Combustion product distributions in the primary zone of a gas turbine combustor

Journal Article · Sat Jan 31 23:00:00 EST 1976 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(76)90063-8· OSTI ID:6474728

Vranos, A; Taback, E D

To better understand the causes of low combustion efficiency at low power, United Technologies Corp. experimentally determined combustion-product distributions in the primary zone of a Pratt and Whitney Aircraft JT8D gas turbine combustor operating at simulated idle and approach conditions. At two azimuthal positions located 1.5, 2.7, and 5.7 in. downstream of the nozzle face and at the center of the exit transition duct, radial composition profiles were made for carbon dioxide, carbon monoxide, hydrogen, oxygen, nitrogen, and total hydrocarbons. The resulting data show CO concentration to be a function of the fuel/air ratio for all measurements made at the idle power condition. However, measurements taken within 0.75 in. of the wall exhibited greater CO concentrations than those existing in the burner core at the same fuel/air ratios. UTC attributes this increase to the quenching of CO oxidation by the cooling air used in gas turbine combustors. At the approach condition, profile shapes were similar to those at idle; but quenching near the wall was not evident, probably because of the higher gas temperature occurring at that condition.

• OSTI ID: 6474728
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 26; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COMBUSTION PRODUCTS
COMBUSTORS
CRYOGENIC FLUIDS
DISTRIBUTION
ELEMENTS
FLUIDS
FUEL-AIR RATIO
GAS TURBINES
HYDROCARBONS
HYDROGEN
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
SPATIAL DISTRIBUTION
TURBINES
TURBOMACHINERY