Index Catalog // ScholarsArchive@OSU

An advanced modeling system for optimization of wind farm layout and wind turbine sizing using a multi-level extended pattern search algorithm

Creator:: DuPont, Bryony, Cagan, Jonathan, and Moriarty, Patrick
Abstract:: This paper presents a system of modeling advances that can be applied in the computational optimization of wind plants. These modeling advances include accurate cost and power modeling, partial wake interaction, and the effects of varying atmospheric stability. To validate the use of this advanced modeling system, it is employed...
Resource Type:: Article
Full Text:: , Patrick Moriarty c a School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State

Advancing Wind Systems Design through Optimization and Improved Modeling

Creator:: Miller, Annalise M.
Abstract:: Wind energy plays an important and growing role in the US energy profile. While other countries have expanded their wind industries into offshore development, large investment costs have hindered progress in the US offshore market despite the larger and more consistent resource available offshore. In this research, I explore the...
Resource Type:: Masters Thesis
Full Text:: operations and main- tenance (O&M) costs that can be prohibitive. Therefore, reducing the cost of a floating

From running birds to walking robots : optimization as a unifying framework for dynamic bipedal locomotion

Creator:: Hubicki, Christian M.
Abstract:: Bipedal locomotion is a complex phenomenon to understand and control, making it difficult for legged robots to achieve the speed, agility, efficiency, and robustness of their animal counterparts. This thesis argues for the use of numerical optimization to investigate and implement bipedal control as it applies to biology, dynamical models,...
Resource Type:: Dissertation
Full Text:: Unifying Framework for Dynamic Bipedal Locomotion AN ABSTRACT OF THE THESIS OF Christian M. Hubicki

Analysis of the Effects of Combustion Products on Forced Ignition and Turbulent Flame Propagation

Creator:: Bonebrake, Jonathan M.
Abstract:: Practical combustion devices frequently rely upon forced ignition of turbulent fuel/oxidizer mixtures that also contain the product species of combustion. Examples of this include engines that use exhaust gas recirculation (EGR), inter-turbine burners in aircraft engines, and other systems the utilize staged combustion. In this work, the effects of major...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Jonathan M

Improving Water, Sanitation and Biogas Access in Resource-Stressed Environments : Methodologies and Case Study Analyses of the Primary Resources at Matema Beach High School

Creator:: Richardson, Megan M.
Abstract:: Education as a right has taken off internationally with expanded national policies in recent years. Across Africa over 80% of countries have abolished tuition fees for primary education and several have made the leap to free secondary education as well. With decreased financial barriers keeping kids out of the classroom,...
Resource Type:: Masters Thesis
Full Text:: the water catchment and the school’s campus. Elevation Head (m) Total Pipe Length (m) 82 1025

Mechanical Design for Robot Locomotion

Creator:: Abate, Andrew M.
Abstract:: Robotic limbs have been shown to enable mobility in unstructured, real-world terrain; they allow robots to step around cluttered environments, scramble up hills, carry heavy loads, and even perform acrobatics. However, mechanical limbs cannot operate as a means for such dynamic locomotion if they are simply treated as general articulated...
Resource Type:: Dissertation
Full Text:: THE DISSERTATION OF Andrew M. Abate for the degree of Doctor of Philosophy in Robotics presented on

Gathering information rich customer needs for inclusive product design

Creator:: Armstrong, Jessica
Abstract:: This work explores a framework for the gathering and analysis of information rich customer needs, with the goal of informing inclusive product design practice. The goal is to be able to provide information and experience to designers so that they can better understand the needs of exceptional users and include...
Resource Type:: Dissertation

Numerical simulation of micro/mini-channel based methane-steam reformer

Creator:: Peterson, Daniel Alan
Abstract:: Numerical modeling of methane-steam reforming is performed in a micro/mini-channel with heat input through catalytic channel walls. The low-Mach number, variable density Navier-Stokes equations together with multicomponent reactions are solved using a parallel numerical framework. Methane-steam reforming is modeled by three reduced-order reactions occurring on the reactor walls. The surface...
Resource Type:: Masters Thesis
Full Text:: velocity (U) is given in units of [m/s] and the y location in [µm

A Theoretical Framework to Capture Stakeholders' Perspectives for the Design of Collaborative Communication Structures for Specialized Organizations

Creator:: Chongvilaiwan, Tanida
Abstract:: Small business energy analysts often specialize in one aspect of the business. This specialized focus is done by necessity due to scarcity of resources and to maintain a proprietary market niche. However, this specialized focus results in a growth inhibitor due to their lack of ability to address all the...
Resource Type:: Masters Thesis
Full Text:: & 2 Moriarty, 1998). However, producing a clear definition, completing a project at the

Floating Offshore Wind Array Systems Optimization off the US West Coast using an Extended Pattern Search Algorithm

Creator:: Forinash, Caitlin P.
Abstract:: The large wind resource off the United States West Coast has the potential to generate wind power for millions of homes, yet the high cost of energy for offshore wind power compared to traditional sources has slowed the development of offshore wind farms in the US. The four studies presented...
Resource Type:: Masters Thesis
Full Text:: ......................................................... 33 Fig. 9: Initial layout for a wind farm with side lengths of 4000 m

Evaluating Stiffness Metrics for Predicting the Cost of Chemical Kinetics Integration

