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Showing 81 - 100 of 596 results
  • Project 059A Jet Noise Modeling to Support Low Noise Supersonic Aircraft Technology Development
    Project 059(A) Jet Noise Modeling to Support Low Noise Supersonic Aircraft Technology Development
    Mavris, Dimitri N. ;
    Tai, Jimmy C.
    2024-02-01 | PDF
    This project sought to understand the degree to which a 2D supersonic inlet with variable geometry could mitigate thrust losses associated with the addition of jet noise reduction technologies, without overcoming the noise benefits from those technologies, during landing and takeoff (LTO) conditions. The work developed a supersonic inlet modeling c ...
  • Project 050 OverWing Engine Placement Evaluation
    Project 050 Over-Wing Engine Placement Evaluation
    Mavris, Dimitri N. ;
    Lee, Chung
    2024-02-01 | PDF
    The over-wing nacelle (OWN) aircraft concept has promising environmental benefits due to the engine noise shielding by the wings. However, if not optimized, this engine placement may cause penalties in fuel burn due to adverse aerodynamic interactions between the wing and propulsor. In this work, the team aims to develop a multi-disciplinary optimi ...
  • Modeling the Air Quality Impact of Aircraft Emissions Is Area or Volume the Appropriate Source Characterization in AERMOD
    Modeling the Air Quality Impact of Aircraft Emissions: Is Area or Volume the Appropriate Source Characterization in AERMOD?
    Pandey, Gavendra ;
    Venkatram, Akula
    2024-02-01 | PDF
    Modeling dispersion of aircraft emissions is challenging because aircraft are mobile sources with varying emissions rates at different elevations depending on the operating mode. Aircraft emissions during landing and take-off cycle (LTO) influence air quality in and around the airport, and depending on the number of aircraft operations and location ...
  • Opioid Epidemic and Aviation
    Opioid Epidemic and Aviation
    United States. Department of Transportation. Federal Aviation Administration. Civil Aerospace Medical Institute
    2024-01-01 | Aeromedical Safety Brochures | PDF
    Aeromedical Safety Brochures are prepared for general aviation pilots, commercial pilots and physicians. The brochures acquaint the aviation community with the physiological challenges of the aviation environment and relevant safety concerns.
  • A Scalable System to Measure Contrail Formation on a PerFlight Basis
    A Scalable System to Measure Contrail Formation on a Per-Flight Basis
    Geraedts, Scott ;
    Brand, Erica
    2024-01-01 | PDF
    Persistent contrails make up a large fraction of aviationʼs contribution to global warming. We describe a scalable, automated detection and matching (ADM) system to determine from satellite data whether a flight has made a persistent contrail. The ADM system compares flight segments to contrails detected by a computer vision algorithm running on im ...
  • Sustainable Aviation Fuel Production in Colombia Opportunities and Challenge
    Sustainable Aviation Fuel Production in Colombia: Opportunities and Challenge
    Martinez-Valencia, Lina ;
    Valderrama-Rios, Claudia
    2024-01-01 | PDF
    The sustainable aviation fuel (SAF) working group in Colombia was convened under the SAF Global Supply Chain Development project (Project A93) led by the Federal Aviation Administration’s (FAA) Center of Excellence for Alternative Jet Fuels and Environment, also termed the Aviation Sustainability Center of Excellence (ASCENT) and executed by Washin ...
  • Preliminary AEDT Noise Model Validation using RealWorld Data
    Preliminary AEDT Noise Model Validation using Real-World Data
    Willitt, Amber ;
    Bendarkar, Mayank V
    2024-01-01 | PDF
    A focus on sustainability in aviation is required to mitigate the environmental impact of its growth. Modeling the environmental effects helps the aerospace community obtain quantitative data linked to aircraft emissions and noise. The Aviation Environmental Design Tool (AEDT) offers the capability to model aviation operations using data sources of ...
  • Modern Training Practices Studying the Use of Virtual Reality for Training Procedures in Flightcrew Training
    Modern Training Practices: Studying the Use of Virtual Reality for Training Procedures in Flightcrew Training
    Nguyen, Blake ;
    Sonnenfeld, Nathan
    2023-12-01 | PDF
    Flightcrew training is a cornerstone of aviation safety, ensuring that pilots and other crewmembers possess the skills and knowledge required to navigate complex aircraft and respond effectively to non-normal situations. As technology continues to advance and new training demands continue to emerge in the aviation industry, the use of modern traini ...
  • Quantitation of Olefins in Sustainable Aviation Fuel Intermediates Using Principal Component Analysis Coupled with Vacuum Ultraviolet Spectroscopy
    Quantitation of Olefins in Sustainable Aviation Fuel Intermediates Using Principal Component Analysis Coupled with Vacuum Ultraviolet Spectroscopy
    Kosir, Shane ;
    Feldhausen, John
    2023-12-01 | PDF
    Olefins, a common intermediate from biomass conversion processes, are undesirable in jet fuel because of their poor thermal stability. This paper presents an approach for olefin quantitation using 2D gas chromatography coupled with vacuum ultraviolet spectroscopy. Principal component analysis was used to reduce the dimensionality of the spectroscop ...
  • Project 010 Aircraft Technology Modeling and Assessment
    Project 010 Aircraft Technology Modeling and Assessment
    Mavris, Dimitri N. ;
    Crossley, William
    2023-12-01 | PDF
    For duration of Project 10’s period of performance, the research activities have remained consistent on technology modeling, system level assessment and fleet level modeling. These activities were conducted for subsonic fleet from 2014 to 2017 and focused on supersonic fleet from 2017 to 2023. The final report focuses on the latter in which Georgia ...
