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Wide range operation of advanced low NOx combustors for supersonic high-altitude aircraft gas turbinesAn initial rig program tested the Jet Induced Circulation (JIC) and Vortex Air Blast (VAB) systems in small can combustor configurations for NOx emissions at a simulated high altitude, supersonic cruise condition. The VAB combustor demonstrated the capability of meeting the NOx goal of 1.0 g NO2/kg fuel at the cruise condition. In addition, the program served to demonstrate the limited low-emissions range available from the lean, premixed combustor. A follow-on effort was concerned with the problem of operating these lean, premixed combustors with acceptable emissions at simulated engine idle conditions. Various techniques have been demonstrated that allow satisfactory operation on both the JIC and VAB combustors at idle with CO emissions below 20 g/kg fuel. The VAB combustor was limited by flashback/autoignition phenomena at the cruise conditions to a pressure of 8 atmospheres. The JIC combustor was operated up to the full design cruise pressure of 14 atmospheres without encountering an autoignition limitation although the NOx levels, in the 2-3 g NO2/kg fuel range, exceeded the program goal.
Document ID
19780006104
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Roberts, P. B.
(Solar Turbines Inc. San Diego, CA, United States)
Fiorito, R. J.
(Solar Turbines Inc. San Diego, CA, United States)
Date Acquired
September 3, 2013
Publication Date
October 1, 1977
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NASA-CR-135297
RDR-1817-22
Accession Number
78N14047
Funding Number(s)
CONTRACT_GRANT: NAS3-19770
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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