Creator:: Alferman, Andrew Thomas
Abstract:: Simulations of combustion and reacting flows often encounter stiffness in the equations governing chemical kinetics. Explicit solvers for these ordinary differential equations offer low computational expense, but typically cannot efficiently handle stiff systems. In contrast, implicit methods demand greater expense but offer unconditional stability—as a result, most reactive-flow solvers rely...
Resource Type:: Masters Thesis
Full Text:: derivative of the function y(xn). Additionally, the matrix norm ‖M‖ of matrix M 14 with i columns and j

Advanced Computational Modeling Methods for Floating Offshore Wind Systems

Creator:: Devin, Michael C.
Abstract:: Floating offshore wind energy is anticipated to become a competitive source of renewable energy by the late 2020s, but the industry must reduce costs and uncertainties associated with the technology to do so. Identifying solutions to these problems frequently relies on computational modeling, which presents technical shortcomings limiting the versatility...
Resource Type:: Masters Thesis
Full Text:: Overall Layout Horizontal distance between turbines 1,451 m Radial distance from fairleads to anchors 797

The impacts of ionization chemistry on hydrocarbon detonation

Creator:: Zaiger, Matthew F.
Abstract:: As carbon emissions are negatively impacting ecosystems across the globe, researchers are in a race against time to provide cleaner and more eÿcient power. Detonation engines can help meet the increasing demands for cleaner and more eÿcient power generation by providing an alternative means to use oxy-fuel combustion for carbon...
Resource Type:: Masters Thesis
Full Text:: - fuel detonation experiments showed that the electrical conductivity ranges just 10-3– 10-1S/m [8].Such

A framework for assessing and improving the resilience of complex engineered systems during the early design process

Creator:: Mehrpouyan, Hoda
Abstract:: As modern systems continue to increase in size and complexity, they pose significant safety and risk management challenges. System engineers and much of the government research efforts are focused on understanding the attributes and characteristics that emerge from the interactions of components and subsystems. As a result, the objective of...
Resource Type:: Dissertation
Full Text:: ⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎨ requirements. {Sk}k∈[1..m] ⇒ Ri Ri satisfied by sub-set of ⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎩ sub-systems or components. The

Reducing Biogeochemical Models with an Automated Reduction Method

Creator:: Klee, Emily
Abstract:: Modeling elementary chemical reactions in ocean ﬂuid dynamics simulations requires signiﬁcant computing resources, which can be diminished with model reduction techniques. Submesoscale ocean turbulence and biogeochemical reactions in the ocean occur on approximately the same time scale, 105 seconds. This similarity in time scales indicates a strong coupling between these...
Resource Type:: Masters Thesis
Full Text:: Langmuir turbulence and submesocale eddies, which span a spatial scale of 5 m to 20 km. This study did not

Applying hierarchical and adaptive control to coordinating simple robots

Creator:: Knudson, Matthew D.
Abstract:: Coordinating multiple robots to achieve a complex task requires solving two distinct control problems: the high-level control problem of ensuring that each robot aims to perform a useful task (e.g., coordination) and the low-level control problem of ensuring that each robot actually performs the correct actions to achieve its task...
Resource Type:: Masters Thesis

Offshore renewable energy : an exploration of techno-economic feasibility and reliability through a computational optimization perspective

Creator:: Clark, Caitlyn E.
Abstract:: Offshore renewable energy (ORE) has the potential to be a significant source of future global electricity production, reduce carbon emissions, decrease dependence on energy importation, and stimulate economic growth in coastal and remote areas. The availability and abundance of ORE, paired with growing coastal population centers, position offshore wind, wave,...
Resource Type:: Masters Thesis
Full Text:: ................................................................................................................ 34! Table 6: O&M Costs

Risk- and Reliability-Based Design Optimization in Offshore Renewable Energy Systems

Creator:: Clark, Caitlyn E.
Abstract:: Offshore wind and wave energy have the potential to be significant sources of future global electricity production, reduce carbon emissions, decrease dependence on energy importation, and stimulate economic growth in coastal and remote areas. Fixed-foundation and floating offshore wind and wave energy technologies are at different stages of development, but...
Resource Type:: Dissertation
Full Text:: 30 m water depths occurs just below mudline [123]. The multiple colored lines represent monopile

Generalized Preconditioning to Accelerate Simulations with Large Multiphase Chemical Kinetics Models

Creator:: Walker, Anthony S.
Abstract:: Combustion emissions produced from burning real transportation fuels have many environmental impacts. However, detailed chemistry across multiple phases, time scales, and thermodynamic conditions make predicting combustion emissions challenging. Detailed modeling of the gas phase alone is prohibitively expensive, due to the large size and stiffness of the kinetic models. The...
Resource Type:: Dissertation
Full Text:: = b, A ∈ Cm×n, m ≥ n, b ∈ Cm (2.2.32) to describe the method. A direct solution of (2.2.32) is x = A

Resilient Design for Complex Engineered Systems in the Early Design Phase

Creator:: Keshavarzi, Elham
Abstract:: There are many uncertainties that complex engineered systems will face throughout their lifecycles due to changes in internal and external conditions. It is desirable for complex engineered systems to be resilient against various uncertainties. The ability to overcome such uncertainties should be embedded into the system from the beginning. However,...
Resource Type:: Dissertation

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