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Filtering by: Creator Wiens, R. C. Remove constraint Creator: Wiens, R. C. Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

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  • Condensation of a zeotropic mixture, R-454C, and its individual components, R-1234yf and R-32, in microfin tubes

    Creator:
    Matty, Ethan P.
    Abstract:
    This work compares the condensation heat transfer and pressure drop for zeotropic refrigerant R-454C and its individual components, R-32 and R-1234yf, in horizontal microfin tubes. One microfin tube has a 4 mm outer diameter, 0.18 mm wall thickness, and a surface area ratio of 1.56. The second tube has a...
    Resource Type:
    Masters Thesis
    Full Text:
    complete condensation of R-454C, R-1234yf and R-32 for saturation temperatures of 40, 50 and 60 °C and

  • Design, analysis, and validation of composite c-channel beams

    Creator:
    Koski, William C.
    Abstract:
    A lightweight carbon fiber reinforced polymer (CFRP) c-channel beam was previously designed using analytical theory and finite element analysis and subsequently manufactured through a pultrusion process. Physical testing revealed the prototype did not meet the bending and torsional stiffness of the beam model. An investigation revealed that the manufactured prototype...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF William C

  • Evaluation of Materials for Use in Open-Cycle Magnetohydrodynamic Power Generation

    Creator:
    Bowen, Michael S.
    Abstract:
    Recent interest in oxy-fuel combustion for carbon capture, as well as advancements in technologies such as magnetics, materials, and computational modeling has sparked renewed interest in magnetohydrodynamic (MHD) power generation. The increased temperatures of oxy-fuel combustion versus air-fuel combustion poses a challenge in the selection of materials for plasma exposed...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________________________________ David P. Cann C. Rigel Woodside Abstract: Recent interest in oxy-fuel combustion for carbon

  • A study of laser processed intermetallics

    Creator:
    Roub, Evangeline R.
    Abstract:
    The effects of laser processing of Ni₃Al, TiAl, Fe₃Al, and Ni₃Si on microstructure and phase composition were characterized using optical and scanning electron microscopy and X-ray diffraction analysis. It was found that laser processing resulted in melt zones of ordered phases with fine grains and microstructures. The effects of heat...
    Resource Type:
    Masters Thesis
    Full Text:
    , N 4' A," N'It' , c ik 6 1% r sA 4 %OP. -4;4 .% . 4.' lu"' 4. ^ t s. . II "A.. 0 . iro-ir. ; . .4

  • Microwave sintering of alumina-titanium cermets

    Creator:
    Wrzesinski, Wendell R.
    Abstract:
    The influence of microwave radiation on the fabrication of cermet materials has been investigated for alumina-titanium cermets with compositions ranging from 20 to 80 wt. % titanium. An industrial microwave oven was characterized and adapted to process cermet materials. Physical and mechanical property determinations were made as a function of...
    Resource Type:
    Masters Thesis
    Full Text:
    ABSTRACT OF THE THESIS OF Wendell R. Wrzesinski for the degree of Master of Material Science in Mechanical

  • Nonlinear adaptive control of highly maneuverable high performance aircraft

    Creator:
    Cho, Sul
    Abstract:
    This thesis presents an effective control design methodology using a one-step-ahead prediction adaptive control law and an adaptive control law based on a Lyapunov function. These control law were applied to a highly maneuverable high performance aircraft, in particular, a modified F/A-18. An adaptive controller is developed to maneuver an...
    Resource Type:
    Dissertation
    Full Text:
    (8V)cos(OT)sin(c) (2.2.30) TyR = TRcos(8V)sin(c)+TRsin(8V)cos(3,r)cos(c) (2.2.31) Tza = TRsin

  • 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:
    : R. W. Bo bel The mechanisms which are involved in filtration of air-borne particulate matter have

  • Optimization of staged rankine energy conversion cycles for high efficiency

    Creator:
    Simmons, Larry Dean
    Abstract:
    Because of the fuel crisis and problems associated with thermal pollution there is new impetus and urgency for developing more efficient energy conversion systems for power generation. A preliminary analysis was undertaken to determine the potential of staged Rankine cycle systems for substantially higher efficiency. It was necessary to optimize...
    Resource Type:
    Dissertation
    Full Text:
    appreciated. The doctoral committee members, Dr. R. J. Zaworski, Dr. J. R. Welty, Dr. J. C. Ringle, and Dr

  • Design of a mechanically assisted dependent transfer mechanism for use on board commercial aircraft

    Creator:
    Gibson, Brenton D.
    Abstract:
    Business and recreation in the modern day world often include air travel as their cornerstone. Travelers who are disabled and wheelchair bound have to undergo a transfer process to board and deplane a commercial aircraft. This transfer process is typically done manually, with agents physically lifting the passenger who is...
    Resource Type:
    Masters Thesis
    Full Text:
    :    _________________________________________________________  Joseph R. Zaworski    Business and recreation in the modern day world often include air travel

  • 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:
    AN ABSTRACT OF THE THESIS OF Michael C. Devin for the