Evaluation of Probe Sampling Versus Optical in situ Measurements of Nitric Oxide Concentrations in a Jet Engine Combustor Exhaust

Abstract

Measurements of nitric oxide (NO) concentrations were made at the exhaust of a jet engine combustor by conventional gas-sampling probe and chemiluminescent analyzer methods, by optical resonance absorption through absorption cells located within the gas sample transfer line, and by optical resonance absorption directly through the combustor exhaust. The combustor was exhausted to atmospheric pressure and was operated at an inlet temperature near 600F, a total pressure of about 3 to 4 atm, and at fuel-to-air ratios (f/a) from 0.01 to 0.05. A tubular inlet, liquid-cooled, stainless steel sampling probe was inserted into the gas stream at the combustor exit. The optical technique used was the resonance absorption method for the (0,0) gamma-band of NO at wavelengths ranging from 2,200 to 2,270 A. The results showed that within the sampling line both the chemiluminescent gas analyzer and the optical absorption method gave NO concentrations that agreed within about 20 percent.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1977
Accession Number
ADA034726

Entities

People

  • J. D. Few
  • R. J. Bryson
  • W. K. Mcgregor

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption Coefficients
  • Air Force
  • Air Supplies
  • Arm Bones
  • Collision Broadening
  • Combustion
  • Computer Programs
  • Engineering
  • Exhaust Gases
  • Jet Engines
  • Measurement
  • Quantum Numbers
  • Resonance Absorption
  • Spectra
  • Spectral Lines
  • Spin Quantum Numbers
  • Turbines

Readers

  • Internal Combustion Engine (ICE) Technology.
  • Spectroscopy.