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Filtering by: Creator Griebeler, W. L. Remove constraint Creator: Griebeler, W. L. Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

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  • Orb Web Vibrations: Modeling, Localization, and Measurement

    Creator:
    Otto, Andrew W.
    Abstract:
    The orb web is a multipurpose structure---serving as a home for its inhabitant spider, as a prey capture device, and as a physical extension of the spider’s sensing abilities. Biologists are particularly interested in the spider’s ability to locate prey trapped in its web by sensing the vibrations induced from...
    Resource Type:
    Dissertation
    Full Text:
    Spider Webs Using Frequency-Based Dynamic Substructuring Andrew W. Otto, Damian O. Elias, and Ross L

  • An analytical model for fatigue crack propagation

    Creator:
    Anderson, James L.
    Abstract:
    Beginning with the basic equations from the theory of elasticity and employing a model of crack propagation based on the concept of a constant plastic energy absorption per unti of crack extension, the commonly accepted power law of fatigue crack propagation was derived. This derivation uses an extension of the...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF James L. Anderson for the

  • Control of spring-mass running robots

    Creator:
    Vejdani Noghreiyan, Hamid Reza
    Abstract:
    We seek the control strategies that are applicable on legged robots and control them to run in real world as robust and efficient as animals. To achieve this goal, we need to understand the principles of legged locomotion and the control policies that animals use during running. In this study...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Jonathan W. Hurst We seek the control strategies that are applicable on legged robots and

  • Modeling hop kilning with respect to energy consumption and drying kinetics

    Creator:
    Thomas, Matthew W.
    Abstract:
    Currently, little work has been performed studying energy consumption in hop kilning. This thesis explores drying with an alternative drying schedule that extends the initially elevated drying temperature currently used by growers and examines its impact on drying time and energy use. Extending the time of the initially elevated drying...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Matthew W

  • Optimal control of an underactuated bipedal robot

    Creator:
    Jones, Mikhail S.
    Abstract:
    Bipedal robots represent a unique class of control problems that combine many of the most difficult elements of nonlinear control. These robots are typically designed to be mobile and as such have limited energy and actuator authority making efficiency a prime concern. Unlike wheeled robots, legged robots must transition between...
    Resource Type:
    Masters Thesis
    Full Text:
    : Jonathan W. Hurst Bipedal robots represent a unique class of control problems that combine many of the

  • Transient fuel pin temperature calculations using describing functions

    Creator:
    Guidotti, Timothy E.
    Abstract:
    An important element in rector safety and fuel performance assessments is the efficient calculation of the time dependent temperature profiles within reactor fuel pins. Because the fuel pins have temperature dependent thermal properties, the governing partial differential equations are nonlinear. Traditionally, finite difference or finite element methods have been used...
    Resource Type:
    Masters Thesis
    Full Text:
    .4 .5 .8 .7 .8 NORMALIZED RADIUS Figure 9 .9 1.3 14 1.0 14 1.0 CA -3 -J .2ao w .7Z <> ,g L

  • An investigation of the effects of radial acceleration on a fluidized bed used for filtration of air-borne particulate of submicron size

    Creator:
    Junge, David C.
    Resource Type:
    Dissertation
    Full Text:
    respect to fluidized beds. Doctoral Committee: R. W. Boubel, J. Go Mingle, F, a Schaumburg, L. D. Calvin

  • Tentative equilibrium diagram for the nickel-rich end of the nickel-zirconium system

    Creator:
    Armstrong, Asa William
    Resource Type:
    Dissertation
    Full Text:
    ; chemical section, analyses; H. G. Anderson, R. L. Carpenter, D. K. Deardorff, H. G. Nelson, R. W

  • An experimental investigation of combustion products through a flat, laminar, pre-mixed hydrocarbon-air flame

    Creator:
    Brenchley, David Lee
    Abstract:
    Flat, laminar, premixed hydrocarbon-air flames were stabilized on a porous-plate burner. In addition to temperature profiles, concentration profiles were measured for methane, ethane, ethylene, propane, acetylene, propylene, carbon monoxide, carbon dioxide and oxides of nitrogen. Dead space thickness, luminous flame zone thickness and hydrocarbon disappearance point responses were also monitored....
    Resource Type:
    Dissertation
    Full Text:
    , Phillips, L. D. Calvin, and W. A. Davies. NOMENCLATURE A experimental factor A: hydrocarbon fuel type

  • Two-Color Laser Induced Fluorescence Imaging of Fluid Temperature for Free Convection and Vapor Condensation

    Creator:
    McAfee, Rachel
    Abstract:
    The development of a continuous and reliable cooling method for computer chips is an evolving subject requiring continuous research in both computer science and thermal management. Two-color laser induced fluorescence (LIF) provides a non-invasive way to investigate electronics cooling fluid behavior. Dielectric fluids are of particular interest as they allow...
    Resource Type:
    Masters Thesis
    Full Text:
    Joshua L. Gess The development of a continuous and reliable cooling method for computer chips

  • Tracking of Melt Pool Motion Using Numerical Analysis of Laser Powder Bed Fusion

