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Water Injection on Commercial Aircraft to Reduce Airport Nitrogen OxidesThe potential nitrogen oxide (NO(x) reductions, cost savings, and performance enhancements identified in these initial studies of waterinjection technology strongly suggest that it be further pursued. The potential for engine maintenance cost savings from this system should make it very attractive to airline operators and assure its implementation. Further system tradeoff studies and engine tests are needed to answer the optimal system design question. Namely, would a low-risk combustor injection system with 70- to 90-percent NO(x) reduction be preferable, or would a low-pressure compressor (LPC) misting system with only 50-percent NO(x) reduction but larger turbine inlet temperature reductions be preferable? The low-pressure compressor injection design and operability issues identified in the report need to be addressed because they might prevent implementation of the LPC type of water-misting system. If water-injection technology challenges are overcome, any of the systems studied would offer dramatic engine NO(x) reductions at the airport. Coupling this technology with future emissions-reduction technologies, such as fuel-cell auxiliary power units will allow the aviation sector to address the serious challenges of environmental stewardship, and NO(x) emissions will no longer be an issue at airports.
Document ID
Document Type
Conference Paper
Daggett, David L.
(Boeing Commercial Airplane Co. Seattle, WA, United States)
Hendricks, Robert C.
(NASA Glenn Research Center Cleveland, OH, United States)
Fucke, Lars
(Boeing Commercial Airplane Co. Seattle, WA, United States)
Eames, David J. H.
(Rolls Royce Corp. Indianapolis, IN, United States)
Date Acquired
August 24, 2013
Publication Date
March 1, 2010
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
AIAA Paper 2004-4198
Meeting Information
40th Joint Propulsion Conference and Exhibit(Fort Lauderdale, FL)
Funding Number(s)
WBS: WBS 22-5000-0013
Distribution Limits
Public Use Permitted.
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