High-temperature turbine-technology program: Phase II. Technology test and support studies. Design and development of a high-temperature gas-turbine combustor for operation on low-Btu gas
The design and test evaluation of a high temperature combustor component for operation in an industrial gas turbine are described. Specific design considerations include: operation at 2600 to 3000/sup 0/F combustor exit gas temperature; operation on coal-derived low Btu gas fuel; and suitability for integration into a high efficiency, combined cycle electric power generating plant. An annular, air film cooled combustor concept was selected for this program. Detailed analytical studies were conducted, followed by design, fabrication and test evaluation. A gaseous fuel synthesizing facility with a total gas flow capacity of 22,000 ppH for a continuous six-hour period was constructed to supply the test combustor. The goal of 99.8% combustion efficiency at the design point of 0.5 fuel-air ratio was not achieved. However, the design temperature rise of 2220/sup 0/F was demonstrated, and stable combustion was observed over a wide range of fuel-air ratios. Analysis of the test record and emissions measurement indicates marginal fuel and air homogeneity within the primary burning zone at fuel-air ratios above 0.3. It was concluded that all of the combustor design goals can be met with improved fuel-air mixing. The initial combustor design was based upon attainment of sufficient stoichiometric homogeneity by large scale mixing air holes. The combustion test results indicate that this approach did not produce a satisfactory airflow pattern within the combustor primary zone. Therefore, the number of air inlet ports was increased and their locations moved forward to attain a degree of fuel-air premix prior to combustion. No significant improvement in combustion efficiency with the revised axial airflow distribution was found. Results indicated that the simple radial injection design must be supplemented by axial air mixing devices.
- Research Organization:
- Curtiss-Wright Corp., Wood-Ridge, NJ (USA)
- DOE Contract Number:
- AC01-76ET10348
- OSTI ID:
- 5346220
- Report Number(s):
- CW-WR-76-020.78A; FE-2291-78A; ON: DE82014365
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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42 ENGINEERING
COMBINED-CYCLE POWER PLANTS
GAS TURBINES
COMBUSTORS
DESIGN
PERFORMANCE
COMBUSTION KINETICS
EXPERIMENTAL DATA
FUEL-AIR RATIO
LOW BTU GAS
STABILITY
CHEMICAL REACTION KINETICS
DATA
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
INFORMATION
KINETICS
MACHINERY
NUMERICAL DATA
POWER PLANTS
REACTION KINETICS
THERMAL POWER PLANTS
TURBINES
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200104* - Fossil-Fueled Power Plants- Components
421000 - Engineering- Combustion Systems