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- Using Plants to Sustain Military Ranges
- Sonar Key to Detecting Underwater UXO
- Monitoring and Mapping Coral Reefs
- EPA-Approved Protocol for Range Characterization
- Robotic Laser Coating Removal System
- Understanding cis-DCE and VC Biodegradation
- Eliminating Cr from Medium Caliber Gun Barrels
- Predicting Responses to Landscape Changes
- Applying Statistics and Modeling to UXO Discrimination
- Composites with Low HAP Compounds
- Perchlorate-Free Flares Undergo Qualification Testing
- Recovering Energy from Landfill Gas
- Modeling Underwater UXO Mobility in Reef Environments
- Understanding the Behavioral Ecology of Cetaceans
- Forecasting the Effects of Stressors on At-Risk Species
- Advanced Signal Processing for UXO Discrimination
- Reducing Emissions for Jet Engines of the Future
- Assessing Vapor Intrusion at Chlorinated Solvent Sites
- Passive Sampling of Contaminated Sediments
- Leveraging Advanced Sensor Data to Clean Up UXO
- Source Zone Architecture Key to DNAPL Remediation
- Biopolymers Maintain Training Berms, Prevent Contamination
- Rare-Earth Corrosion Protection Mechanisms
- Cold Spray Technology for Aircraft Component Repair
- Ecological Research Supports Training at Camp Lejeune
- Loss of Permafrost – Impact on DoD Lands in Alaska
- Converting Solar Energy to Electricity and Heat
- ASETSDefense Workshop on Sustainable Surface Engineering
- Forward Operating Bases: Water and Waste Management
- Evaluating Matrix Diffusion Effects on Groundwater
- ES&T Features In Situ Sediment Remediation
- Erosion Resistant Coating Improves Engine Efficiency
- Optimizing Boiler Efficiency Through Combustion Control
- Climate Change Adaptation: Enhanced Decision Making
- Adapting Energy-Efficient Heat Pumps for Cold Climates
- Workshop on Sustainable Surface Engineering Advances
- Ecological Forestry & DoD’s Carbon Footprint
- Munitions Classification in the Hands of Production Firms
- Intelligent and Energy-Efficient LED Street Lighting
- ESTCP Partners with EPA on Watershed Management
- White House Energy Security Blueprint References ESTCP
- Success Classifying Munitions in Wooded Areas
- Evaluating Technology Performance at DNAPL Sites
- ‘Flyer’ Improves OB/OD Air Emissions Measurement
- Identifying Research Needs for Underwater Munitions
- Success Classifying Small Munitions at Camp Butner
- Managing Military Lands in the Southwest
- Partnering to Advance Munitions Classification
- ‘Flyer’ Improves OB/OD Air Emissions Measurement - Preview
- Sonar Identifies Underwater Munitions in Gulf Study
- Protective Coating Improves Jet Engine Fuel Efficiency
- Assessing Pacific Island Watershed Health
- New Insights Into Tracking Contaminants in Bedrock
- ClimaStat Technology Improves HVAC Efficiency
- Innovative Plating Process for Beryllium Alternatives
Reducing Emissions for Jet Engines of the Future
Improved understanding of soot formation will enable manufacturers to design and build high-performance engines that emit less pollution.
Dr. Mel Roquemore, Air Force Research Laboratory
Combustion Science to Reduce Particulate Matter Emissions for Military Platforms
Soot formation in gas turbine engines is a major concern in the design of modern aircraft propulsion systems. Gas turbine engines are a source of particulate matter emissions, a substantial fraction of which consist of soot particles with diameters of less than 2.5 microns, or PM2.5, that are subject to regulation under the National Ambient Air Quality Standards. The long-term solution is to build DoD’s engines of the future in a way that reduces their emissions—a daunting challenge given the complexity involved.
Minimization of emissions from gas turbine engines during initial design is currently not possible. Accurate modeling of soot formation is difficult due to the complex underlying chemical and physical processes. These processes involve a sequence of gas phase reactions, followed by particle inception, particle-particle interactions, condensation, particle growth, and oxidation. The reactions involve literally hundreds of chemical species and take place in extreme environments of pressure, temperature, and turbulence. This environment is challenging for both modeling and measurements.
Dr. Mel Roquemore led a collaborative team from academia, industry, and government laboratories in advancing the fundamental science relevant to the formation of PM2.5. The team conducted experiments and simulations to understand the chemistry, fluid dynamics, and thermodynamics of particle formation in high-performance engines. Validated detailed soot and full chemical models can be applied, in conjunction with full 3-D combustor design codes, to estimate soot and other emissions for gas turbine combustors.
This research represents a critical achievement in the quest to enable jet engine manufacturers to design and build engines that emit less pollution.
For this work, Dr. Roquemore received a Project-of-the-Year award at the annual Partners in Environmental Technology Technical Symposium & Workshop held November 29 –December 1, 2011, in Washington, D.C.
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