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Pollutant formation in fuel lean recirculating flowsAn opposed reacting jet combustor (ORJ) was tested at a pressure of 1 atmosphere. A premixed propane/air stream was stabilized by a counterflowing jet of the same reactants. The resulting intensely mixed zone of partially reacted combustion products produced stable combustion at equivalence ratios as low as 0.45. Measurements are presented for main stream velocities of 7.74 and 13.6 m/sec with an opposed jet velocity of 96 m/sec, inlet air temperatures from 300 to 600 K, and equivalence ratios from 0.45 to 0.625. Fuel lean premixed combustion was an effective method of achieving low NOx emissions and high combustion efficiencies simultaneously. Under conditions promoting lower flame temperature, NO2 constituted up to 100 percent of the total NOx. At higher temperatures this percentage decreased to a minimum of 50 percent.
Document ID
19770010126
Acquisition Source
Legacy CDMS
Document Type
Thesis/Dissertation
Authors
Schefer, R. W. (California Univ. Berkeley, CA, United States)
Sawyer, R. F. (California Univ. Berkeley, CA, United States)
Date Acquired
September 3, 2013
Publication Date
December 1, 1976
Publication Information
Publisher: NASA
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
UCB-ME-76-5
NASA-CR-2785
Accession Number
77N17069
Funding Number(s)
CONTRACT_GRANT: NSG-3028
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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