Heat Generation Of Aircraft Tires At Landing,
2022
University of Sussex
Heat Generation Of Aircraft Tires At Landing, Yu Li, Dr. Weiji Wang
International Journal of Aviation, Aeronautics, and Aerospace
When the aircraft lands on a runway, the great speed difference between tires and runway causes non-negligible friction and speeds up wheels. The generated heat rapidly raises tire temperature and causes material decomposition, which leads to replacement cost and flight safety issues; the chemical substances in the air can also cause emission problems. Many studies on aircraft tire temperature are based on software simulation or experiments. The simulation result may be affected by unnecessary variables due to cumbersome modelling, and the observation result may be inaccurate due to a particularly dynamic friction process. On the other side, there are few …
Uas For Public Safety: Active Threat Recognition,
2022
Embry-Riddle Aeronautical University
Uas For Public Safety: Active Threat Recognition, Joseph Cerreta, Tray Denney, Scott S. Burgess, Anthony Galante, David Thirtyacre, Gloria A. Wilson, Patrick Sherman
International Journal of Aviation, Aeronautics, and Aerospace
The Center for Homeland Defense and Security identified an increase of active threat events, such as mass shootings, annually since 1999. Literature suggests that 90% of shootings were over before law enforcement arrived at the scene and the first responder response was limited to “surround and contain” until Special Weapons and Tactics Teams (SWAT) arrived on the scene. Using Unmanned Aircraft Systems (UAS) to detect which individual was the threat and type of weapon used can provide useful information to increase the speed of the response for first-on-scene rather than waiting for SWAT if the type of weapon was known. …
Modelling Air Quality In An Aircraft Passenger Cabin Using Health Care Standards,
2022
Vector Vantage LLC
Modelling Air Quality In An Aircraft Passenger Cabin Using Health Care Standards, Bert Silich
International Journal of Aviation, Aeronautics, and Aerospace
The interest in aerosol contamination of aircraft passenger cabins has increased since the onset of the COVID-19 pandemic. Mathematical models have been developed to help describe how an aerosol behaves in a closed space. The number of infectious particles inhaled is of scientific interest because it can be related to the risk of getting ill from a pathogen. The data required to calculate these results is often difficult to obtain in real world settings. In fact, particle inhalation details are not obtained in the day-to-day routine of a health care environment and are they not required to maintain safety. Hospital …
Anthropometry Considerations In The Design And Evaluation Of Flight Deck Displays And Controls: Literature Review,
2022
Embry-Riddle Aeronautical University - Worldwide
Anthropometry Considerations In The Design And Evaluation Of Flight Deck Displays And Controls: Literature Review, Robert Joslin
International Journal of Aviation, Aeronautics, and Aerospace
The regulatory requirements and guidance for showing compliance with the Federal Aviation Administration anthropometric considerations in aircraft design are widely dispersed in an array of source documents. Consequently, they are difficult for aircraft manufacturers/applicants to identify, interpret, and address thereby extending the time to certify new/modified aircraft and aircraft systems. This literature review is intended to provide a compendium of the anthropometry considerations in the design certification of displays and controls in aircraft flight decks. This document is not a compliance document and the references herein are frequently updated, hence should be verified by the reader.
Aerodynamic Characterization Of An Elliptical Fairing In The Wake Of A Bluff Body,
2022
University of Central Florida
Aerodynamic Characterization Of An Elliptical Fairing In The Wake Of A Bluff Body, Luis Amaya
Electronic Theses and Dissertations, 2020-2023
Aerodynamic optimization is a key step in designing planes, cars, and even buildings. Numerical modeling is used to automate the optimization process and can use different methods to iterate through designs. In this process, consideration of the starting design is paramount as a poor choice can use up computational time and effort. Often, these designs are made with the intention of being out in the open, for which studies on shape variations in freestream situations abound. However, for the case where an object must be placed in the wake of another, there is little research. The study presented here aims …
Precise Landing Of Vtol Uavs Using A Tether,
2022
West Virginia University
Precise Landing Of Vtol Uavs Using A Tether, Jeremy W. Rathjen
Graduate Theses, Dissertations, and Problem Reports (ETD)
Unmanned Aerial Vehicles (UAVs), also known as drones, are often considered the solution to complex robotics problems. The significant freedom to explore an environment is a major reason why UAVs are a popular choice for automated solutions. UAVs, however, have a very limited flight time due to the low capacity and weight ratio of current batteries. One way to extend the vehicles' flight time is to use a tether to provide power from external batteries, generators on the ground, or another vehicle. Attaching a tether to a vehicle may constrain its navigation but it may also create some opportunities for …
Probabilistic Space Weather Modeling And Forecasting For The Challenge Of Orbital Drag In Space Traffic Management,
2022
West Virginia University
Probabilistic Space Weather Modeling And Forecasting For The Challenge Of Orbital Drag In Space Traffic Management, Richard J. Licata Iii
Graduate Theses, Dissertations, and Problem Reports (ETD)
In the modern space age, private companies are crowding the already-congested low Earth orbit (LEO) regime with small satellite mega constellations. With over 25,000 objects larger than 10 cm already in LEO, this rapid expansion is forcing us towards the enterprise on Space Traffic Management (STM). STM is an operational effort that focuses on conjunction assessment and collision avoidance between objects. While the equations of motion for objects in orbit are well-known, there are many uncertain parameters that result in the uncertainty of an object's future position. The force that the atmosphere exerts on satellite - known as drag - …
The Effects Of Geometry And Architecture Of Polymer Matrix Composites On Acoustic Emissions,
2022
The University of Akron
The Effects Of Geometry And Architecture Of Polymer Matrix Composites On Acoustic Emissions, John J. Bush, Alex D. Swartzentruber, Lukas B. Thompson, Sarah R. Pratt, Chris J. Kuhn
Williams Honors College, Honors Research Projects
The purpose of this project is to study how the variance of the geometry and architecture of polymer matrix composites (PMCs) affect the acoustic emissions measured whilst said structures are subjected to tensile stress. In these tests, a method called Modal AE will be utilized. In Modal AE, some relationships between sources and waves in various materials and geometries are presented in other papers/research. This study will focus on how different thickness and different makeup/ply patterns affect the acoustic emission tests. Some research has been completed and shown how energy attenuation affects the frequency content on PMCs similar to the …
Large, Complex Housing,
2022
The University of Akron
Large, Complex Housing, Alyssa Carnicella
Williams Honors College, Honors Research Projects
The purpose of this capstone project was to develop a design for a High Voltage Direct Current (HVDC) generator housing with built-in passageways for oil to flow through and cool the machine. The machine should be made using advanced manufacturing. A 3D model concept was designed with the use of SolidWorks. The appropriate hand calculations were completed to ensure that the generator housing would contain the components within itself under various environmental conditions.. The model was then 3D printed to produce a prototype that displays the design features within the housing. The next stage of the project will include completing …
Assessment Of Scientific Payload Carrying Spirulina Onboard Blue Origin’S New Shepard Vehicle,
2022
Embry-Riddle Aeronautical University
Assessment Of Scientific Payload Carrying Spirulina Onboard Blue Origin’S New Shepard Vehicle, Pedro J. Llanos, Morgan Shilling, Kristina Andrijauskaite, Kody Kidder, Vijay V. Duraisamy
Publications
The research team at ERAU and UTHSCSA analyzed the effects of suborbital flight stressors and various light conditions (red, white, no light) on the Arthrospira platensis (Spirulina), onboard Blue Origin’s New Shepard vehicle. Commercially available cyanobacterium species were cultivated and closely monitored in mother colonies several months before the suborbital flight mission. The aim of this study was to estimate the biomass production and growth as a potential dietary alternative for prospective human spaceflight's life support system. Spirulina samples were flown in a NanoLab with adjacent avionics supporting the light conditions and sensors to monitor the temperature, relative humidity, and …
Digital Image Correlation System Design, Verification And Analysis,
2022
The University of Akron
Digital Image Correlation System Design, Verification And Analysis, Tyler Kraft, Matthew J. Riczo, Andrew Chong
Williams Honors College, Honors Research Projects
Two dimensional digital image correlation provides an accurate and effective way to capture strain data on test sections with unusual or oblique geometries. The system requires a camera to record video footage, alignment fixtures and software to convert the footage into strain values. The system works by capturing the video footage of a specific portion of the specimen and comparing the movement of selected pixels. This is all done in the software GOM Correlate and Tracker. This test document outlines the setup, procedure, and validation steps to fulfill this goal. The setup involves a camera, tripod, blue lighting, and laser …
The Design Of The Payload System Of An Aircraft,
2022
The University of Akron
The Design Of The Payload System Of An Aircraft, Ryan Cooper
Williams Honors College, Honors Research Projects
The project group will design and build a system to unload packages for the Zips Aero Design Team's aircraft for the 2021-22 competition year.