    Creator:
    Cox, Bryce
    Abstract:
    Laser Powder Bed Fusion (LPBF) is a process commonly used to create additively manufactured metal parts. The flexibility and complexity allowed by the LPBF process provides opportunity for significant advancement in multiple industries as parts can be customized in shape and function for specific needs. These benefits can be compounded...
    Resource Type:
    Dissertation
    Full Text:
    . Abstract approved: ______________________________________________________ Joshua L. Gess Laser

  • Geometry of Locomotion

    Creator:
    Ramasamy, Suresh
    Abstract:
    Many animals and robots move through the world by coupling cyclical changes in shape called gaits to an interaction with the environment. Because mobility is an important aspect of such robots, a key metric when evaluating design and performance of mobile robots is the efficiency of their optimal gaits. The...
    Resource Type:
    Dissertation
    Full Text:
    : Geometry of Locomotion Abstract approved: Ross L. Hatton There are four major contributions described in

  • Experimental Design Approach for Evaluation of Airfoil-Driven Energy Harvesting

    Creator:
    Strahl, Jordan D.
    Abstract:
    An experimental setup has been partially developed to investigate the impact of an actively controlled trailing edge component upon the energy harvesting performance of an oscillating airfoil in a pitching and heaving regime. While previous and current efforts have and continue to function to characterize the performance of such a...
    Resource Type:
    Honors College Thesis
    Full Text:
    extrapolated as follows: 𝑅𝑒 = 𝑉𝐿 𝜈 (11) 𝑉 = 𝑅𝑒𝜈 𝐿 (12) In Equation 12, L is the

  • The Mira 2 Rocket Engine: Applying Lessons Learned for an Improved Iteration

    Creator:
    Dimas-Harms, Colton R.
    Abstract:
    In this paper, I present the design of Mira 2, a small-scale, liquid bipropellant rocket engine, with a specific focus on its oxidizer-centered pintle injector. Building upon the valuable lessons and insights gained from the empirical testing of its predecessor, Mira 1, the Mira 2 engine incorporates several improvements and...
    Resource Type:
    Capstone Project
    Full Text:
    ) Characteristic Chamber Length (L*) 1417.32 (55.8) mm (inch) Nozzle Throat Diameter 55.37 (2.180) mm (inch

  • Numerical modeling of the hydrodynamics of gas fluidized beds

    Creator:
    Wang, Yusan
    Abstract:
    This research involves a numerical study of the hydrodynamics of gas fluidized beds. We use the continuum model, treating both gas and particles as interpenetrating continua. The motion of gas and particles is strongly coupled by the interactions between them. For simplicity, we only consider drag forces. We use MacCormack's...
    Resource Type:
    Dissertation
    Full Text:
    W H l Ml • 1 ClI Hi 1 ft* ft N Ol XI H- VI Ul 01 CI 11 1 3 O M H 1 I I * o AI H| 1 0

  • Advanced Computational Modeling and Design of Wave Energy and Floating Offshore Wind Energy Technologies

    Creator:
    Mankle, Hannah L.
    Abstract:
    Given the immense energy potential of o shore wind and ocean waves, offshore renewable energy can significantly contribute to the renewable energy landscape. Fixed floating wind is already making strides internationally with increased electricity capacity, while floating offshore wind turbines and marine hydrokinetic (MHK) technology have significant potential that can...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Hannah L. Mankle for the degree

  • Temperature Evolution of Nonreacting Spark Kernels at Sub-Atmospheric Pressures

    Creator:
    Caplan, Daniel L.
    Abstract:
    In the event of a mid-flight flameout of a gas turbine engine, reignition is paramount to occupant safety. Ignition at high altitude can be challenging, due in part to the potentially lower ambient pressures. An understanding of the effects of sub-atmospheric pressures on the temperature evolution of spark kernels is...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Daniel L. Caplan for the

  • A quantitative study of recirculation in cooling towers

    Creator:
    Chiang, Chung
    Resource Type:
    Masters Thesis
    Full Text:
    . h5 Table 2A. CALCULATED RECIRCULATION FACTOR DATA rhGbvw(w gAr*R (Degree) .p (%) t.7 65 1,7 65 L

  • Exact frequencies and mode shapes of a rotating beam

    Creator:
    Wright, A. D. (Alan Duane), 1954-
    Abstract:
    The exact frequencies and mode shapes of flexural vibration of a rotating beam are found. The beam has a linear mass and stiffness distribution. With certain simplifying assumptions, the kinetic and potential energies of the rotating beam are found. Hamilton's principle is then used to determine the equation governing the...
    Resource Type:
    Masters Thesis
    Full Text:
    : Redacted for privacy Robert W. Thresher The exact frequencies and mode shapes of flexural vibration of a

  • A simplified model of heat transfer between large-particle gas-fluidized beds and immersed surfaces

    Creator:
    Bakke, Paul D.
    Abstract:
    A simplified model of the combined particle convective and radiative components of heat transfer between large-particle gas-fluidized beds and immersed surfaces was developed. This analytical model was based on the single particle formulation of Adams and Welty [4,9], with the added assumptions of one-dimensional heat conduction in the particle and...
    Resource Type:
    Masters Thesis
    Full Text:
    Description Units k s particle thermal conductivity W/mK k l' k 2 parameters appearing in Eqs. (2.4-2.7