Computational Investigation Of Perforated Plate Film Cooling Utilizing Conjugate Heat Transfer, 2021 Embry-Riddle Aeronautical University
Computational Investigation Of Perforated Plate Film Cooling Utilizing Conjugate Heat Transfer, Jonathan Sippel
PhD Dissertations and Master's Theses
The accuracy of modern state-of-practice computational fluid dynamics approaches in predicting the cooling effectiveness of a perforated plate film-cooling arrangement is evaluated in ANSYS Fluent. A numerical investigation is performed using the Reynolds Averaged Navier Stokes equations and compared to NASA Glenn’s available Turbulent Heat Flux 4 experimental measurements collected as a part of the Transformational Tools and Technologies Project. A multiphysics approach to model heat conduction through the solid geometry is shown to offer significant improvements in wall temperature and film effectiveness prediction accuracy over the standard adiabatic wall approach. Additionally, localized gradient-based grid adaption is analyzed using ...
Improving The Performance Of An Ead Aircraft By Use Of A Retractable Electrode System, 2021 University of Arkansas, Fayetteville
Improving The Performance Of An Ead Aircraft By Use Of A Retractable Electrode System, Michael Alexander Fredricks
Mechanical Engineering Undergraduate Honors Theses
Electroaerodynamic (EAD) propulsion is a growing area of research for small, low powered aircraft. Recent tests of EAD aircraft have demonstrated low performance in unpowered, gliding flight. The purpose of this paper is to investigate the effect of a retractable electrode system on the flight performance of an EAD aircraft. An analysis of electrode drag contribution on the MIT ionic wind plane’s performance predicts a maximum lift to drag ratio of 22, with the addition of a retractable electrode system, for a similarly sized and modeled EAD aircraft. An experiment is developed using a prototype aircraft, launcher, and retraction ...
Design, Construction, And Flight Of A Remote-Controlled Aircraft For The 2020-21 Aiaa Dbf Competition, 2021 University of Tennessee, Knoxville
Design, Construction, And Flight Of A Remote-Controlled Aircraft For The 2020-21 Aiaa Dbf Competition, Jonathan A. Dixon, Caleb Weatherly, Satyam Mistry, Killian Samuels, Ethan Cerrito, Caleb Morgan, Sanghyeok Park, Sam Pankratz, Jamison Murphree
Chancellor’s Honors Program Projects
No abstract provided.
Airplane Pitch Response To Rapid Configuration Change: Flight Test And Safety Assessment, 2021 Florida Institute of Technology
Airplane Pitch Response To Rapid Configuration Change: Flight Test And Safety Assessment, Ralph Kimberlin, Markus Wilde, Brian Kish, Isaac Silver
Journal of Aviation Technology and Engineering
This paper examines airplane response to rapid flap extension on seven general aviation airplanes. The scenario involves a pilot flying in the traffic pattern becoming distracted, abruptly extending flaps while looking outside the airplane, and failing to notice airspeed and pitch-attitude changes. The airplanes tested reached pitch forces of up to 36 lbf, meeting FAA requirements but exceeding the capability of 55% of the population. Flight data showed a pitch-up to more than 30˚ in 5 s after flap extension, causing airspeed to drop below stall speed for four of the airplanes. At traffic pattern altitudes, stalling an airplane can ...
Hayabusa2'S Superior Solar Conjunction Mission Operations: Planning And Post-Operation Results, 2021 Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, Liverpool L69 3BX, UK;Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara 252-5210, Japan
Hayabusa2'S Superior Solar Conjunction Mission Operations: Planning And Post-Operation Results, Stefania Soldini, Hiroshi Takeuchi, Sho Taniguchi, Shota Kikuchi, Yuto Takei, Go Ono, Masaya Nakano, Takafumi Ohnishi, Takanao Saiki, Yuichi Tsuda, Fuyuto Terui, Naoko Ogawa, Yuya Mimasu, Tadateru Takahashi, Atsushi Fujii, Satoru Nakazawa, Kent Yoshikawa, Yusuke Oki, Chikako Hirose, Hirotaka Sawada, Tomohiro Yamaguchi, Makoto Yoshikawa
In late 2018, the asteroid Ryugu was in the Sun’s shadow during the superior solar conjunction phase. As the Sun-Earth-Ryugu angle decreased to below 3∘, the Hayabusa2 spacecraft experienced 21 days of planned blackout in the Earth-probe communication link. This was the first time a spacecraft had experienced solar conjunction while hovering around a minor body. For the safety of the spacecraft, a low energy transfer trajectory named Ayu was designed in the Hill reference frame to increase its altitude from 20 to 110 km. The trajectory was planned with the newly developed optNEAR tool and validated with real ...
The Effects Of Remotely Piloted Aircraft Command And Control Latency During Within-Visual-Range Air-To-Air Combat, 2021 Embry-Riddle Aeronautical University
The Effects Of Remotely Piloted Aircraft Command And Control Latency During Within-Visual-Range Air-To-Air Combat, David L. Thirtyacre
PhD Dissertations and Master's Theses
The type of military missions conducted by remotely piloted aircraft continues to expand into all facets of operations including air-to-air combat. While future within-visual-range air-to-air combat will be piloted by artificial intelligence, remotely piloted aircraft will likely first see combat. The purpose of this study was to quantify the effect of latency on one-versus-one, within-visual-range air-to-air combat success during both high-speed and low-speed engagements. The research employed a repeated-measures experimental design to test the various hypothesis associated with command and control latency. Participants experienced in air-to-air combat were subjected to various latency inputs during one-versus-one simulated combat using a virtual-reality ...
Ram Air-Turbine Of Minimum Drag, 2021 California Polytechnic State University, San Luis Obispo
Ram Air-Turbine Of Minimum Drag, Raymond Akagi
The primary motivation for this work was to predict the conditions that would yield minimum drag for a small Ram-Air Turbine used to provide a specified power requirement for a small flight test instrument called the Boundary Layer Data System. Actuator Disk Theory was used to provide an analytical model for this work.
Classic Actuator Disk Theory (CADT) or Froude’s Momentum Theory was initially established for quasi-one-dimensional flows and inviscid fluids to predict the power output, drag, and efficiency of energy-extracting devices as a function of wake and freestream velocities using the laws of Conservations of Mass, Momentum, and ...
Aircraft Input Files For Pylot And Machupx, 2021 Utah State University
Aircraft Input Files For Pylot And Machupx, Jaden Thurgood
Browse all Datasets
This data was used in an attempt at system identification for rudderless aircraft using simulation.
Disruptive Technologies With Applications In Airline & Marine And Defense Industries, 2021 Kansas State University
Disruptive Technologies With Applications In Airline & Marine And Defense Industries, Randall K. Nichols, Hans C. Mumm, Wayne Lonstein, Suzanne Sincavage, Candice M. Carter, John-Paul Hood, Randall Mai, Mark Jackson, Bart Shields
Disruptive Technologies With Applications in Airline, Marine, Defense Industries is our fifth textbook in a series covering the world of Unmanned Vehicle Systems Applications & Operations On Air, Sea, and Land. The authors have expanded their purview beyond UAS / CUAS / UUV systems that we have written extensively about in our previous four textbooks. Our new title shows our concern for the emergence of Disruptive Technologies and how they apply to the Airline, Marine and Defense industries. Emerging technologies are technologies whose development, practical applications, or both are still largely unrealized, such that they are figuratively emerging into prominence from a background of nonexistence or obscurity. A Disruptive technology is one that displaces an established technology and shakes up the industry or a ground-breaking product that creates a completely new industry.That is what our book is about. The authors think we have found technology trends that will replace the status quo or disrupt the conventional technology paradigms.The authors have collaborated to write some explosive chapters in Book 5:Advances in Automation & Human Machine Interface; Social Media as a Battleground in Information Warfare (IW); Robust cyber-security alterative / replacement for the popular Blockchain Algorithm and a clean solution for Ransomware; Advanced sensor technologies that are used by UUVs for munitions characterization, assessment, and classification and counter hostile use of UUVs against U.S. capital assets in the South China Seas. Challenged the status quo and debunked the climate change fraud with verifiable facts; Explodes our minds with nightmare technologies that if they ...
Can The Timeframe Of Reported Uas Sightings Help Regulators?, 2021 Embry-Riddle Aeronautical University Worldwide
Can The Timeframe Of Reported Uas Sightings Help Regulators?, Spencer Erik Pitcher, Kelly A. Whealan-George
Beyond: Undergraduate Research Journal
Remotely controlled small aircraft, otherwise known as Unmanned Aircraft Systems (UAS) or drones have started to impact the United States National Airspace System by interfering with the safe flight of aircraft. As the UAS industry continues its expected growth into the future, lawmakers, as well as regulators at the Federal Aviation Administration (FAA) and the aviation community must be able to predict when there will be more UAS craft in the air that could cause an interruption to air traffic so that more resources can be allocated optimally to counter the threat of UAS craft. The purpose of this study ...
Tooling Design Modeling For Composite Fuselage Of Beechcraft King Air 250 Using Catia, 2021 Changchun University of Science and Technology
Tooling Design Modeling For Composite Fuselage Of Beechcraft King Air 250 Using Catia, Miazor Fidelis Ekom
Journal of Aviation Technology and Engineering
Aircraft’s constant operation in tough conditions necessitates the need for structural components of high strength yet low weight. Composite materials are being used as an alternative to conventional aluminum alloys because of their competitive strength-to-weight and stiffness-to-weight ratios. In this paper, the detailed design procedure of a light-aircraft composite material fuselage tooling in three dimensions is shown. In its operation, the layup tools provide a surface for the composite part which is the correct shape of the part and is stable through the cure cycle, and also providing a means of indexing the part for the next manufacturing operation ...
Viability And Application Of Mounting Personal Pid Voc Sensors To Small Unmanned Aircraft Systems, 2021 Embry-Riddle Aeronautical University
Viability And Application Of Mounting Personal Pid Voc Sensors To Small Unmanned Aircraft Systems, Cheryl Lynn Marcham, Scott Burgess, Joseph Cerreta, Patti J. Clark, James P. Solti, Brandon Breault, Joshua G. Marcham
Using a UAS-mounted sensor to allow for a rapid response to areas that may be difficult to reach or potentially dangerous to human health can increase the situational awareness of first responders of an aircraft crash site through the remote detection, identification, and quantification of airborne hazardous materials. The primary purpose of this research was to evaluate the remote sensing viability and application of integrating existing commercial-off-the-shelf (COTS) sensors with small unmanned aircraft system (UAS) technology to detect potentially hazardous airborne contaminants in emergency leak or spill response situations. By mounting the personal photoionization detector (PID) with volatile organic compound ...
Measurements Of Wind Turbine Wake Evolution And Trajectory During Morning Boundary Layer Transition And Under Wake Steering Conditions Via Unmanned Aerial Vehicles, Stewart Nelson
Theses and Dissertations--Mechanical Engineering
In July of 2019, a flight campaign was conducted using semi-autonomous Unmanned Aerial Vehicles (UAVs) at the Port Alma Kruger Energy wind farm in Ontario, Canada, to study various aspects of wind turbine wake evolution. Horizontal transects across the wakes were measured using modified fixed-wing aircraft fitted with a five-hole probe to measure the wind velocity vector. Reference boundary layer conditions were measured by an octocopter with an assortment of mounted sensors flying vertical profiles upstream of the turbines. Three experiments were conducted during the campaign, which consisted of a study on wake behavior during the morning boundary layer transition ...
Dji Drone Modification, 2021 The University of Akron
Dji Drone Modification, Sean Lacey, Seth Mancuso, Bryce Mckenzie
Williams Honors College, Honors Research Projects
For this project, we set out to create a lightweight carrying case that would be mounted to a DJI Phantom 3. This case is designed to transport small packages, such as medications, from a delivery vehicle to their final destination. Based on our maximum drone lifting capacity of 600 grams, our case, servomotor, and contents had to weigh less than or equal to that value. The coronavirus pandemic has led to an increase in contactless delivery options along with the push for immunocompromised people to avoid contact with people that may be sick. Our product would help transport necessary supplies ...
Comparative Study On The Prediction Of Aerodynamic Characteristics Of Mini - Unmanned Aerial Vehicle With Turbulence Models, 2021 Vellore Institute of Technology, Vellore
Comparative Study On The Prediction Of Aerodynamic Characteristics Of Mini - Unmanned Aerial Vehicle With Turbulence Models, Somashekar V, Immanuel Selwyn Raj A
International Journal of Aviation, Aeronautics, and Aerospace
When dealing with CFD simulations the turbulent nature is seen on most of the engineering flows and these flows need to be solved. Reliable and applicable CFD outputs can be obtained from the accurate modelling of the turbulence as it is one of the most vital elements of CFD modelling. The RANS equations are extensively employed to analyse the complex flows over aircraft and for this purpose, a turbulence model is needed for turbulent flow analyses. Compatible turbulence must be chosen for the exact predictions of aircraft aerodynamic characteristics. In this report, numerical analyses of Mini-UAV are done to compare ...