Dirigible Anemometer Mount,
2022
The University of Akron
Dirigible Anemometer Mount, Matthew Stanko
Williams Honors College, Honors Research Projects
Airships, like any other aircraft, require sensor inputs in order to fly. One type of sensor is the anemometer. This project outlines the development of a mounting system which would attach 2 ultrasonic anemometers to the bottom of an aircraft. The study follows the entire engineering process from requirement derivation through conceptual designs, testing, analysis, and verification. The details of this report are confidential and therefore cannot be disclosed.
Aerodynamics Wind Tunnel Lab,
2022
The University of Akron
Aerodynamics Wind Tunnel Lab, James Soroczak, Brett Preslar
Williams Honors College, Honors Research Projects
The goal of this project is to create a lab for an aerodynamics class with the purpose of exploring the effects of various physical features and aerodynamic conditions on a wing. The main area of study will be the effects on lift, drag, and moment. To best display these effects, an airfoil/wing to wind tunnel interface with variable physical characteristics will be designed. The various physical alterations will be implemented to show the effect each one has on lift, drag, and moment. These alterations will include different aspect ratios, removable winglets, and various lengths. The airspeed and angle of attack …
Satellite Drag Coefficient Modeling For Thermosphere Science And Mission Operations,
2022
Missouri University of Science and Technology
Satellite Drag Coefficient Modeling For Thermosphere Science And Mission Operations, Piyush M. Mehta, Smriti N. Paul, Nicholas H. Crisp, Philip L. Sheridan, Christian Siemes, Günther March, Sean Bruinsma
Mechanical and Aerospace Engineering Faculty Research & Creative Works
Satellite drag modeling remains the largest source of uncertainty affecting space operations in low Earth orbit. The uncertainty stems from inaccurate models for mass density and drag coefficient. Drag coefficient modeling also impacts scientific knowledge on the physics and dynamics of the upper atmosphere through the estimation of high-fidelity mass density from measurements of acceleration on-board satellites. Efforts over the last decade have pushed drag coefficient modeling in the right direction, however, have resulted in multiple methods and tools. We provide a comprehensive review of the drag coefficient modeling methods and tools. Current scale differences between thermospheric data sets mostly …
Two-Level Targeter Convergence Study For Collinear Libration Point Spacecraft Formations,
2022
Missouri University of Science and Technology
Two-Level Targeter Convergence Study For Collinear Libration Point Spacecraft Formations, Donna Jennings, Henry J. Pernicka
Mechanical and Aerospace Engineering Faculty Research & Creative Works
Spacecraft formation flying has attracted an increasing amount attention over the past several decades including a growing interest in relative motion at the collinear lib ration points. This current work builds on previous efforts by further developing and characterizing a two-level targeting (TLT) algorithm used to determine relative motion at lib ration points by performing a convergence study. A parametric study was conducted to identify the sensitivity of the algorithm to a variety of inputs and constraints. The parametric study revealed that the two-level targeting algorithm convergence properties significantly improve when using a higher order initialization estimate. The size of …
High-Pressure Kinetic Interactions Between Co And H2 During Syngas Catalytic Combustion On Pdo,
2022
Missouri University of Science and Technology
High-Pressure Kinetic Interactions Between Co And H2 During Syngas Catalytic Combustion On Pdo, Ran Sui, John Mantzaras, Rolf Bombach, Meysam Khatoonabadi
Mechanical and Aerospace Engineering Faculty Research & Creative Works
