Comparisons of Turbine Engine Combustor Exhaust Emissions Measurements Using Three Gas-Sampling Probe Designs
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1978
- Accession Number
- ADA061733
Entities
People
- J. D. Few
- R. J. Bryson
Organizations
- Arnold Engineering Development Complex