Aerospace Engineering Commons^™

Investigation Of Bio-Inspired Pin Geometries For Heat Transfer Applications, Anish Prasad

Doctoral Dissertations and Master's Theses

Array of circular cylindrical pins or tubes are one of the most widely used type of convection cooling systems, profoundly used in the internal cooling of gas turbine blades. They promote heat transfer due to flow acceleration, secondary flows and wake shedding, at the expense of large pressure loss and unsteadiness in the flow. The need to reduce pressure loss and maintain the heat transfer rates are a much needed requirement for a variety of industries to improve the cooling efficiency. One such prominent line of research is conducted on optimizing the design of the circular cylindrical pins to increase …

Data-Driven Architecture To Increase Resilience In Multi-Agent Coordinated Missions, D. F.

Doctoral Dissertations and Master's Theses

The rise in the use of Multi-Agent Systems (MASs) in unpredictable and changing environments has created the need for intelligent algorithms to increase their autonomy, safety and performance in the event of disturbances and threats. MASs are attractive for their flexibility, which also makes them prone to threats that may result from hardware failures (actuators, sensors, onboard computer, power source) and operational abnormal conditions (weather, GPS denied location, cyber-attacks). This dissertation presents research on a bio-inspired approach for resilience augmentation in MASs in the presence of disturbances and threats such as communication link and stealthy zero-dynamics attacks. An adaptive bio-inspired …

Performance Profile Testing Of The Dassault Falcon 10/100, Thomas Henry Bolek Roman

Theses and Dissertations

The objective of the performance profile and flight testing comparison is to practice flight test theory on a turbofan-powered aircraft, compare results to Dassault published parameters, and give insight on how this may become a module for the flight test engineering program at Florida Tech. The performance experiments conducted were takeoff performance, level acceleration, level flight performance, stall speed, and roll performance. Takeoff distance was observed using the data from the Stratus ADSB receiver, which gave GPS coordinates; additionally, takeoff distance was measured via Google Earth from the start and the takeoff location observed by the co-pilot. The takeoff field …

Extraction Of Pendulum Model Parameters From Steady-State Slosh Data With Adaptive Gradient Descending Optimization Method For Spacecraft Propellant Tanks, Tengjie Gao

Theses and Dissertations

This thesis proposes a new experimental approach to extract pendulum model parameters from spacecraft propellant tank slosh data. The novelty of the approach is in the utilization of steady-state triaxial force measurements at the support points of the tank under sinusoidal excitation, which enables repeatable and accurate determination of pendulum model parameters in contrast to the single-axis force sensing and multiple repetitions averaging techniques associated with the more common decay approach. This approach may be used for tanks with free slosh; however, this thesis considers a diagram tank with three different diaphragm configurations under translational oscillatory lateral excitation. With the …

Stability And Control Flight Testing Of The Dassault Falcon 10/100, Andres Mauricio Alarcon Vega

Theses and Dissertations

The Falcon 10/100 is a transport category aircraft developed by Dassault Aviation in 1971. Production of the aircraft ceased in 1989, but it remains available on the secondhand market. Certification for these types of aircraft follow FAR Part 25 of the code of federal regulations. Aircraft stability and control flying qualities are dependent on the mission profile and intended use case of the aircraft. External factors, such as turbulence, are relevant for transport category aircraft because poor stability could affect the flying characteristics and result in an unpleasant ride. On the other hand, in a trimmed condition, an aircraft with …

Scaling Laws For Fixed-Wing Single-Engine Electric Propulsion Systems, Fnu Hem Lata

Theses and Dissertations

The rise of new aircraft propulsion methods (e.g., powered by batteries, fuel cells, or hybrid electric systems), the increased use of automated and integrated flight control systems, and the envisioned use of personal Vertical Take-off and Landing (VTOL) vehicles in urban environments (urban aerial mobility) lead to novel technical and regulatory challenges for aircraft manufacturers, certification authorities and operators. Of primary concern are operational safety and closely connected pilot situation awareness and workload. The Trajectory Energy Management task involves manipulating flight and propulsion controls to achieve a planned flight profile. The key areas to focus on in Trajectory Energy Management …

Design And Evaluation Of A Variable Camber Morphing Wing With Compliant Flex Core And Retractable Wing Skin, Ferruccio Rossi

