Rotational and Vibrational Temperature Measurements in the LDR High Enthalpy Shock Tunnel HEG Using LIF and Flash Lamp Absorption

Abstract

Use of LIF in two line thermometry TLT and of flash lamp absorption to examine high enthalpy flows is presented. The aim is to measure rotational and vibrational temperatures of nitric oxide NO in high temperature air in the Goettingen High Enthalpy Shock Tunnel HEG. Theory of NO (energy levels, spectroscopy, level populations), LIF and TLT are discussed. Results are given from a test cell to validate TLT with NO LIF as a quantitative technique. HEG results for rotational and vibrational temperatures in the free stream and around models are presented. Finally, flash lamp absorption results yielding these temperatures are given.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2000
Accession Number
ADP010747

Entities

People

  • W. H. Beck

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Detection
  • Emission Spectra
  • Emission Spectroscopy
  • Energy Levels
  • Energy Transfer
  • Flash Lamps
  • Free Stream
  • Ground State
  • Laser Beams
  • Measurement
  • Molecules
  • Quantum Numbers
  • Quantum Yields
  • Shock Tunnels
  • Spectra
  • Spectroscopy

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Spectroscopy.
  • Thermal Physics or Thermal Science.