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Showing 241 - 260 of 617 results
  • NearLean Blow Off Dynamics in a Liquid Fueled Combustor
    Near-Lean Blow Off Dynamics in a Liquid Fueled Combustor
    Rock, Nicholas ;
    Emerson, Ben
    2019-10-01 | PDF
    This paper describes an analysis of the near-lean blow off(LBO) dynamics of spray flames, including the influence of fuel composition upon these dynamics. It is motivated by the fact that, while reasonable correlations exist for predicting blow off conditions, the fundamental reasons for why flames supported by flow recirculation actually blow off ...
  • Aviation Environmental Design Tool AEDT Technical Manual Version 3b
    Aviation Environmental Design Tool (AEDT): Technical Manual, Version 3b
    Lee, Cynthia ;
    Thrasher, Ted
    2019-09-06 | PDF
    The Federal Aviation Administration, Office of Environment and Energy (FAA-AEE) has developed the Aviation Environmental Design Tool (AEDT) version 3b software system with the support of the following development team: FAA, National Aeronautics and Space Administration (NASA), U.S. DOT Volpe National Transportation Systems Center (Volpe Center), AT ...
  • Established on Required Navigation Performance EoR RNP Human Factors Implementation Guidance for Air Traffic Control Facilities within the National Airspace System Phase II Final Report
    Established on Required Navigation Performance (EoR) (RNP): Human Factors Implementation Guidance for Air Traffic Control Facilities within the National Airspace System [Phase II Final Report]
    Thomas, Lauren ;
    Serrato, Alicia
    2019-09-03 | PDF
    The Federal Aviation Administration (FAA) NextGen Human Factors Division commissioned this research to identify and share lessons learned from air traffic control facilities that were “early adopters” of Established on Required Navigation Performance (EoR) (RNP) procedures. Based on a review of relevant concept validation documentation and research ...
  • HumanAutomation Teaming Unintended Impacts and Mitigations for Degraded NextGen Operations
    Human-Automation Teaming: Unintended Impacts and Mitigations for Degraded NextGen Operations
    Smith, Philip J. ;
    Baumann, Emily
    2019-09-01 | PDF
    The goal of this report is to provide insights regarding the potential unintended negative impacts that the introduction of automation can have on human performance and resultant system behavior when a decision support system fails or exhibits degraded performance. It further provides human factors guidance on methods to mitigate potential risks to ...
  • Aviation Environmental Design Tool AEDT Version 3b AEDT Standard Input File ASIF Reference Guide
    Aviation Environmental Design Tool (AEDT): Version 3b: AEDT Standard Input File (ASIF) [Reference Guide]
    United States. Department of Transportation. Federal Aviation Administration
    2019-09-01 | PDF
    The AEDT Standard Input File (ASIF) provides a standard file format to allow for the import of data into AEDT. The ASIF format allows users to create a new study by importing a complete study including airports, scenarios, cases, operations, tracks, and other study definitions. Users can also use the partial ASIF import to import data into an exist ...
  • AEDT Version 3b Installation Guide
    AEDT Version 3b [Installation Guide]
    United States. Department of Transportation. Federal Aviation Administration
    2019-09-01 | PDF
    This document provides detailed instructions on how to install and run AEDT 3b. It is important to follow the installation instructions in the order listed below, as Microsoft SQL Server 2012 is a prerequisite for AEDT 3b. Installation components must run locally. 1. Install Microsoft SQL Server 2012 2. Install AEDT 3b To install software, the user ...
  • AEDT Version 3b User Guide
    AEDT Version 3b [User Guide]
    Lee, Cynthia ;
    Thrasher, Ted
    2019-09-01 | PDF
    The Federal Aviation Administration, Office of Environment and Energy (FAA-AEE) has developed the Aviation Environmental Design Tool (AEDT) version 3b software system with the support of the following development team: FAA, National Aeronautics and Space Administration (NASA), U.S. DOT Volpe National Transportation Systems Center (Volpe Center), AT ...
  • AEDT Version 3b User Guide Supplemental
    AEDT Version 3b [User Guide Supplemental]
    United States. Department of Transportation. Federal Aviation Administration
    2019-09-01 | PDF
    The Federal Aviation Administration Office of Environment and Energy (FAA-AEE) recognizes that the environmental consequences stemming from the operation of commercial aviation – primarily noise, emissions, and fuel consumption – are highly interdependent and occur simultaneously throughout all phases of flight. The Aviation Environmental Design To ...
  • Accelerated Load Testing of Geosynthetic Base ReinforcedStabilized Unpaved and Pavement Test Sections
    Accelerated Load Testing of Geosynthetic Base Reinforced/Stabilized Unpaved and Pavement Test Sections
    Abu-Farsakh, Murad Y. ;
    Chen, Qiming
    2019-08-01 | PDF
    This research study aims at evaluating the benefits of using geosynthetics to reinforce/stabilize base aggregate layer/subgrade in pavements under repeated loading test conditions. For this purpose, a total of six 80-ft long and 13 ft wide full-scale test lane sections were constructed, among which two sections were reinforced by one or two layers ...
  • Chemical Compositions and Properties of LigninBased Jet Fuel Range Hydrocarbon
    Chemical Compositions and Properties of Lignin-Based Jet Fuel Range Hydrocarbon
    Ruan, Hao ;
    Qin, Yulin
    2019-08-01 | PDF
    Sustainable aviation fuels remain the only near, mid, and likely long term solution for lowering the carbon emissions of commercial and military aviation. Determination of sustainable aviation fuel’s chemical compositions and prediction of their properties is a critical first step for further research and development leading to the final certificat ...
