Accession Number:

ADA061733

Title:

Comparisons of Turbine Engine Combustor Exhaust Emissions Measurements Using Three Gas-Sampling Probe Designs

Descriptive Note:

Final rept. 1 Dec 1976-30 Aug 1977

Corporate Author:

ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN

Personal Author(s):

Report Date:

1978-11-01

Pagination or Media Count:

67.0

Abstract:

The effects of sampling probe design and probe operating procedures on measurements of concentrations of nitric oxide NO, oxides of nitrogen NOx , carbon monoxide CO, carbon dioxide CO2, total hydrocarbons CxHy, and gaseous hydrogen H2 in the exhaust of a turbine engine combustor were studied. Measurements of the concentrations were made using commerical gas analysis instruments and three types of gas-sampling probes. The probe types were a tubular inlet probe, a quick-quench probe, and a dilution probe. Diluent gas N2, A, He and diluent flowrate effects on measurements were studied for the dilution probe. Effects of sampling surface material and sample residence time in the probe were investigated for the tubular inlet probe, and the effects of pressure ratio across the quick-quench probe were determined. At fuel-to-air ratios greater than 0.01, the levels of NO, NOx and CO2 were somewhat smaller for the quick-quench and dilution probes than for the tubular inlet probe. The measured concentrations of carbon monoxide and unburned hydrocarbons, however, were greater for the quick-quench and dilution probes than for the tubular inlet probe.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Combustion and Ignition
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE