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Showing 1 - 20 of 513 results
  • Blend Prediction Model for Vapor Pressure of Jet Fuel Range Hydrocarbons
    Blend Prediction Model for Vapor Pressure of Jet Fuel Range Hydrocarbons
    Boehm, Randall C. ;
    Parker, Robert
    2025-10-01 | PDF
    The ability to predict the vapor pressure and vapor-phase composition of hydrocarbon mixtures (such as jet fuel, sustainable aviation fuel or its un-refined precursors) and partially vaporized hydrocarbon mixtures is important to simulations of processes that involve vaporization such as distillations, flash points, combustion properties of partial ...
  • Geometric and Positional Isomer Effects on Ignition Behavior of Cycloalkanes Implications for Sustainable Aviation Fuels
    Geometric and Positional Isomer Effects on Ignition Behavior of Cycloalkanes: Implications for Sustainable Aviation Fuels
    Yang, Zhibin ;
    Faulhaber, Conor
    2025-09-01 | PDF
    This study investigates the ignition behavior of six dimethylcyclohexane (DMCH) isomers and cis-/trans-decalin, focusing on the effects of molecular geometry and substitution patterns. Ignition delay and derived cetane number (DCN) were measured using a CFR ignition quality tester under ASTM D6890 conditions. Among the DMCH isomers, cis-1,3-DMCH ex ...
  • An Experimental Evaluation of an Electronic Rotor Phase Synchronization System for Multirotor Aircraft Noise Control
    An Experimental Evaluation of an Electronic Rotor Phase Synchronization System for Multirotor Aircraft Noise Control
    Valente, Vítor T ;
    Greenwood, Eric
    2025-09-01 | PDF
    Multirotor electric vertical take-off and landing vehicles and small unmanned aircraft systems commonly use distributed electric propulsion. One approach to reducing their noise involves synchronizing rotor phase relationships to control radiated noise directionally. This paper presents a practical electronic phase synchronization method for multir ...
  • Modeling Uncertainties in Primary Zone Soot Predictions for a RichQuenchLean Combustion System
    Modeling Uncertainties in Primary Zone Soot Predictions for a Rich-Quench-Lean Combustion System
    Karpe, Shubham Basavaraj ;
    Menon, Suresh
    2025-08-01 | PDF
    A comprehensive uncertainty quantification (UQ) of soot volume fraction (SVF) predictions in the primary zone of a Rich-Quench-Lean (RQL) combustor is presented, with particular emphasis on the modeling uncertainties in the rates of nucleation, growth, oxidation, condensation, and coagulation. Large-eddy simulations (LES) of soot formation in a rea ...
  • Human Factors Guidance for the Integration of Artificial Intelligence and Machine Learning in FAA Systems
    Human Factors Guidance for the Integration of Artificial Intelligence and Machine Learning in FAA Systems
    Smith, Philip J. ;
    Roth, Emilie M.
    2025-07-31 | PDF
    The goal of this project has been to develop a document providing guidance on the integration of artificial intelligence (AI)/machine learning (ML) technologies within information automation in FAA systems to support safety critical operations for air traffic control, traffic flow management and technical operations (maintenance). In this document ...
  • Upgrading Biocrude Oil into Sustainable Aviation Fuel Using ZeoliteSupported IronMolybdenum Carbide Nanocatalysts
    Upgrading Biocrude Oil into Sustainable Aviation Fuel Using Zeolite-Supported Iron-Molybdenum Carbide Nanocatalysts
    Yu, Siying ;
    He, Haozhen
    2025-06-01 | PDF
    Food waste is an underdeveloped source for production of sustainable aviation fuel (SAF). Now, there is no certified conversion process of food waste for SAF by American Society for Testing and Materials (ASTM). We report the use of zeolite-supported molybdenum carbide nanocatalysts in upgrading biocrudes, produced from food wastes through HTL, int ...
