Experimental Investigation Of Various Hydrogen Knock Limit Extension Strategies On A Hydrogen-Gasoline Dual Fuel Spark Ignition Engine,
2024
United Arab Emirates University
Experimental Investigation Of Various Hydrogen Knock Limit Extension Strategies On A Hydrogen-Gasoline Dual Fuel Spark Ignition Engine, Sanad Puthan Purayil
Thesis/ Dissertation Defenses
Hydrogen is a clean and carbon free substitute with the ability to significantly cut down the harmful emissions while enhancing the energy efficiency of internal combustion engines (ICE) typically powered by conventional fossil fuels. Hydrogen is the most abundant element which can be easily obtained from sources like water and biomass. The wide flammability range and high laminar flame velocity outstands hydrogen from other fuels. However, hydrogen fueled engines are more prone to abnormal combustion like knock and backfire due to its low ignition energy and high adiabatic flame temperature. To avoid backfire, several well-developed approaches have been reported. Unlike …
Microgravity Aeroponics System Project,
2024
Morehead State University
Microgravity Aeroponics System Project, Andrew W. Diddle
Morehead State Theses and Dissertations
A thesis presented to the faculty of the College of Science and Engineering at Morehead State University in partial fulfillment of the requirements for the degree Master of Science by Andrew W. Diddle on April 22, 2024.
Martian Atmospheric Rover Simulation (M.A.R.S.),
2024
Florida Institute of Technology
Martian Atmospheric Rover Simulation (M.A.R.S.), Matt Berard, Shelby Beddard, Alexander Brunette, Emma Conti, Collin Duke, Delaney Novak, Keelin Weaver
Aerospace, Physics, and Space Science Student Publications
While rovers have been used by various agencies to explore Mars, their travel is limited by terrain obstacles, which may prevent mission completion. Creating a vehicle equipped with both driving and flight capabilities would allow greater range of motion on extraterrestrial planets. Integrating the technology for both transportation modes into one rover allows for efficiency and advancements in technological and planetary research.
Ferroresonance In Three-Phase Electrical Networks,
2024
Tashkent State Technical University, Tashkent city, Republic of Uzbekistan, PhD, Professor, [email protected], https://orcid org/0000-0002-1528-0098.
Ferroresonance In Three-Phase Electrical Networks, Shavkat Ernstovich Begmatov
Technical science and innovation
Possible modes of ferroresonance in three-phase electric networks and analysis of substitution schemes where ferroresonance voltage increase is observed are considered. The most complete magnetization curve of the transformer core and the analysis of the generalized equivalent substitution scheme are presented, as a result of which more accurate formulas for determining the values of equivalent parameters of the electrical network and voltage transformer in ferroresonance mode are obtained. Factor of ferroresonance voltage increase is introduced, which determines ratio between amplitude values of transformer phase voltage and mains voltage. The method of determination of boundary conditions of steady ferroresonance voltage increase …
Main Prospects Of Natural Gas Purification Technologies From Acidic Compounds,
2024
Tashkent Institute of Chemical Technology, Tashkent city, Republic of Uzbekistan, PhD, Associate Professor, [email protected]; https://orcid.org/0000-0002-6865-1358;
Main Prospects Of Natural Gas Purification Technologies From Acidic Compounds, Oybek Yusupdjanovich Aripdjanov, Diyora Zokhid Qizi Khayrullaeva, Jonibek Avazek Ogli Abdumuminov
Technical science and innovation
The article discusses the main prospects for the technology of purifying natural gas from acidic components and the problems of ensuring the purity of oil and gas products in accordance with state standards. An increase in the degree of purification from H2S, CO2, elemental sulfur, carbonyl sulfide, ethyl mercaptans (thiols), methyl mercaptan, carbon disulfide, sulfides, disulfides (dithioethers), thiophene, sulfoxides and sulfones is considered. Also, the physicochemical properties of the absorbent for the purification of sulfur compounds (generated during natural gas processing) are studied. Based on the study of various absorbents (ethanolamine (EA), methylethanolamine (MEA), diethanolamine (DEA), …
Electric Ducted Fan Lander,
2024
Western Michigan University
Electric Ducted Fan Lander, Maggie Waechter
Honors Theses
This report, and corresponding project, addresses the fact that there are not many student experiments with controlling real spacecrafts due to the scarceness of the craft, cost, risk, and finite fuel supply. This project demonstrates the possibility of a classroom substitute for students to understand how landers would operate on planetary bodies. In order to achieve flight from the drone, there were two separate designs produced, the electrical and structural system, that were integrated together to form a full prototype. The performance of the electric ducted fans (EDFs) as well as the batteries were tested to ensure that the components …
Design Of Telemetry And Remote-Control System For Electric Propulsion Testing,
2024
Western Michigan University
Design Of Telemetry And Remote-Control System For Electric Propulsion Testing, Logan Alvesteffer
Honors Theses
Ground testing of electric propulsion (EP) devices occurs inside vacuum chambers and is monitored using high-frequency and low-frequency telemetry systems. These systems provide critical operational information about the device’s performance by monitoring values such as voltage, current, gas flow rates, and chamber pressures. Ground facility telemetry systems can operate as integrated control and safety architecture while testing EP devices. EP testing at Western Michigan University (WMU) is located within the Aerospace Laboratory for Plasma Experiments (ALPE). The Cold plasma Experimental Research Station (CEReS) is outfitted with CTI-250F and CTI-10 cryogenic pumps for a combined pumping capacity of 5,200L/s-air. CEReS facilitates …
Integrated Organizational Machine Learning For Aviation Flight Data,
2024
Kansas State University
Integrated Organizational Machine Learning For Aviation Flight Data, Michael J. Pritchard, Austin T. Walden, Paul J. Thomas
Journal of Aviation/Aerospace Education & Research
Increased availability of data and computing power has allowed organizations to apply machine learning techniques to various fleet monitoring activities. Additionally, our ability to acquire aircraft data has increased due to the miniaturization of small form factor computing machines. Aircraft data collection processes contain many data features in the form of multivariate time series (continuous, discrete, categorical, etc.) which can be used to train machine learning models. Yet, three major challenges still face many flight organizations: 1) integration and automation of data collection frameworks, 2) data cleanup and preparation, and 3) developing an embedded machine learning framework. Data cleanup and …
Interpersonal Skills In A Sociotechnical System: A Training Gap In Flight Decks,
2024
University of Washington
Interpersonal Skills In A Sociotechnical System: A Training Gap In Flight Decks, Kimberly Perkins, Sourojit Ghosh, Crystal Hall
Journal of Aviation/Aerospace Education & Research
This research analyzed the perceptions of interpersonal skills on established aviation safety models, Crew Resource Management (CRM), and Threat and Error Management (TEM) using feedback from industry pilots. The flight deck is a sociotechnical system where much research has focused on the technical aspect, whereas we spotlight its socio aspect. The aviation industry must invest in training pilots on interpersonal skills to enhance safety through increased efficacy of safety models integrated throughout existing training programs. A 34-question survey was disseminated across both commercial and business aviation pilots (N=822). We explored three research questions regarding pilots’ perceived training on interpersonal skills …
Analysis, Design, And Validation Of The Structural System Of Alainsat-1 Cubesat,
2024
United Arab Emirates University
Analysis, Design, And Validation Of The Structural System Of Alainsat-1 Cubesat, Abdalla Saad Elshaal
Thesis/ Dissertation Defenses
This thesis presents the process of conducting structural analysis on AlAinSat-1 CubeSat through numerical solutions using Siemens NX. AlAinSat-1 is a 3U remote-sensing CubeSat equipped with two Earth observation payloads and is scheduled for launch using SpaceX's Falcon 9 rocket. To ensure the mission's success and its ability to endure the launch environment, several scenarios must be analyzed. For the AlAinSat-1 model, the Finite Element Analysis (FEA) method is employed, covering four types of structural analyses: modal, quasi-static, buckling, and random vibration analyses. The workflow cycle includes idealization, meshing, assembly, applying connections and boundary conditions, and finally, running simulations using …
Synthesis And Structure-Property Relationships Of Sustainable Nanostructured Materials Towards Energy And Environment Applications,
2024
United Arab Emirates University
Synthesis And Structure-Property Relationships Of Sustainable Nanostructured Materials Towards Energy And Environment Applications, Nizamudeen Alungal Cherupurakal
Thesis/ Dissertation Defenses
This doctoral research aims to advance clean energy technologies by developing specialized nanostructured materials. The study covers significant research themes, each forming separate sections in the thesis, explaining the important role of nanostructures in enhancing the efficiency and sustainability of energy devices and photocatalytic technologies. The enduring effort toward stabilizing and improving the efficiency of dye-sensitized solar cells (DSSCs) has stirred the solar research community to follow innovative approaches. The primary objective of the research is centered on electrode materials design, which improves photoanodes' light-harvesting efficiency (LHE). To improve the Photoanode of DSSCs, a Metal-Organic Framework (MOF) derived porous photoanodes …
Friction Stir Welding Of Tube-To-Tubesheet And Spot Joints For Virgin And Recycled Thermoplastic Materials.,
2024
United Arab Emirates University
Friction Stir Welding Of Tube-To-Tubesheet And Spot Joints For Virgin And Recycled Thermoplastic Materials., Syed Haris Iftikhar
Thesis/ Dissertation Defenses
Thermoplastic materials are becoming popular, due to their chemically inert and anti-fouling properties, for use in industrial heat exchanger applications involving heating/cooling of highly reactive fluids like acids. A novel nonconventional joining framework, based on the friction stir welding (FSW) technique, is developed to create high-quality thermoplastic tube-to-tubesheet joints (TTJs). The proposed technique has applications in the thermoplastic shell-andtube heat exchanger and piping industries (as flange-to-pipe joints). The primary objective is to study the feasibility of the FSW technique for developing thermoplastic TTJs, followed by optimization of the process parameters and detailed material characterizations. This work used workpieces (tube, tubesheet) …
Predictive Ai Applications For Sar Cases In The Us Coast Guard,
2024
Old Dominion University
Predictive Ai Applications For Sar Cases In The Us Coast Guard, Joshua Nelson
Cybersecurity Undergraduate Research Showcase
This paper explores the potential integration of predictive analytics AI into the United States Coast Guard's (USCG) Search and Rescue Optimal Planning System (SAROPS) for deep sea and nearshore search and rescue (SAR) operations. It begins by elucidating the concept of predictive analytics AI and its relevance in military applications, particularly in enhancing SAR procedures. The current state of SAROPS and its challenges, including complexity and accuracy issues, are outlined. By integrating predictive analytics AI into SAROPS, the paper argues for streamlined operations, reduced training burdens, and improved accuracy in locating drowning personnel. Drawing on insights from military AI applications …
Offshore Wind Farm Pycnocline Mixing From Varied Flow Types,
2024
Utah State University
Offshore Wind Farm Pycnocline Mixing From Varied Flow Types, Laura Lundahl
Student Research Symposium
As the demand for sustainable low carbon energy grows, offshore wind farms (OWFs) are becoming increasingly popular and are being pushed into stratified regions where a pycnocline exists (Figure 1). These wind farms may cause turbulent mixing of the pycnocline, which will harm the phytoplankton ecosystem. This project quantifies pycnocline mixing to gain knowledge of effective methods for mitigating harmful effects.
