Active control of combustion for optimal performance
- Univ. of Oklahoma, Norman, OK (United States). Gas Turbine Systems Lab.
Combustion-zone stoichiometry and fuel-air premixing were actively controlled to optimize the combustor performance over a range of operating conditions. The objective was to maximize the combustion temperature, while maintaining NO{sub x} within a specified limit. The combustion system consisted of a premixer located coaxially near the inlet of a water-cooled shroud. The equivalence ratio was controlled by a variable-speed suction fan located downstream. The split between the premixing air and diffusion air was governed by the distance between the premixer and shroud. The combustor performance was characterized by a cost function evaluated from time-averaged measurements of NO{sub x} and oxygen concentrations in products. The cost function was minimized by downhill simplex algorithm employing closed-loop feedback. Experiments were conducted at different fuel flow rates to demonstrate that the controller optimized the performance without prior knowledge of the combustor behavior.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 678044
- Report Number(s):
- CONF-980615-; ISSN 0742-4795; TRN: IM9939%%100
- Journal Information:
- Journal of Engineering for Gas Turbines and Power, Vol. 121, Issue 3; Conference: American Society of Mechanical Engineers (ASME) turbo expo `98 - land, sea, air, Stockholm (Sweden), 2-5 Jun 1998; Other Information: PBD: Jul 1999
- Country of Publication:
- United States
- Language:
- English
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