Experiments were performed in laboratory-and full-scale combustors to test the feasibility of meeting proposed EPA emission standards. It was found that by uniformly mixing gaseous fuel and primary zone air prior to combustion and burning fuel leanly (equivalence ratio <1.0), it was possible to meet the proposed emission standards in an industrial gas turbine. The characteristic narrow range of flame stability obtained with lean premix combustion necessitated the use of fuel staging or variable geometry to handle the operational range of the engine. Fuel staging was selected for its relative simplicity. Consequently, EPA proposed emission standards were met only over a narrow range covering the engine operation at and near the design point. Experiments on small scale models of various sizes operated with gaseous and liquid fuels showed that, contrary to expectation, NOx production from a lean premix combustion system is independent of the system pressure in the pressure range investigated (1 atm to 16 atm). The desirability of high combustor inlet temperature and pressure for premixing was indicated. Despite the complexities of premixing fuel and air, such a combustion system, in addition to meeting the proposed emission standards, offers advantages such as easing of combustor wall cooling problems, improved combustor exit temperature distribution, and freedom from exhaust and primary zone smoke.
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July 1980
This article was originally published in
Journal of Engineering for Power
Research Papers
Ongoing Development of a Low Emission Industrial Gas Turbine Combustion Chamber
V. M. Sood,
V. M. Sood
Combustion Systems, P.O. Box 80966, Solar Turbines International, San Diego, CA 92138
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J. R. Shekleton
J. R. Shekleton
Combustion Systems, P.O. Box 80966, Solar Turbines International, San Diego, CA 92138
Search for other works by this author on:
V. M. Sood
Combustion Systems, P.O. Box 80966, Solar Turbines International, San Diego, CA 92138
J. R. Shekleton
Combustion Systems, P.O. Box 80966, Solar Turbines International, San Diego, CA 92138
J. Eng. Power. Jul 1980, 102(3): 549-554 (6 pages)
Published Online: July 1, 1980
Article history
Received:
January 17, 1979
Online:
September 28, 2009
Citation
Sood, V. M., and Shekleton, J. R. (July 1, 1980). "Ongoing Development of a Low Emission Industrial Gas Turbine Combustion Chamber." ASME. J. Eng. Power. July 1980; 102(3): 549–554. https://doi.org/10.1115/1.3230299
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