Theses and Dissertations

Wing morphing was investigated as an alternative to conventional discrete flight control surfaces to provide aircraft attitude control, performance, and to enhance wing aerodynamic efficiency. A variable camber morphing wing design with 100 cm span and 34 cm chord was proposed for small UAVs operated at low velocity. The proposed morphing wing design generated trailing edge deflections via the combined action of an inner complaint flex core structure and a retractable wing skin. Wing morphing was produced by linear servos that extended and retracted the upper and lower wing skin and produced a controlled deformation of the inner complaint flex …

Analytical Airflow Solution Of A Helicopter Engine Bay And Novel Bay Cooling Cowling Design, Daniel Evan Yastishock

Theses and Dissertations

The objective of this thesis is to develop an analytical-numerical solution for the engine bay cooling airflow in a representative helicopter based on the Augusta-Westland 101, and evaluate the performance of a novel rotating scoop cowling on the airflow. The methodology was created in PythonTM. Results obtained via the analytical method were compared against a CFD model constructed with Ansys® at a hover, 50 fps forward flight, and 250 feet per second forward flight using a k−ε turbulence model. Performance of the rotating scoop was compared to that of a conventional inlet orifice and fixed scoop in a similar airspeed …

Testing And Performance Analysis Of A New Wireless Sensors Network (Wsn) System For Hurricane Monitoring, Jianing Wang

Theses and Dissertations

Researchers at the Florida Institute of Technology (FIT) have developed the wireless sensor network system for the field measurement of hurricane wind and pressure on residential structures. A new version of the system is developed using the latest state-of-the-art technologies which performance is tested during the passing of hurricane Isaias (2020) and the Wall of Wind (WOW) at Florida International University (FIU). The old version system sensors were applied during hurricane Dorian (2019). For the three events, 25 pressure sensors and one anemometer were placed on the roof of a single-story house. Hurricane Dorian data was collected for 72 hours …

Hydrogen/Diesel Co-Combustion In Compression Ignition Engines Through Hydrogen Ingestion And Direct Hydrogen Injection, Helge Hening Von Helldorff-Garn

Theses and Dissertations

This dissertation develops, implements, and validates the computational tools necessary for the computational simulation of hydrogen-enhanced Diesel combustion for premixed hydrogen charges ingested into the intake air and for direct injected hydrogen pilot charges into the cylinder. This includes a dual-fuel mechanism, a Lagrangian gaseous injection scheme, an improved spray particle breakup model, an advanced chemical kinetic reaction solver, as well as a complex n-heptane chemical kinetic reaction mechanism consisting of 35 species and 119 reversible reactions capable of describing both premixed and mixing controlled hydrogen/Diesel co-combustion at various fuel concentrations. The results showed that low levels of either hydrogen …

Development And Testing Of Nanostructured Materials For Extreme Environment Applications, Nanthakishore Makeswaran

Open Access Theses & Dissertations

Nanostructured materials have many potential applications in the fields of power generation and transportation technologies, particularly in the areas of gas sensing technology, industrial gas turbines and protective coatings. In the former case β-Ga2O3 represents a promising candidate due to its high degree of stability and functionality for oxygen sensing at higher temperatures (>700oC). In the latter case, the application of Y-Si-Fe compounds acting as environmental barrier coatings for gas turbine and aerospace engine applications to protect from corrosion effects has been demonstrated in recent years. In both cases, however, there is room for improvement whether it is in …

Low-Fidelity Method For Rapid Aerostructural Optimisation And Design-Space Exploration Of Planar Wings, Jeffrey D. Taylor, Doug F. Hunsaker

Mechanical and Aerospace Engineering Student Publications and Presentations

During early phases of wing design, analytic and low-fidelity methods are often used to identify promising design concepts. In many cases, solutions obtained using these methods provide intuition about the design space that is not easily obtained using higher-fidelity methods. This is especially true for aerostructural design. However, many analytic and low-fidelity aerostructural solutions are limited in application to wings with specific planforms and weight distributions. Here, a numerical method for minimising induced drag with structural constraints is presented that uses approximations that apply to unswept planar wings with arbitrary planforms and weight distributions. The method is applied to the …

