid Dynamics.
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Directed Energy