Uncertainty Quantification Of Thermal Capacitance Calorimeter For High-Enthalpy Flows,
2024
Missouri University of Science and Technology
Uncertainty Quantification Of Thermal Capacitance Calorimeter For High-Enthalpy Flows, Logan Banker, Davide Vigano
Undergraduate Research Conference at Missouri S&T
Thermal capacitance calorimeters are the standard instrument used to measure cold wall heat fluxes in high-enthalpy flows that simulates hypersonic flight conditions. These instruments play a fundamental role in the development and testing of Thermal Protection Systems for space re-entry conditions. However, despite their rugged and simple design, they are affected by large uncertainty errors. These have been estimated in literature at 15%. Despite their importance, and large errors, no proper uncertainty analysis has been performed. Uncertainty analysis is difficult due to the complex physics of the environment these calorimeters have to operate into.
Supersonic Wind Tunnel Modeling,
2024
Missouri University of Science and Technology
Supersonic Wind Tunnel Modeling, Noah Cain, Davide Vigano
Undergraduate Research Conference at Missouri S&T
Supersonic wind tunnels are essential for high-speed aerodynamics research, allowing studies ranging from fundamental flow physics to the advancement of supersonic transport. This work presents a physics-based model developed for the Missouri S& T supersonic wind tunnel, a blow-down facility employing a converging-diverging nozzle to achieve high-speed flow. The model accounts for real gas effects, including Joule-Thomson phenomena, as well as predictions of pressure losses and heat transfer. Implemented in Matlab, the model's accuracy was validated through comparison with experimental measurements, demonstrating excellent agreement. This research contributes to the reliable prediction of supersonic wind tunnel performance, thus advancing the understanding …
Organic Contaminant Effects On The Mac Of Water,
2024
Missouri University of Science and Technology
Organic Contaminant Effects On The Mac Of Water, Jordan Hartfield
Undergraduate Research Conference at Missouri S&T
The evaporation or condensation rate of a liquid surface is directly proportional to the mass accommodation coefficient (MAC). Since the MAC is difficult, if not impossible, to experimentally measure, molecular dynamics (MD) simulations have been employed to study it. Experimental studies have shown that airborne hydrocarbon contaminants from a variety of sources can adsorb on liquid surfaces and significantly alter the surface properties. We have therefore studied the effects of organic surface contaminants, which are immiscible with water, on the MAC using equilibrium and nonequilibrium MD simulations. Our equilibrium MD simulation results show that the MAC decreases linearly with increases …
Development Of A Force Perturbation Handle For Physical Interaction Research In Humans,
2024
Missouri University of Science and Technology
Development Of A Force Perturbation Handle For Physical Interaction Research In Humans, Henry Tien, Riley Still, Yun Seong Song
Undergraduate Research Conference at Missouri S&T
The vision of developing more advanced robots that physically interact with people begins with the study of how people interact with each other. Even the simplest interactions between humans, such as shaking hands, provides tremendous challenges for current robots and minimal research has been conducted on the inner workings of these interactions. Understanding the process and mechanics behind effective and intuitive physical human-human interaction (pHHI) will yield meaningful insight into designing robots capable of assisting the elderly, operating side by side with workers, or even dancing with people. To study this process, a custom Force Perturbation Handle (FPH) was developed, …
Using Efficient Global Optimization With Cfd For Aerodynamic Optimization,
2024
Missouri University of Science and Technology
Using Efficient Global Optimization With Cfd For Aerodynamic Optimization, Aaron Spillars, Nathan Roberts, Xiaoping Du
Undergraduate Research Conference at Missouri S&T
Machine learning and optimization are the stepping blocks in broad engineering areas, such as computational fluid dynamics (CFO) and CFO-based design optimization. Using the CFO-based optimization framework, MACH-Aero, we were able to use the SLSQP optimizer and compared the results with a reference case completed by the SNOPT optimizer. Results verified that our SLSQP optimizer was working properly. The solver created showed that our objective function had a difference in magnitude of 0.000019 allowing us to conclude that our solver was working as intended. However, there were several failed attempts before reaching a successful run that gave us a satisfactory …
Simulating Low Gravity Particle-Laden Flow,
2024
Utah State University
Simulating Low Gravity Particle-Laden Flow, Ryan Lewis
Student Research Symposium
No abstract provided.
