Experimental Heat Transfer Coefficients And Friction Factors In A Rib-Roughened Leading-Edge Cooling Cavity Of A Gas Turbine Airfoil, Peter Jacob Hagan
Mechanical Engineering Master's Theses
A gas turbine airfoil contains multiple coolant passageways. These passages usually have rib roughened wall surfaces in order to increase the heat transfer from the blade to the cooling air. Auxiliary power and compressed air is very valuable in a gas turbine, therefore low pumping power requirements are crucial. The thermal performance of three different coolant channel geometries with three different rib sizes was investigated. Heat transfer calculations were performed for Reynolds numbers ranging from 6,000 to 40,000. The performance characteristics were calculated through the use of the convective heat transfer coefficient and the friction factor. In this ...
Solar Ballooning: A Low-Cost Alternative To Helium Balloons For Small Spacecraft Testing, John Nordlie, Jeremy Straub, Chris Theisen, Ronald Marsh
Helium-filled latex weather balloons have been utilized to carry small satellite prototypes and subsystems into the stratosphere to allow testing in a “near space” environment. This provides a variety of environmental factors similar to the space environment, such as a rarified atmosphere, increased thermal stress, increased solar radiation, the necessity of remote command and control, tracking, and telemetering of data. While this method of flight testing has been well-proven, a recent spike in the price of helium has driven the cost of such test programs to much higher levels. In this poster, an alternative technology to provide the flight mechanism ...
Openorbiter Small Spacecraft Development Program Educational Benefits, 2014 SelectedWorks
Openorbiter Small Spacecraft Development Program Educational Benefits, Jeremy Straub
No abstract provided.
The Design Of The Open Prototype For Educational Nanosats, 2014 SelectedWorks
The Design Of The Open Prototype For Educational Nanosats, Jeremy Straub
No abstract provided.
Work On A Software Defined Radio (Sdr) For A Cubesat-Class Spacecraft, 2013 SelectedWorks
Work On A Software Defined Radio (Sdr) For A Cubesat-Class Spacecraft, Michael Wegerson, Jeremy Straub, Sima Noghanian
A Software Defined Radio (SDR) will be used for OpenOrbit-er satellite to ground communications. The use of SDR al-lows for a smaller, more versatile radio then what a stand-ard hardware radio can provide; perfect for the unpredicta-ble environment Open Orbiter will be exposed to. Current implementation uses a simple $20 USB TV decoder for the receiver and the open-source program GNU Radio for soft-ware decoding. Broadband FM transmissions have been re-ceived and decoded successfully and on-going experimen-tation for receiving satellite communications are yielding promising results.
Software For Openorbiter, 2013 SelectedWorks
Software For Openorbiter, Christoffer Korvald, Jeremy Straub, Scott Kerlin, Ronald Marsh
The software development effort for the OpenOrbiter project consists of four teams: operating software development, payload software development, ground station software development and testing. These teams are designing and developing the software required to create a turn-key spacecraft design1 which can be produced at a price point of under USD $5,000 by faculty, students and researchers world-wide2. Through this process, students are gaining valuable real-world experience3,4 in areas of indicated interest5. Each team is headed by a team lead who is responsible for conducting weekly meetings and organizing the activities of the team. During the Fall, 2013 semester ...
Openorbiter Ground Station Software, 2013 SelectedWorks
Openorbiter Ground Station Software, Alexander Lewis, Jacob Huhn, Jeremy Straub, Travis Desell, Scott Kerlin
OpenOrbiter is a student project at the University of North Dakota to design and build a low cost1 and open-hardware / open-source software CubeSat2. The Ground Station is the user interface for operators of the satellite. The ground station software must manage spacecraft communications, track its orbital location , manage task assignment, provide security and retrieve the data from the spacecraft. This will be presented via a graphical user interface that allows a user to easily perform these tasks.
Openorbiter Combined Software Work Breakdown Structure, 2013 SelectedWorks
Openorbiter Combined Software Work Breakdown Structure, Jeremy Straub, Timothy Whitney, Tyler Leben, Kelton Karboviak, Zach Maguire, Christoffer Korvald, Scott Kerlin
As part of CSCI 297, students created work breakdown structures for different areas of the OpenOrbiter project’s software groups. In CSCI 207, they learned about all aspects of project management via experiential learning. They acted as project management ‘consultants’ to the OpenOrbiter software teams. To facilitate the creation of the work breakdown structures, they interviewed team leads, attended team meetings and discussed current progress and needs with members of the teams. In some cases, they collected additional information from reference sources and/or spoke with other teams which would be the ‘customer’ of a particular area of the software ...
Scheduling For A Small Satellite For Remote Sensed Data Collection, 2013 SelectedWorks
Scheduling For A Small Satellite For Remote Sensed Data Collection, Donovan Torgerson, Christoffer Korvalnd, Jeremy Straub, Ronald Marsh
Small satellites, such as CubeSats, serve as excellent platforms for the collection of data that can be supplied to a geographic information system. To serve this need, they require a robust and lightweight task scheduler due to their limited onboard power production capabilities as well as internal space restrictions. Because of these constraints, schedules must be optimized; however, the scheduling optimization process must be performed using limited processing (CPU) power.
Several considerations must be taken into account in order to make a scheduler for these systems. This poster highlights requirements such as inter-dependency of onboard systems, and limited windows of ...
Educational Outcomes From The Openorbiter Small Spacecraft Development Program, 2013 SelectedWorks
Educational Outcomes From The Openorbiter Small Spacecraft Development Program, Jeremy Straub
The OpenOrbiter program  is developing a low-cost framework for the creation of space-craft by researchers and educators worldwide . In addition to the technical objectives, ed-ucational assessment [2, 3] has also been a key focus. Students working on development of the spacecraft  were asked what types of benefits they sought from their participation . The assessment of the attainment of these benefits is ongoing, in conjunction with continued development in pursuit of the crea-tion of a set of designs that can be used to build a spacecraft with a cost of under $5,000  .
Roofsat: Teaching Students Skills For Software Development For Gis Data Collection And Other Activities, Jeremy Straub, Ronald Marsh, Donovan Torgerson, Christoffer Korvald
Small Spacecraft provide an excellent platform for the collection of geospatial data. In order to enable the low-cost creation of small remote sensing space-craft in a university environment, a training pathway for students is required. The Realistic Operational Ob-ject for Facilitating Software Assessment and Testing (RoofSat) serves to provide students with experience developing software for a small satellite platform typi-cal of those used for remote sensing missions. It al-lows software to be tested with hardware that re-sponds in a similar manner to that found on the satel-lite for a fraction of the cost of development. This poster details the goals ...
Testing And Integration Team Project Management, 2013 SelectedWorks
Testing And Integration Team Project Management, Tyler Leben, Jeremy Straub, Scott Kerlin
The Testing and Integration Team plays an integral role in the development of the open source CubeSat known as Open Orbiter. Like any project, the Testing Team’s project can benefit from structure and management to effectively utilize it’s time and resources. CSCI 297 teaches the skills needed to turn a good idea into successful endeavor. By applying skills such as effective planning, setting milestones, dealing with changes and supervising to an actual project, Open Orbiter has transformed from a pipe dream to a real, obtainable goal. Doing this has turned learning about project management into more that just ...
Ground Station Software Team Project Management, 2013 SelectedWorks
Ground Station Software Team Project Management, Zach Maguire, Marshall Mattingly, Christoffer Korvald, Jeremy Straub, Scott Kerlin
In CSCI 297 class we partake in learning the roles of software team leads and developers. With hands on activities that get us involved in what a real manager of a software team may do such as: defining a project, planning a project, developing a work breakdown structure, estimating the work, developing a project schedule, etc. This work is performed in the context of the OpenOrbiter project which seeks to build a low-cost spacecraft1 that can be produced with a parts budget of approxi-mately $5,0002 by schools worldwide. The ground station software team’s purpose within Open Orbiter project ...
Payload Software Design And Development For A Remote Sensing Small Spacecraft, 2013 SelectedWorks
Payload Software Design And Development For A Remote Sensing Small Spacecraft, Kyle Goehner, Christoffer Korvald, Jeremy Straub, Ronald Marsh
Scheduling for a Small Satellite for Remote Sensed Data Collection
Project Management For The Openorbiter Operating Software Team, 2013 SelectedWorks
Project Management For The Openorbiter Operating Software Team, Kelton Karboviak, Dayln Limesand, Michael Hlas, Eric Berg, Christoffer Korvald, Jeremy Straub, Ronald Marsh, Scott Kerlin
OpenOrbiter is producing a 1-U CubeSat spacecraft1 to facilitate the construction of low-cost2 spacecraft by others in the future. The Operating Software team is in charge of designing and creating the software that controls most of the CubeSat’s operations such as image capturing, storage management, and temperature sensing. The project management deliverables that we have worked on as a team are the Project Definition, Work Breakdown Structure, and the Project Schedule. The Project Definition defines exactly what our project team will be developing including, but not limited to, what the team is in charge of developing, what its not ...
Openorbiter Payload Software, 2013 SelectedWorks
Openorbiter Payload Software, Tim Whitney, Kyle Goehner, Jeremy Straub, Scott Kerlin
The Payload Software team is responsible for developing the image processing and task decomposition systems on the Open Orbiter satellite1. The image processing software performs operations to enhance the quality of the images collected by the onboard camera, specifically, mosaicking, which takes multiple images and stitches them together to make a larger image and super resolution, which takes multiple low resolution images of the same area to produce a higher resolution image2,3,4. The task decomposition part of the system decomposes tasks defined by the user into jobs that then get sent to the operating system to be performed ...
Experimental Study On The Effect Of Air Flow On Soap Bubble Formation, 2013 University of Nebraska - Lincoln
Experimental Study On The Effect Of Air Flow On Soap Bubble Formation, John M. Davidson
Mechanical (and Materials) Engineering -- Dissertations, Theses, and Student Research
Soap bubbles are a common interfacial fluid dynamics phenomenon having applications such as buoyant hollow spherical fillers and flow visualization of large scale airflows. In contrast to the dynamics of liquid drops in gas and gas bubbles in liquid, the dynamics of soap bubbles has not been well documented, possibly because soap bubbles have gas-liquid-gas interfaces. Having the thin-liquid-film interface seems to alter the characteristics of the bubble/drop creation process. Thus, the main objective of this study is to experimentally examine how airflow develops and interacts with the soap liquid film as the film stretches and finally collapses to ...
Adaptive Control Techniques For Transition-To-Hover Flight Of Fixed-Wing Uavs, 2013 California Polytechnic State University
Adaptive Control Techniques For Transition-To-Hover Flight Of Fixed-Wing Uavs, Brian Decimo Marchini
Master's Theses and Project Reports
Fixed-wing unmanned aerial vehicles (UAVs) with the ability to hover combine the speed and endurance of traditional fixed-wing fight with the stable hovering and vertical takeoff and landing (VTOL) capabilities of helicopters and quadrotors. This combination of abilities can provide strategic advantages for UAV operators, especially when operating in urban environments where the airspace may be crowded with obstacles. Traditionally, fixed-wing UAVs with hovering capabilities had to be custom designed for specific payloads and missions, often requiring custom autopilots and unconventional airframe configurations. With recent government spending cuts, UAV operators like the military and law enforcement agencies have been urging ...
Pyrolysis Of Acrylonitrile-Butadiene-Styrene (Abs) Under High Heat Flux Conditions, 2013 Utah State University
Pyrolysis Of Acrylonitrile-Butadiene-Styrene (Abs) Under High Heat Flux Conditions, James R. Wilson
All Graduate Plan B and other Reports
Acrylonitrile-butadiene-styrene (ABS) is a common industrial plastic that is widely used for structural and piping applications. Additionally, within the past decade ABS has become the most popular material used in a type of rapid prototyping known as fused- deposition modeling (FDM). Within the past three years, ABS plastic blends have also been investigated as a potential fuel for hybrid- and solid-propelled rocket systems, exhibiting promising results. Because the use of ABS as a rocket propellant is very recent, a pyrolysis database, describing how ABS will burn, at the temperatures and heating rates experienced by rocket systems does not exist. Previous ...
Hollow Plume Mitigation Of A High-Efficiency Multistage Plasma Thruster, 2013 California Polytechnic State University
Hollow Plume Mitigation Of A High-Efficiency Multistage Plasma Thruster, Scott Alan Mcgrail
Master's Theses and Project Reports
Since 2000, a relatively new electric thruster concept has been in research, development, and production at Thales Electron Devices in Germany. This High Efficiency Multistage Plasma Thruster, or HEMPT, has promising lifetime capabilities due to its plasma confinement system. However, the permanent magnet system that offers this and other benefits also creates a hollow plume, where ions are accelerated at angles rather than up the thruster centerline, causing a dip in ion current along the centerline. A laboratory model, built at JPL, was run at Cal Poly to characterize this plume shape and implement a shield to restore a conical ...