  • Aircraft Wake Vortices An Annotated Bibliography 1921 2020
    Aircraft Wake Vortices: An Annotated Bibliography (1921 - 2020)
    Soares, Melanie A. ;
    Robins, Robert E.
    2025-05-01 | PDF
    This is an updated version of the "Hallock, J. N., Aircraft Wake Vortices: An Annotated Bibliography (1923 - 1990), DOT-FAA-RD-90-30 / DOT-VNTSC-FAA-90-7, 1991” and other related historical bibliographies. This annotated bibliography consists of abstracts of publications on aircraft wake vortices and related fields. This material was developed as p ...
  • Measurement of Spray Chamber Ignition Delay and Cetane Numbers for Aviation Turbine Fuels
    Measurement of Spray Chamber Ignition Delay and Cetane Numbers for Aviation Turbine Fuels
    Luecke, Jon ;
    Naser, Nimal
    2025-05-01 | PDF
    Experiments using pure compounds, National Jet Fuels Combustion Program (NJFCP) test fuels, and commercial jet fuels were conducted to demonstrate the equivalence of the indicated cetane number (ICN) and derived cetane number (DCN) for jet fuels. The calibrated range for ICN was also extended to lower cetane number (CN) values (5 to 35) to allow CN ...
  • Freezing Point of Hydrocarbon Fuels from Single Species Concentrations
    Freezing Point of Hydrocarbon Fuels from Single Species Concentrations
    Bell, David C ;
    Boehm, Randall C
    2025-02-24 | PDF
    The freezing point is an important property for determining the operating range of liquid hydrocarbon fuels. Many thermodynamic properties, like density, viscosity, and vapor pressure, have simple blending rules that can accurately predict the properties of a complex mixture. Freezing point, however, does not behave this way and shows nonlinear and ...
  • Assessment of Global Land Cover Changes Using Satellite Data Intermittent and LongTerm Land Cover Changes From 2001 to 2020
    Assessment of Global Land Cover Changes Using Satellite Data: Intermittent and Long-Term Land Cover Changes From 2001 to 2020
    Chen, Shuo ;
    Zhuang, Qianlai
    2025-02-01 | PDF
    Global land cover has changed during the past decades, influencing biogeochemical cycles and the global climate system. This study aimed to improve understanding of global land cover dynamics to enable more effective future land management practices and conservation actions. This study quantified interannual changes in global land cover types from ...
  • Pilot Vision
    Pilot Vision
    United States. Department of Transportation. Federal Aviation Administration. Civil Aerospace Medical Institute
    2025-01-17 | 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.
  • Air Travel Consumer Report December 2024
    Air Travel Consumer Report: December 2024
    United States. Department of Transportation. Office of Aviation Consumer Protection
    2024-12-01 | Air Travel Consumer Report Series | PDF
    The Air Travel Consumer Report is a monthly product of the Department of Transportation’s Office of Aviation Consumer Protection (OACP). The report is designed to assist consumers with information on the quality of services provided by the airlines. The report is divided into sections (Flight Delays, Mishandled Baggage Wheelchairs and Scooters, Ove ...
  • Effects of Wind on Multirotor UAS Noise Measurements
    Effects of Wind on Multirotor UAS Noise Measurements
    ElSharkawy, EzzEldin ;
    Valente, Vítor T
    2024-11-01 | PDF
    The aerodynamic and acoustic state of an aircraft depends strongly on its airspeed; however, most small multirotor Uncrewed Aerial Systems (UAS), or “drones,” fly autonomously using a fixed ground speed measured using onboard inertial sensors. In this work, a specially instrumented UAS with an air data system based on an ultrasonic anemometer that ...
