Browsing by Supervisor "Amaral Teixeira, Joao"

Browsing by Supervisor "Amaral Teixeira, Joao"

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  • Assessment of the power available in a fixed offshore oscillating water column plant 
    Holzhauer, Eva (Cranfield University, 2012-12)
    The early effects of the global warming can be observed and people around the world are beginning to realize the seriousness of the situation. Reducing the CO2 emissions produced by fossil energy seems to be one of the ...
  • CFD Analyses of Centrifugal Pumps with Emphasis on Factors Affecting Internal Pressure Pulsations 
    Spence, R. (Cranfield University, 2006-10)
    The operation of centrifugal pumps can generate instabilities and pressure pulsations that may be detrimental to the integrity and performance of the pump. Until recently these pressure pulsations could only be determined ...
  • Development of a Port-Hamiltonian Model for use in oscillating water column control scheme investigations. 
    Farman, Judith (Cranfield UniversitySOE, 2014-12)
    With global energy demand estimated to rise considerably and global warming accepted by the majority of scientists, the pressure to reduce fossil fuel usage is increasing. To this end, the UK government has set a target ...
  • Development of turbines for use in oscillating water columns. 
    Tarver, B. (2013-01)
    Bidirectional impulse turbines for oscillating water column wave power devices have the inherent problem of pressure losses associated with the outlet guide vane, adversely affecting the performance of the turbine. Two ...
  • Diagnosis of low-speed bearing degradation using acoustic emission techniques 
    Alshimmeri, Fiasael (Cranfield University, 2017-01)
    It is widely acknowledged that bearing failures are the primary reason for breakdowns in rotating machinery. These failures are extremely costly, particularly in terms of lost production. Roller bearings are widely used ...
  • The effects of wear on abradable honeycomb labyrinth seals 
    Collins, Dermot (Cranfield University, 2007-03)
    This thesis reports on work undertaken to understand the effects, due to wear, on the performance of abradable honeycomb labyrinth seals. The phenomena studied are aerodynamic in nature and include compressible flow, ...
  • Heat removal in axial flow high pressure gas turbine 
    Alhajeri, Hamad (Cranfield University, 2016)
    The demand for high power in aircraft gas turbine engines as well as industrial gas turbine prime mover promotes increasing the turbine entry temperature, the mass flow rate and the overall pressure ratio. High turbine ...
  • Heat removal in high pressure turbine seal segments 
    Alenezi, Abdulrahman H. (Cranfield University, 2017-02)
    An important parameter for turbomachinery designers is “clearance control”, because the clearances between interfaces must be set to optimum values to maximize power output, operational life and efficiency. Leakage of ...
  • Optimisation of bidrectional impulse turbines for wve power generation 
    Banks, K (Cranfield University, 2009-03)
    The generation of electricity from ocean waves using oscillating water column (OWC) wave energy converters is currently uneconomic due to the high capital cost and low efficiencies of such devices. The bidirectional air ...
  • Tidal turbine modelling from the perspective of design and operation 
    Corsar, Michael (Cranfield University, 2016-06)
    The aim of this thesis is to study the effects of turbulent flow on a fixed pitch tidal current turbine from the perspective of turbine design and operation. A prototype turbine, Deltastream as it is known, is being ...
  • Transition Modelling for Axial Compressor Flows 
    Beevers, A. (Cranfield University, 2008-11-03)
    Abstract The application of Menter's transition model (Menter et al. (2004a), here-after known as the ץ - θ model) available in the CFX CFD code, for use within an axial compressor design group was studied. Simulations ...
  • Unsteadiness In An Embedded Axial Compressor Stage 
    Naylor, Edward (Cranfield University, 2008-02)
    Previous research on blade boundary layers in turbomachinery have been recognised to crucially influence the stability and performance of the gas turbine components. The interactions between rotating and stationary blade ...