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The Effect of Air Preheat at Atmospheric Pressure on the Formation of NO(x) in the Quick-Mix Sections of an Axially Staged CombustorThe Rich-burn/Quick-mix/Lean-burn (RQL) combustor concept has been proposed to minimize the formation of nitrogen oxides (NO(x)) in gas turbine systems. The success of this combustor strategy is dependent upon the efficiency of the mixing section bridging the fuel-rich and fuel-lean stages. Note that although these results were obtained from an experiment designed to study an RQL mixer, the link between mixing and NOx signatures is considerably broader than this application, in that the need to understand this link exists in most advanced combustors. The experiment reported herein was designed to study the effects of inlet air temperature on NO(x) formation in a mixing section. The results indicate that NO(x) emission is increased for all preheated cases compared to non-preheated cases. When comparing the various mixing modules, the affect of jet penetration is important, as this determines where NO(x) concentrations peak, and affects overall NO(x) production. Although jet air comprises 70 percent of the total airflow, the impact that jet air preheat has on overall NO(x) emissions is small compared to preheating both main and jet air flow.
Document ID
19990109093
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Vardakas, M. A.
(California Univ. Irvine, CA United States)
Leong, M. Y.
(California Univ. Irvine, CA United States)
Brouwer, J.
(California Univ. Irvine, CA United States)
Samuelsen, G. S.
(California Univ. Irvine, CA United States)
Holdeman, J. D.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1999
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NASA/TM-1999-209431
E-11872
NAS 1.15:209431
Funding Number(s)
CONTRACT_GRANT: NCC3-412
PROJECT: RTOP 537-02-20
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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