  • A Regulatory Analysis and Process Improvement Decision Support Framework for Unmanned Aerial System UAS Noise Certification
    A Regulatory Analysis and Process Improvement Decision Support Framework for Unmanned Aerial System (UAS) Noise Certification
    Balchanos, Michael ;
    Ravikanti, Balaji
    2024-11-01 | PDF
    The rapidly growing Unmanned Aerial Systems (UAS) vehicle category with applications across various configurations and mission profiles introduces challenges in ensuring that applicable noise certification regulations are met. A framework is proposed for assessing regulatory compliance to noise standards and analyzing the process effectiveness and ...
  • Air Travel Consumer Report November 2024
    Air Travel Consumer Report: November 2024
    United States. Department of Transportation. Office of Aviation Consumer Protection
    2024-11-01 | Air Travel Consumer Report Series | PDF
    The Air Travel Consumer Report is a monthly product of the Department of Transportation’s Office of Aviation Consumer Protection (OACP). The report is designed to assist consumers with information on the quality of services provided by the airlines. The report is divided into sections (Flight Delays, Mishandled Baggage Wheelchairs and Scooters, Ove ...
  • Summary of Results Aerospace Medical Certification Services Airman Satisfaction Survey 2021
    Summary of Results: Aerospace Medical Certification Services – Airman Satisfaction Survey 2021
    Worthington, Kylie ;
    Yetter, Casey B.
    2024-10-16 | PDF
    The Civil Aerospace Medical Institute (CAMI) of the Federal Aviation Administration (FAA) has surveyed pilots who recently sought medical certification every approximately two years since 2006. The survey examines satisfaction with Aerospace Medical Certification Services (AMCS) provided by Aviation Medical Examiners (AME), FAA Regional Flight Surg ...
  • 2021 FAA Aerospace Medical Certification Services Airman Customer Satisfaction Survey [supporting dataset]
    Worthington, Kylie ;
    Hu, Peter T.
    2024-10-16 | ZIP
    The Civil Aerospace Medical Institute (CAMI) of the Federal Aviation Administration (FAA) has surveyed pilots who recently sought medical certification every approximately two years since 2006. The survey examines satisfaction with Aerospace Medical Certification Services (AMCS) provided by Aviation Medical Examiners (AME), FAA Regional Flight Surg ...
    Dataset Supporting Files
  • Incorporating Meander to Account for the Impact of Low Winds in Area Source Modeling AERMOD as a Case Study
    Incorporating Meander to Account for the Impact of Low Winds in Area Source Modeling; AERMOD as a Case Study
    Venkatram, Akula ;
    Pandey, Gavendra
    2024-10-01 | PDF
    A variety of sources of pollutant emissions can be represented as area sources. These include manure lagoons, landfills, wastewater treatment ponds, and highways. A group of point sources can also be treated as an area source. The impact of an area source is usually computed by representing the area source as a set of line sources perpendicular to ...
  • Contrail Altitude Estimation Using GOES16 ABI Data and Deep Learning
    Contrail Altitude Estimation Using GOES-16 ABI Data and Deep Learning
    Meijer, Vincent R ;
    Eastham, Sebastian D
    2024-10-01 | PDF
    The climate impact of persistent aircraft contrails is currently estimated to be comparable to that due to aviation-emitted CO2. A potential near-term and low-cost mitigation option is contrail avoidance, which involves rerouting aircraft around ice-supersaturated regions, preventing the formation of persistent contrails. Current forecasting method ...
  • Identifying Human Factors Research for Unmanned Aircraft Systems and Advanced Air Mobility
    Identifying Human Factors Research for Unmanned Aircraft Systems and Advanced Air Mobility
    Kaliardos, William N (Bill) ;
    Holbrook, Jon
    2024-10-01 | PDF
    This paper identifies some of the key human factors (HF) challenges when integrating Unmanned Aircraft Systems (UAS) and Advanced Air Mobility (AAM) into the civil airspace. Unique HF considerations—those which are derived from the key differentiating aspects of UAS/AAM compared to conventional aviation—are the primary basis for identifying HF rese ...
1 - 20 / 513