Browsing Mechanical engineering by Title
Now showing items 290-309 of 431
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Nanoscale Engineering and Characterization of Synthetic and Biological Ferroelectrics
(2013-02-25)The works presented in this dissertation focus on the characterization, manipulation, and engineering of synthetic and biological ferroelectrics using piezoresponse force microscopy (PFM) and nanoimprint lithography (NIL). ... -
Noise From Shallow Underwater Explosions
Naval activities such as ordnance disposal, demolition and requisite training, can involve detonation of small explosive charges in shallow water that have the potential to harm nearby marine life. Measurements of the ... -
Noise From Shallow Underwater Explosions
Naval activities such as ordnance disposal, demolition and requisite training, can involve detonation of small explosive charges in shallow water that have the potential to harm nearby marine life. Measurements of the ... -
Noise From Shallow Underwater Explosions
Naval activities such as ordnance disposal, demolition and requisite training, can involve detonation of small explosive charges in shallow water that have the potential to harm nearby marine life. Measurements of the ... -
Numerical Analysis of an Axial Flow Horizontal Axis Marine Hydrokinetic Turbine
Tidal energy extraction using marine hydrokinetic devices has become an important area of research in the renewable energy field in recent years because of the highly predictable nature of the tides. Due to its early stage ... -
Numerical investigation of Marine Hydrokinetic Turbines: methodology development for single turbine and small array simulation, and application to flume and full-scale reference models.
A hierarchy of numerical models, Single Rotating Reference Frame (SRF) and Blade Element Model (BEM), were used for numerical investigation of horizontal axis Marine Hydrokinetic (MHK) Turbines. In the initial stage the ... -
Numerical investigation of the combustion of liquid oxygen droplets in an environment of hydrogen under microgravity conditions
To develop more effective and better cryogenic powered liquid rocket engines, it is vital to undertake further studies to better understand the behavior of the LOX/LH2 system. This work studies the configuration of a single ... -
A numerical investigation of the gas-phase dynamics of small pool fires
(2002)This work is an investigation, through direct numerical simulation, of the gas-phase dynamics of small circular pool fires. The objectives are: to determine the mechanisms that contribute to vortex formation and their ... -
Numerical methods for the characterization of transverse low velocity impact in stochastic tow based discontinuous fiber composites
Stochastic tow-based discontinuous composite (STBDC) laminates are made from compression-molded tows of carbon fiber reinforced polymer (CFRP). STBDCs are a material system that can be manufactured in complex three-dimensional ... -
Numerical Modeling of Compliant-Moored System Dynamics with Applications to Marine Energy Converters
(2014-04-30)The development of a numerical model simulating the dynamic response of compliant-moored submerged systems to non-uniform fluid flow is presented. The model is meant to serve as a computational tool with applications to ... -
Numerical Modeling of the Effects of a Free Surface on the Operating Characteristics of Marine Hydrokinetic Turbines
(2013-07-25)Marine Hydrokinetic (MHK) turbines are a growing area of research in the renewable energy field because tidal currents are a highly predictable clean energy source. The presence of a free surface may influence the flow ... -
Numerical modelling of heat transfer and evaporation characteristics of cryogenic liquid propellant
Passive and active technologies have been used to control propellant boil-off, but the current state of understanding of cryogenic evaporation and condensation in microgravity is insufficient for designing large cryogenic ... -
Numerical Simulation of a Cross Flow Marine Hydrokinetic Turbine
(2012-08-10)In the search for clean, renewable energy, the kinetic energy of water currents in oceans, rivers, and estuaries is being studied as a predictable and environmentally benign source. We investigate the flow past a cross ... -
Numerical Simulation of Admiralty Inlet, WA, with Tidal Hydrokinetic Turbine Siting Application
(2012-09-13)Tidal hydrokinetic energy has been recognized as a potential source of sustainable, renewable energy. In order to properly site turbines for commercial-scale development, the complex flow conditions in a potential deployment ... -
Numerical Simulation of Debris Impact on Hydrokinetic Infrastructure
This thesis studies the impacts of river debris on a hydro-kinetic infrastructure (Research Debris Diversion Platform - RDDP) by coupling Computational Fluid Dynamics (CFD) and Discrete Element Method (DEM). Debris under ... -
A numerical study of attached oblique detonation
(1993)The goal of this research is to develop a predictive capability for oblique detonation waves (ODWs). Planar wedge flows and axisymmetric conical flows are considered. The Rankine-Hugoniot solution is reviewed first, which ... -
Obtaining Material Properties of the Plantar Soft Tissue for a Patient-Specific Finite Element Model of the Foot
(2012-08-10)<italic>Background</italic>: People with diabetes account for just over 8% of the US population, but they undergo approximately 63% of all non-traumatic lower limb amputations, or 65,700 amputations per year. ... -
On the Development of a Robotic Biarticular Prosthesis Emulator
People with transtibial limb loss experience decreased walking ability and have long-term musculoskeletal issues, such as knee osteoarthritis. Currently available ankle-foot prostheses, which only actuate the ankle joint, ... -
On the simulation and modeling of turbulent reacting flows
(1996)A computational algorithm is described for Direct Numerical Simulation (DNS) of a reactive plume in spatially-evolving, grid turbulence. The chemistry follows the single-step, irreversible, global reaction: $Fuel+(r)Oxid ... -
On the structural and acoustic design of guitar soundboards
(1990)An assumed mode model of a guitar soundboard has been built and experimentally verified. The frequency range of interest was from 55 to 880 Hertz, covering the frequency range of the fundamentals of the notes played on the ...