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RESEARCH PAPERS

Recirculation Effects in Gas Turbine Combustors

[+] Author and Article Information
R. Kollrack, L. D. Aceto

Pratt & Whitney Aircraft Division, United Aircraft Corp., East Hartford, Conn.

J. Eng. Power 97(4), 527-530 (Oct 01, 1975) (4 pages) doi:10.1115/1.3446054 History: Received August 02, 1974; Online July 14, 2010

Abstract

An evaluation of the effects caused by recirculation of hot final combustion products into unburned or partially burned fuel/air mixtures indicates that the thermal effect predominates the combustion activity. Dilution and the introduction of active radicals produce lesser results. Internal recirculation, such as produced by swirl or bluff body stabilization, differs from external recirculation by the temperature levels of the recirculant and its composition. The net effect of recirculation is to simulate a longer residence time and/or an effective higher inlet temperature. As a general result, the end products are closer to equilibrium, specifically the CO levels are lower and the NO levels higher.

Copyright © 1975 by ASME
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