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Filtering by: DOI 10.1007/s10592-012-0420-4 Remove constraint DOI: 10.1007/s10592-012-0420-4 Degree Field Mechanical Engineering Remove constraint Degree Field: Mechanical Engineering

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  • 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:
    _________________________________________________________ 61 3.6. Bibliography _________________________________________________________ 62 4. The Yttria

  • Assessing Mass Diffusion Modeling in Premixed Flames

    Creator:
    Fillo, Aaron J.
    Abstract:
    Implementing multicomponent diffusion in numerical combustion studies is computationally expensive due to the challenges involved in computing diffusion coefficients. As a result, mixture-averaged diffusion treatments or simpler methods are used to avoid these costs. However, the accuracy and appropriateness of the mixture-averaged diffusion model has not been verified for three-dimensional...
    Resource Type:
    Dissertation
    Full Text:
    Hamlington is a co-author on the manuscript presented in Chapter 4 and assisted with data interpretation and

  • Effect of Laser Powder Bed Fusion Parameters and Hot Isostatic Pressing on the Microstructure and Mechanical Properties of C22 Alloy

    Creator:
    Yan, Dongqing
    Abstract:
    A nickel-based Hastelloy C22 powder with a nominal composition of Ni-21.30Cr-13.36Mo-1.92Co-2.94W-3.85Fe-0.23Mn-0.3V(wt%) and particle size distribution of D₁₀=23.8±0.3 μm, D₅₀=37.5±0.2μm, and D₉₀=59.3±1.1 μm was gas atomized to be used as a feedstock in Laser Powder Bed Fusion (LPBF). In this study, laser power and scanning speed were optimized to manufacture specimens...
    Resource Type:
    Masters Thesis
    Full Text:
    review, Int. J. Adv. Manuf. Technol. 67 (2013) 1191–1203. https://doi.org/10.1007/s00170-012-4558-5

  • Computational Modeling of Smoldering Combustion in Wildland Fuels

    Creator:
    Jayasuriya, Waduge Jayani A.
    Abstract:
    Smoldering combustion in wildland fires is a critical phenomenon that needs in-depth study because it can initiate with weaker ignition sources, can persist for long periods, is difficult to suppress, and can transit to flaming combustion. Cellulose, hemicellulose, and lignin are the major organic constituents within biomass, in varying proportions...
    Resource Type:
    Dissertation
    Full Text:
    contract number W912HQ-16-C-0045. TABLE OF CONTENTS Page 1 Introduction 1 2 Background 4 2.1

  • Exploring the Ductility Minimum of Niobium C103 at Intermediate Temperatures using Triaxial Tensile Specimens

    Creator:
    Wood, Thomas N., II
    Abstract:
    This work explores the mechanical properties of single-phase niobium alloy C103 from room temperature to 600°C for the purpose of expanding safe uses of the material into new applications. The study utilizes a symmetrically notched triaxial tensile specimens to manipulate the internal stress field in order to observe the changes...
    Resource Type:
    Masters Thesis
    Full Text:
    ……………………………..…………………………….19 3.3.1 Strain Rates………………………………………………………..21 3.3.2 Analysis……………………………………………………………21 4

  • Synthetic Lubricant Performance in Enclosed Gearbox Applications at Extreme Temperature

    Creator:
    Marr, Carter J.
    Abstract:
    The goal of this paper is to evaluate how synthetic lubricants perform in an enclosed gearbox application when compared with a proven mineral oil. This is in an effort to improve gearbox efficiency with the desired effect of lower emissions from of improved energy output from power generation. Four liquid...
    Resource Type:
    Masters Thesis
    Full Text:
    lubricants in enclosed gearbox applications 4 2.1 Introduction

  • Analysis of heat transfer, including axial conduction, for laminar tube flow with arbitrary circumferential wall heat flux

    Creator:
    Faghri, Mohammad
    Abstract:
    This thesis is concerned with the analysis of heat transfer in a tube with forced flow under conditions of an arbitrary variation of wall heat flux both axially and circumferentially. This total study is separated into two distinct problems which are presented separately. The first is the case of a...
    Resource Type:
    Dissertation
    Full Text:
    for the Special Example q(I) = qav( 1+b cos 4)) 145 3. CONCLUSIONS AND RECOMMENDATIONS 167 4

  • Soot Modeling: GPU Accelerated Direct Simulation Monte Carlo

    Creator:
    Lorson, Paige
    Abstract:
    For this project, we designed a soot modeling software to produce a full particle density function. This model uses the Direct Simulation Monte Carlo with a full conditioning particle selection method to capture soot nucleation and coagulation in a diffusion flame. We investigate the use of graphic processing units as...
    Resource Type:
    Capstone Project
    Full Text:
    , pp. 689–697. isbn: 978-0-387-09766- 4. doi: 10.1007/978-0-387-09766-4_2. url: https://doi.org

  • Design for Clean Technology Adoption: Application of Discrete Choice Analysis and the Theory of Planned Behavior for Development Engineering

    Creator:
    Pakravan, Mohammad H.
    Abstract:
    Clean technologies can address multiple challenges associated with climate change, environmental protection, and human health. However, the impact desired by introduction of such technologies is achievable only if new options effectively replace inefficient, conventional practices. This ‘design for adoption’ requires understanding of user motivations, associated beliefs, context of use, and...
    Resource Type:
    Dissertation
    Full Text:
    ............................................................................................................... 62 Chapter 4 An Agent-Based Modeling approach for clean technologies adoption using Theory of

  • Ignition of Fuel Beds by Firebrands

    Creator:
    Bean, Derek R.
    Abstract:
    The severity of wildfires around the globe is increasing. At the same time, urban development is expanding outward into areas where severe fires occur. There is an increased risk of home loss to fires in areas where severe fires and urban expansion meet. Ignition of homes or nearby fuel is...
    Resource Type:
    Dissertation
    Full Text:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3 Modeling Efforts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3