Supplying Space: 3d Printing For Interplanetary Logistics, Jeffrey W. Rogers

Space Studies Student Publications

This case study examines 3-D printing as an effective solution to ensure just in time logistics capability for supporting a crewed colony on Mars. It explores the cost to weight benefits of an advanced shipment sent prior to the crewed mission to ensure on-planet production capacity on arrival and landing for sustained operations with limited resupply from Earth. In order to project a realistic and financially reasonable solution, a quantitative descriptive analysis method is utilized. Data was collected through text research and research tools provided from the United States Government (NASA) and private industry via internet sources. From correlated data, …

Nitinol Robotic Arm, Brandon Cousino, Connor Sweatt

Thinking Matters Student Research Symposium

The goal of our project is to create a remotely controlled robotic arm using a nickel-titanium alloy (Nitinol) that exhibits “shape memory” tendencies and a 9-lumen tube. The arm must be able to move in all for directions (forward, left, right, backwards) with the control of a joystick and return to an upright position upon halting user input (thus requiring a two-way shape memory ability). The final product must operate without any unwanted twisting of the arm, crosstalk between the different nitinol wires due to heating, and be easily manufacturable. Easy replacement of the arm from the main mechanism is …

Fear To Cooperation: A Brief History Of The Space Race, Dylan Clay

Undergraduate Research Conference at Missouri S&T

In 1957, the United States and the Soviet Union engaged in a space race that, ironically, resulted in joint United States-Soviet Union missions with the 1975 Apollo-Soyuz program. Starting in the 1950s, the Cold War between the two nations led to a feeling of unease from the world populace, especially with uncertainty surrounding the superpowers' capabilities. In the late 1950s, the United States feared that they would lose the race to space because of Sputnik's success, but American efforts led to far greater success with American Astronauts landing on the moon, effectively ending the race to space. With both nations …

White Paper Report: Needs In Space Education For The 21st Century—Research, Higher Education, Training And Public Policy, Randall Johnson, Joseph Pelton, Henry Hertzfeld, Don Flournoy, Hussein J. Hussein

Online Journal of Space Communication

May 2, 2003

A Forum Seeking Innovative Answers

• New Approaches to Higher Education and Training
• Distance Learning, Tele-education and the Internet
• Shared Research Facilities and New Approaches to Research
• Joint University Projects
• Multidisciplinary Needs and International Perspectives and Languages
• Space and Security Issues Related to Education
• How to Attract More Students to Higher Education in the Space Field
• How to Prepare Incoming Students More Effectively for College
• Wide Spread Survey on Space Education to Find Concerns and New Solutions

From The Industry: Yasunori Matogawa, Ph.D., Professor Of Space Communications At The Institute Of Space And Astronautical Science, Yasunori Matogawa

Online Journal of Space Communication

Dr. Yasunori Matogawa is Professor at the Institute of Space and Astronautical Science directly reporting to the Ministry of Education, Science, Culture, Sports and Technology. He is also in charge of supervising Kagoshima Space Center in Kyushu as Director General. Widely considered to be the man of space education in Japan, Dr. Matogawa is the President for the Japan Society for Aeronautical and Space Sciences. Internationally, he is well-known as the Chairman of the International Astronautical Federation. The interview was conducted at Sophia University, Japan with the assistance of Dr. Tsutomu Kanayama (Email: [email protected]).

Students Interested In Satellite Communications Can Gain An Edge In The Job Market By Studying Science And Theory, Ben Chang

Online Journal of Space Communication

The mind has an extraordinary ability to see things that are hoped for, Arthur C. Clarke said in 1973. Years later he noted that it cost about $100, in terms of kilowatt-hours, to go to the moon, "whereas it costs about a billion dollars the way we've done it."

These two quotes from the grandfather of satellite communications and author of 2001: A SPACE ODYSSEY point to one of the primary qualities INTELSAT looks for in filling engineering positions: the ability to apply book knowledge to the practical aspects of satellite communications.

Model Curricula: University Of Texas Medical Branch

Online Journal of Space Communication

University of Texas Medical Branch UTMB/NASA Aerospace Medicine Residency

Model Curricula: University Of Oklahoma

Online Journal of Space Communication

University of Oklahoma Aerospace Engineering