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Showing 201 - 220 of 515 results
  • 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 ...
  • 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.
  • 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 ...
  • 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). ...
  • FAA Center of Excellence for Alternative Jet Fuels Environment Annual Technical Report For the Period October 1 2017 September 30 2018
    FAA Center of Excellence for Alternative Jet Fuels & Environment: Annual Technical Report: For the Period October 1, 2017 – September 30, 2018
    ASCENT Aviation Sustainability Center
    2018-09-30 | PDF
    This report covers the period October 1, 2017 through September 30, 2018. 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 will be hosted by the Georgia Institute of Technology, April 18-19, 2019 in At ...
  • The AlcoholtoJet Conversion Pathway for DropIn Biofuels TechnoEconomic Evaluation
    The Alcohol-to-Jet Conversion Pathway for Drop-In Biofuels: Techno-Economic Evaluation
    Geleynse, Scott ;
    Brandt, Kristin
    2018-09-01 | PDF
    Alcohol-to-jet (ATJ) is a process for the conversion of alcohols to an alternative jet fuel blendstock based on catalytic steps historically utilized by the petroleum refining and petrochemical industry. This pathway provides a means for producing a sustainable alternative jet fuel (SAJF) from a wide variety of resources, offering a near term oppor ...
  • Preliminary Development and Flight Trials of a Cruise Altitude and Speed Optimization Decision Support Tool
    Preliminary Development and Flight Trials of a Cruise Altitude and Speed Optimization Decision Support Tool
    Li, Clement ;
    Hansman, R. John
    2018-09-01 | PDF
    A cruise altitude and speed optimization decision support tool, based on the concept of a minimum cost altitude tunnel, was developed to aid flight crew and dispatcher situational awareness and decision-making in vertical trajectory planning in order to reduce fuel and time costs. As the optimal altitude for an aircraft changes with speed, weight, ...
  • Pilot Study on Aircraft Noise and Sleep Disturbance Final Report
    Pilot Study on Aircraft Noise and Sleep Disturbance. Final Report
    Basner, Mathias
    ORCID ICON IMG
    2018-09-01 | PDF
    Aircraft noise can disturb sleep and impair recuperation. Research is needed to develop exposure-response relationships that are representative of noise-exposed communities and can be used to inform noise mitigation policy. For a national field study on physiologic response to aircraft noise during sleep to be feasible, an inexpensive yet sound stu ...
  • Potential for Pennycress to Support a Renewable Jet Fuel Industry
    Potential for Pennycress to Support a Renewable Jet Fuel Industry
    Markel, Evan ;
    English, Burton C
    2018-08-01 | PDF
    Pennycress, an oilseed plant with high oil content, is being considered as a second-generation biofuel feedstock. The plants lifecycle fits with traditional U.S. crop rotations. This study examines the economic feasibility of pennycress production, its potential to supply a renewable aviation industry and its potential impacts on the U.S. economy. ...
  • DataDriven Flight Procedure Simulation and Noise Analysis in a LargeScale Air Transportation System
    Data-Driven Flight Procedure Simulation and Noise Analysis in a Large-Scale Air Transportation System
    Jensen, Luke ;
    Hansman, R. John
    2018-07-01 | PDF
    Aircraft noise is a growing source of community concern around airports. Despite the introduction of quieter aircraft, increased precision of onboard guidance systems has resulted in new noise impacts driven by overflight frequency effects. Noise issues present a potential barrier to the continued rollout of advanced operational procedures in the U ...
  • Kinetic Analysis of Distinct Product Generation in Oxidative Pyrolysis of Four Octane Isomers
    Kinetic Analysis of Distinct Product Generation in Oxidative Pyrolysis of Four Octane Isomers
    Wang, Kun ;
    Bowman, CT
    2018-07-01 | PDF
    The molecular structures of hydrocarbon fuels are known to have a substantial impact on their combustion properties. However, the relationship between the fuel structure and thermal decomposition intermediate products, which determine the global combustion behaviors, is not as well known. In this study, four octane isomers, n-octane, 2,5-dimethylhe ...
  • Established on Required Navigation Performance EoR RNP Concept Validation and Implementation Plans Human Factors Gap Analysis Phase 1 Final Report
    Established on Required Navigation Performance (EoR) (RNP) Concept Validation and Implementation Plans: Human Factors Gap Analysis [Phase 1 Final Report]
    Thomas, Lauren ;
    Serrato, Alicia
    2018-05-30 | PDF
    The Federal Aviation Administration (FAA) NextGen Human Factors Division commissioned this research to identify and share lessons learned from two air traffic control facilities that were “early adopters” of Established on Required Navigation Performance (EoR) (RNP) procedures. Seattle-Tacoma International Airport and Denver International Airport w ...
  • The Impact of NOx Emissions From Lightning on the Production of AviationInduced Ozone
    The Impact of NOx Emissions From Lightning on the Production of Aviation-Induced Ozone
    Khodayaria, Arezoo ;
    Vitt, Francis
    2018-05-01 | PDF
    Due to the non-linear nature of ozone production in the troposphere, ozone production as a function of aviation nitrogen oxide (NOx = NO + NO2) emissions varies based on the background NOx levels. Of the several different sources of background NOx in the atmosphere, NOx from lightning (LNOx) contributes a substantial amount of NOx to the upper trop ...
  • Effect of Residual Oxygenated Functional Groups on the Behavior of Alternative Jet Fuel Properties Project 31B
    Effect of Residual Oxygenated Functional Groups on the Behavior of Alternative Jet Fuel Properties (Project 31B)
    Garcia-Perez, Manuel
    2018-04-29 | PDF
    The goal of this project is the identification of the nature and the content of the oxygenated compounds present in alternative jet fuels and to develop methods for the fast identification of these oxygenated compounds. The chemical composition and fuel properties of nine alternative jet fuels (named as AJF 1-9) and three commercial jet fuels (name ...
201 - 220 / 515