In anticipation of Government regulations on the emission of nitrogen oxides from industrial gas turbine engines, United Technologies Corporation has tested a burner for the FT4 engine which meets the proposed regulation of 75 PPMV NOx at 15 percent oxygen and 25 percent thermal efficiency. The design is based on predicted values of NOx as a function of flame temperature and verified the predictions. A two-phase combustion system is employed to provide the fuel-air ratio range required for engine operation without exceeding high flame temperature or lean flammability limits. A cast, finned construction is employed for durability and low cost. Current market economic considerations have required the program to be suspended.
Industrial turbines fired on medium heating value (MHV) gas (nominally 300 Btu/scf) synthesized from coal offer an attractive alternative means of producing electrical power in the future. Peak flame temperatures resulting from combustion of this MHV gas in conventional diffusion flame combustors may be comparable to those of natural gas, yielding undesirably high concentrations of NOx. This paper describes an EPRI-sponsored program conducted to demonstrate a MHV gas turbine combustor capable of meeting EPA NOx requirements without water injection. Program objectives were to design, fabricate, and test three MHV combustor configurations and to demonstrate NOx emissions concentrations of 15 ppmv (dry basis) or less at a burner inlet pressure of 1.27 atm: Design of the combustors was based on a lean-premix fuel metering concept. Tests were conducted in a single-can combustor rig at simulated engine conditions ranging from 40 to 125 percent of engine baseload (74 MW).
The F100 turbofan engine is a twin-spool, augmented engine [89,000–133,000 Newton (20–30,000 lb) thrust range] that powers the McDonnell-Douglas/Air Force F-15 air superiority fighter. The F100 was developed jointly with the Navy F401 engine. These engines have a common core (gas generator). The success of these advanced high thrust/weight engines is, in part, the result of the development of a short, annular, high-heat-release rate primary combustor, which has a low temperature pattern factor, high combustion efficiency, and low pressure loss. The F100’s combustor uses conventional sheet metal louver cooling to minimize cost and weight, airblast fuel nozzles and combustor swirlers to atomize the fuel, and a dump diffuser to reduce the compressor air exit Mach number.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.