Experimental evaluation of premixing: prevaporizing fuel injection concepts for a gas turbine catalytic combustor

Technical Report · Sat Jan 01 04:00:00 EST 1977

DOI:https://doi.org/10.2172/7084698· OSTI ID:7084698

Tacina, R

Experiments were performed to evolve and evaluate a premixing-prevaporizing fuel system to be used with a catalytic combustor for possible application in an automotive gas turbine. Spatial fuel distribution and degree of vaporization were measured using Jet A fuel. Three types of air-blast injectors, an air-assist nozzle and a simplex pressure atomizer were tested. Air swirlers with vane angles up to 30/sup 0/ were used to improve the spatial fuel distribution. The work was done in a 12-cm (4.75-in.) diameter tubular rig. Test conditions were: a pressure of 0.3 and 0.5 MPa (3 and 5 atm), inlet air temperatures up to 800/sup 0/K (980/sup 0/F), velocity of 20 m/sec (66 ft/sec) and fuel-air ratios of 0.01 and 0.025. Uniform spatial fuel distributions that were within +-10% of the mean were obtained. Complete vaporization of the fuel was achieved with airblast configurations at inlet air temperatures of 550/sup 0/K (530/sup 0/F) and higher. The total pressure loss was less than 0.5% for configurations without air swirlers and less than 1% for configurations with a 30/sup 0/ vane angle air swirler.

• Research Organization: National Aeronautics and Space Administration, Cleveland, Ohio (USA). Lewis Research Center
• DOE Contract Number: EX-76-A-31-1011
• OSTI ID: 7084698
• Report Number(s): CONS/1011-18; NASA-TM-73755; CONF-771120-1
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
AUTOMOBILES
CATALYSTS
COMBUSTORS
DISTRIBUTION
EVAPORATION
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUELS
GAS TURBINES
JET ENGINE FUELS
PERFORMANCE TESTING
PHASE TRANSFORMATIONS
SPATIAL DISTRIBUTION
TESTING
TURBINES
TURBOMACHINERY
VEHICLES