  • On Estimating Physical and Chemical Properties of Hydrocarbon Fuels Using MidInfrared FTIR Spectra and Regularized Linear Models
    On Estimating Physical and Chemical Properties of Hydrocarbon Fuels Using Mid-Infrared FTIR Spectra and Regularized Linear Models
    Wang, Yu ;
    Ding, Yiming
    2019-07-01 | PDF
    The concept of a compact, economical FTIR-based analyzer for estimating the properties of hydrocarbon fuels with small amounts of fuel is proposed. The high correlations between mid-IR FTIR absorption spectra of fuel vapor in the range 3300–3550 nm and 15 physical and chemical properties, such as density, initial boiling point, surface tension, kin ...
  • A Streamlined Approach to HybridChemistry Modeling for a Low CetaneNumber Alternative Jet Fuel
    A Streamlined Approach to Hybrid-Chemistry Modeling for a Low Cetane-Number Alternative Jet Fuel
    Pinkowski, Nicolas H ;
    Wang, Yu
    2019-07-01 | PDF
    The development of renewable, alternative jet fuels presents an exigent challenge to the aviation community. In this work, a streamlined methodology for building computationally efficient kinetic models of real fuels from shock tube experiments is developed and applied to a low cetane-number, broad-boiling alternative jet fuel (termed C-4). A multi ...
  • Advanced Operational Procedure Design Concepts for Noise Abatement
    Advanced Operational Procedure Design Concepts for Noise Abatement
    Thomas, Jacqueline ;
    Yu, Alison
    2019-06-01 | PDF
    Performance based navigation has led to increased noise complaints due to the concentration of flight tracks. However, performance based navigation allows the opportunity to design advanced operational flight procedures for the purposes of noise abatement. A study of various advanced operational procedure concepts for noise abatement is presented. ...
  • Aircraft Noise Modeling of Dispersed Flight Tracks and Metrics for Assessing Impacts
    Aircraft Noise Modeling of Dispersed Flight Tracks and Metrics for Assessing Impacts
    Yu, Alison ;
    Hansman, R. John
    2019-05-01 | PDF
    The implementation of Performance Based Navigation (PBN), such as Area Navigation (RNAV) and Required Navigation Performance (RNP), has led to aircraft being able to fly designed flight tracks very precisely. This has led to communities citing the concentration of aircraft along one flight track as a noise issue because of the frequent overflights ...
  • Noise What is to be Done
    Noise: What is to be Done?
    Basner, Mathias
    ORCID ICON IMG
    2019-04-01 | PDF
    Hearing loss is one of the most severe health effects of noise with 1.3 billion affected people worldwide (1). However, health effects of noise go far beyond hearing. The so-called non-auditory effects of noise include annoyance reactions of the exposed population, sleep disturbance, school children’s learning impairment, and cardiovascular disease ...
  • MultiWavelength Speciation of HighTemperature 1 1Butene Pyrolysis
    Multi-Wavelength Speciation of High-Temperature 1 1-Butene Pyrolysis
    Pinkowski, Nicolas H ;
    Cassady, Sean J
    2019-02-01 | PDF
    Species time-history measurements provide important kinetics targets for the development and validation of detailed reaction models. Here, a multi-wavelength, multi-species laser absorption strategy is demonstrated that provides high-bandwidth species time-histories during 1-butene pyrolysis behind reflected shock waves. Measured shock tube absorba ...
  • SCOPE11 Method for Estimating Aircraft Black Carbon Mass and Particle Number Emissions
    SCOPE11 Method for Estimating Aircraft Black Carbon Mass and Particle Number Emissions
    Agarwal, Akshat ;
    Speth, Raymond
    2019-01-01 | PDF
    Black carbon (BC) emissions from aircraft engines lead to an increase in the atmospheric burden of fine particulate matter (PM2.5). Exposure to PM2.5 from sources, including aviation, is associated with an increased risk of premature mortality, and BC suspended in the atmosphere has a warming impact on the climate. BC particles emitted from aircraf ...
  • FAA Aerospace Forecast Fiscal Years 20192039
    FAA Aerospace Forecast: Fiscal Years 2019-2039
    United States. Department of Transportation. Federal Aviation Administration
    2019-01-01 | PDF
    The FAA Aerospace Forecasts are developed to support budget and planning needs of the FAA. The forecasts are developed using statistical models to explain and incorporate emerging trends of the different segments of the aviation industry.
  • A MultiWavelength Speciation Framework for HighTemperature Hydrocarbon Pyrolysis
    A Multi-Wavelength Speciation Framework for High-Temperature Hydrocarbon Pyrolysis
    Pinkowski, Nicolas H ;
    Ding, Yiming
    2018-12-01 | PDF
    A framework for the study of high-temperature hydrocarbon pyrolysis is presented. The proposed frame- work details a multi-wavelength speciation method using convex optimization, a review of complementary fixed-wavelength laser diagnostics, and a database of high-temperature absorption cross-sections to enable use of the framework for 11 different ...
  • Aviation Impact on Air Quality Present Day and MidCentury Simulated in the Community Atmosphere Model CAM
    Aviation Impact on Air Quality Present Day and Mid-Century Simulated in the Community Atmosphere Model (CAM)
    Phoenix, Daniel ;
    Khodayari, Arezoo
    2018-10-01 | PDF
    The projected increase in global air traffic raises concerns about the potential impact aviation emissions have on climate and air quality. Previous studies have shown that aircraft non-landing and take-off (non-LTO) emissions (emitted above 1 km) can affect surface air quality by increasing concentrations of ozone (O3) and fine particles (PM2.5). ...
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