The catalytic combustion of H2/CO/O2/N2 mixtures over PdO was investigated at pressures 3 to 10 bar, H2:CO volumetric ratios 1:5 to 3:1, and global equivalence ratios ψ = 0.13 and 0.23. The catalyst surface temperatures were controlled to 540-690 K, a range especially important for hybrid hetero-/homogeneous combustion approaches with large gas turbines at idle or part-load operation and for microreactors with recuperative small-scale turbines. In situ Raman measurements determined the major gas-phase species concentrations over the catalyst boundary layers in a channel-flow reactor, thermocouples monitored the surface temperatures, and surface characterization identified the catalyst oxidation state (PdO) and surface …
Spatial Transformation Of A Layer-To-Layer Control Model For Selective Laser Melting,
2022
Missouri University of Science and Technology
Spatial Transformation Of A Layer-To-Layer Control Model For Selective Laser Melting, Xin Wang, Robert G. Landers, Douglas A. Bristow
Mechanical and Aerospace Engineering Faculty Research & Creative Works
Selective Laser Melting (SLM) is an Additive Manufacturing (AM) technique with challenges in its complexity of process parameters and lack of control schemes. Traditionally, people tried time-domain or frequency-domain control methods, but the complexity of the process goes beyond these methods. In this paper, a novel spatial transformation of SLM models is proposed, which transforms the time-domain process into a spatial domain model and, thus, allows for state-space layer-to-layer control methods. In a space domain, this also provides the convenience of modelling laser path changes. Finally, a layer-to-layer Iterative Learning Control (ILC) method is designed and demonstrates the methodology of …
Aerodynamic Performance Of A Biologically Inspired Hybrid Plasma-Mechanical Flow Control And Sensing Device,
2022
West Virginia University
Aerodynamic Performance Of A Biologically Inspired Hybrid Plasma-Mechanical Flow Control And Sensing Device, Joseph Dygert
Graduate Theses, Dissertations, and Problem Reports (ETD)
The continued high global demand for passenger and freight air traffic along with increased use of unmanned aerial vehicles operating in broader Reynolds number regimes has resulted in researchers examining alternative technologies, which would result in safer, more reliable, and superior performing aircraft. Aerodynamic flow control may be one of the most promising approaches to solving this problem, having already proven its ability to enable higher flow efficiency while simultaneously improving overall control of flow behavior such as laminar-to-turbulent transition. Recent research in aerodynamic flow control has seen a pronounced growth in the areas of biomimicry and plasma flow control …
Aerodynamic Analysis Of Damage State Missiles Using Overset Meshing Techniques For Application To Computational Fluid Dynamics Simulation,
2022
West Virginia University
Aerodynamic Analysis Of Damage State Missiles Using Overset Meshing Techniques For Application To Computational Fluid Dynamics Simulation, Jonathan A. D'Alessio
Graduate Theses, Dissertations, and Problem Reports (ETD)
Significant research over the years has aimed to redefine the flight capabilities of aircraft after sustaining structural damage to critical components. Flight survivability and controllability are key areas of concern when designing fault-tolerant flight control systems to handle a wide range of potential scenarios. However, there is a lack of research on the impact of physically damaged missile systems. Missile counter-defense and intercept capabilities have become more advanced as the United States has focused heavily on these areas over the years. Damaged missiles due to a kinetic intercept capability present an opportunity for analysis of the post-damage implications on flight …