  • Flightcrew Response to Aircraft System Failures Malfunctions and Systems Not Functioning as Expected
    Flightcrew Response to Aircraft System Failures, Malfunctions, and Systems Not Functioning as Expected
    Chandra, Divya C ;
    Sparko, Andrea L.
    2023-10-01 | PDF
    The primary goal of this research was to analyze operational data to study flightcrew response to system failures, malfunctions, and systems not functioning as expected. Data from normal flight operations show that pilots are exposed to such situations regularly. We reviewed 20 records from the Aviation Safety Reporting System (ASRS) public databas ...
  • FAA Center of Excellence for Alternative Jet Fuels Environment Annual Technical Report 2023 For the Period October 1 2022 September 30 2023
    FAA Center of Excellence for Alternative Jet Fuels & Environment: Annual Technical Report 2023: For the Period October 1, 2022 – September 30, 2023
    United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment  ...
    2023-10-01 | PDF
    This report covers the period October 1, 2022, through September 30, 2023. The Center was established by the authority of FAA solicitation 13-C-AJFE-Solicitation. During that time the ASCENT team launched a new website, which can be viewed at ascent.aero. The next meeting(s) will be held during the months of April and May 2024.
  • Elucidating the Polycyclic Aromatic Hydrocarbons Involved in Soot Inception
    Elucidating the Polycyclic Aromatic Hydrocarbons Involved in Soot Inception
    Shao, Can ;
    Wang, Qi
    2023-10-01 | PDF
    Polycyclic aromatic hydrocarbons are the main precursors to soot particles in combustion systems. A lack of direct experimental evidence has led to controversial theoretical explanations for the transition from gas-phase species to organic soot clusters. This work focuses on sampling infant soot particles from well-defined flames followed by analys ...
  • Characterizing Temporal Trends in Populations Exposed to Aircraft Noise Around US Airports 19952015
    Characterizing Temporal Trends in Populations Exposed to Aircraft Noise Around U.S. Airports: 1995–2015
    Nguyen, Daniel D ;
    Levy, Jonathan I
    2023-09-21 | PDF
    National-scale analyses showed non-monotonic trends in mean exposed areas that peaked in 2000, followed by a 37% decrease from 2005 to 2010 and a subsequent increase in 2015. We identified four distinct trajectory groups of airports sharing latent characteristics related to size and activity patterns. Those populations identifying as minority (e.g. ...
    Supporting Files
  • The Role of Topography for Secondary Sonic Boom Reflection
    The Role of Topography for Secondary Sonic Boom Reflection
    Sparrow, Victor W. ;
    Riegel, Kimberly A
    2023-09-15 | PDF
    This paper describes an initial investigation on the reflection of secondary sonic booms, based on the surface topography. It is hypothesized that the type of secondary sonic booms resulting from a primary boom surface reflection could be substantially affected by the topography. A primary boom impacting a flat ocean will provide for a coherent ref ...
  • Accounting for Plume Rise of Aircraft Emissions in AERMOD
    Accounting for Plume Rise of Aircraft Emissions in AERMOD
    Pandey, Gavendra ;
    Venkatram, Akula
    2023-09-01 | PDF
    The U.S. Federal Aviation Administration (FAA) uses the Aviation Environmental Design Tool (AEDT) to assess the impact of airport emissions on air quality in and around an airport. AEDT incorporates EPA's (Environmental Protection Agency) regulatory model, AERMOD. The area/volume source algorithm in AERMOD is currently used to treat most airport so ...
  • Project 009 Geospatially Driven NoiseEstimation Module
    Project 009 Geospatially Driven Noise-Estimation Module
    Mavris, Dimitri N. ;
    Pfaender, Holger
    2023-09-01 | PDF
    The goal of this project was to research potential open-source alternative geospatial frameworks for upgrading AEDT, and to test and experiment with different novel computational approaches in order to drastically speed up the noise exposure calculations from potential large numbers of UAS being operated for package delivery or other potential UAS ...
  • Seat and Occupant Response in Energy Absorbing Seats [supporting datasets]
    Taylor, Amanda M. ;
    Moorcroft, David M.
    2023-08-16 | ZIP
    This project will evaluate potential methods for replacement of worn seat cushions used in energy absorbing seats. Streamlined approaches to the replacement of worn cushions in aircraft seats have been requested by the aviation industry. The FAA developed a method for seats that do not require energy absorption (Part 25 and Part 23 passenger) based ...
    Dataset Supporting Files
  • Summary of Case Studies and Observations on Airport Experience with Pavement Surface Treatments
    Summary of Case Studies and Observations on Airport Experience with Pavement Surface Treatments
    Dzwilewski, Peter-Paul ;
    Peshkin, David
    2023-08-09 | PDF
    The Federal Aviation Administration Airport Technology Research and Development Branch sponsored a study of pavement surface treatments with two main objectives: to identify best practices and to propose guidance for selecting surface treatments as the appropriate treatment strategy for airport pavements. Twelve airports and agencies with surface t ...
  • Helicopter Noise Source Separation Using an Order Tracking Filter
    Helicopter Noise Source Separation Using an Order Tracking Filter
    Rachaprolu, Joel Sundar ;
    Greenwood, Eric
    2023-08-01 | PDF
    Due to the importance of understanding the aeroacoustics of rotorcraft with continually changing noise sources, this paper presents a new technique for source separation from ground-based acoustic measurements. The source separation process is based on combining a time-domain de-Dopplerization method with the Vold-Kalman (VK) order tracking filter ...
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