- Author
-
Marshall, A. W.
- Title
- Development of Lean Direct Injection Combustion Technology for Low Emissions Aircraft Engines. BFRL Fire Research Seminar. VHS Video.
- Coporate
- Maryland Univ., College Park
- Report
-
Video,
December 12, 2001,
- Keywords
-
aircraft engines
|
combustion
|
emissions
- Abstract
- [DUE TO TECHNICAL DIFFICULTIES - NO SOUND] In response to increasingly stringent environmental regulations, Rolls-Royce Corp. is currently developing next generation combustion technology to reduce emissions from future gas turbine engines. A Lean Direct Injection (LDI) strategy for emissions abatement has been selected for this task. In the LDI strategy, fuel and air are rapidly mixed to create a lean combustion zone resulting in reduced flame temperatures and associated lower NOx formation rates. This simple, cost-effective approach is expected to have sufficient emissions reduction potential to comply with even the most aggressive regulations. This technology has been developed from concept to full-scale demonstration under the NASA Advanced Subsonic Transport (AST) program. The combustion system task order in this program was to reduce NOx emissions to 50% of the current International Civil Aviation Organization (ICAO) regulation. Development of this low emissions technology involves a wide range of thermal-fluid disciplines from fuel atomization for rapid mixing to heat transfer for combustor wall cooling. Thermal-fluid analysis has been supported by industry leading in-house design tools and CFD codes. Conventional and advanced diagnostics also have played an integral role in the development of this technology. The LDI 50% NOx reduction goal has been achieved in single component and sector configurations with inlet conditions ranging from (50 psia, 330 deg F) to (290 psia, 850 deg F). Full annular combustor hardware has also been fabricated and tested for a full-scale combustion system demonstration. Initial test results show better than expected emissions reduction and stability performance for the LDI low emissions technology.