Constrained Motion Analysis Of Spacecraft Trajectory In Restricted Three Body Problem, 2020 Embry-Riddle Aeronautical University
Constrained Motion Analysis Of Spacecraft Trajectory In Restricted Three Body Problem, Harshkumar Patel
PhD Dissertations and Master's Theses
Due to the popularity of libration points, many satellites are being maintained on their desired trajectory. Indian space research organization has planned to launch the Aditya-L1 spacecraft to study about the Sun by 2021. James Webb Space Telescope has also been designed to observe deep space at L2 in the Sun-Earth system by 2021. The combined gravity of the Earth and the Sun keep satellite’s orbit locked at libration points. Though satellites enjoys an uninterrupted view of Sun and Earth all the time, they are affected by the solar radiation pressure (SRP) continuously. Due to the instability of collinear ...
Cooperative Aerial Search And Localization Using Lissajous Patterns, 2020 United States Military Academy
Cooperative Aerial Search And Localization Using Lissajous Patterns, Josiah Steckenrider, Spencer Leamy, Tomonari Furukawa
West Point Research Papers
This paper presents a cooperative aerial search-and-localization framework for applications where knowledge about the target of concern is minimal. The proposed framework leverages the sweeping oscillatory properties of Lissajous curves to improve an agent's chances of encountering a target. To accurately estimate the states of cooperative search drones, a discrete-time linear Lissajous motion model approximation is presented in such a way that uncertainty in physical model parameters can be accounted for. These uncertainties are propagated through estimation formulas to improve both agent and target localization relative to a static base station. Numerous experiments conducted in a physics-driven simulation environment ...
Celebrating 90-Orbits Around The Sun, 2020 Southwestern Oklahoma State University
Celebrating 90-Orbits Around The Sun, Stafford Air & Space Museum
In celebration of the 90th birthday of Oklahoma astronaut and aerospace legend, Gen. Thomas P. Stafford, the Stafford Air & Space Museum in Weatherford, Oklahoma is offering free admission on September 17th, 2020.
Three-Dimensional, Vision-Based Proportional Navigation For Uav Collision Avoidance, 2020 Embry-Riddle Aeronautical University
Three-Dimensional, Vision-Based Proportional Navigation For Uav Collision Avoidance, Guanhong Gao
PhD Dissertations and Master's Theses
As the number of potential applications for Unmanned Aerial Vehicles (UAVs) keeps rising steadily, the chances that these devices will operate in close proximity to static or dynamic obstacles also increases. Therefore, collision avoidance is an important challenge to overcome for Unmanned Aerial Vehicle operations. Electro-optical devices have several advantages such as light weight, low cost, low algorithm requirements with respect to computational power and possibly night vision capabilities. Therefore, vision-based Unmanned Aerial Vehicle collision avoidance has received considerable attention. Although much progress has been made in collision avoidance systems (CAS), most approaches are focused on two-dimensional environments. In order ...
Power-Over-Tether Uas Leveraged For Nearly-Indefinite Meteorological Data Acquisition, 2020 University of Nebraska - Lincoln
Power-Over-Tether Uas Leveraged For Nearly-Indefinite Meteorological Data Acquisition, Daniel Rico, Carrick Detweiler, Francisco Muñoz-Arriola
Computer Science and Engineering: Theses, Dissertations, and Student Research
Use of unmanned aerial systems (UASs) in agriculture has risen in the past decade. These systems are key to modernizing agriculture. UASs collect and elucidate data previously difficult to obtain and used to help increase agricultural efficiency and production. Typical commercial off-the-shelf (COTS) UASs are limited by small payloads and short flight times. Such limits inhibit their ability to provide abundant data at multiple spatiotemporal scales. In this paper, we describe the design and construction of the tethered aircraft unmanned system (TAUS), which is a novel power-over-tether UAS leveraging the physical presence of the tether to launch multiple sensors along ...