Blar i Institutt for energi og prosessteknikk på utgivelsesdato
Viser treff 21-40 av 3297
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Experimental investigation of turbulent flow in a channel with rough walls
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:62, Doctoral thesis, 2004)This thesis focuses on the effects of surface roughness on the turbulent structure in a two-dimensional channel flow. Various turbulence quantities have been investigated for a rough surface generated by either spanwise ... -
Time-dependent boundary conditions for multiphase flow
(Doktoravhandlinger ved NTNU, 1503-8181, Doctoral thesis, 2004)In this thesis a set of boundary conditions for multiphase flow is suggested. Characteristic-based boundary conditions are reviewed for single-phase flow. The problem of open-boundary conditions is investigated, and to ... -
An immersed interface method for two-dimensional modelling of stratified flow in pipes
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:139, Doctoral thesis, 2004)This thesis deals with the construction of a numerical method for solving two-dimensional elliptic interface problems, such as fully developed stratified flow in pipes. Interface problems are characterized by its non-smooth ... -
Residential CO2 Heat Pump System for Combined Space Heating and Hot Water Heating
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:53, Doctoral thesis, 2004)Carbon dioxide (CO2, R-744) has been identified as a promising alternative to conventional working fluids in a number of applications due to its favourable environmental and thermophysical properties. Previous work on ... -
An experimental investigation of draft tube flow
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:36, Doctoral thesis, 2004)This thesis presents a study of the flow in draft tubes on hydro turbines, with different runner cone configurations, operating in the part load operating range. Dynamic wall pressure measurements on a model Francis ... -
Numerical analysis of the head covers deflection and the leakage flow in the guide vanes of high head Francis turbines
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:115, Doctoral thesis, 2004)This thesis includes a brief presentation of the different losses developed in high head Francis turbines, where special attention is paid to the losses in the guide vanes due to the head covers deflection. The different ... -
Skinfriction in turbulent channel flow
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:97, Doctoral thesis, 2004)The main focus of this thesis is turbulent flow in a lubricated plane channel. This flow is mainly studied by direct numerical simulations (DNS). Both the lubricating film and the bulk-fluid velocity and pressure fields ... -
Valg mellom naturlig, hybrid og mekanisk ventilasjon
(Teknisk rapport / SINTEF energiforskning;, Research report, 2004) -
Experimental and theoretical study of a compression/absorption heat pump with ammonia/water as working fluid
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:82, Doctoral thesis, 2005) -
Effects of thermoacoustic waves on combustion
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:162, Doctoral thesis, 2005)This thesis presents the result of an investigation on the effect of acoustic waves on turbulent flames with particular focus on practical applications such as gas turbine engines. The objective is to study how pressure ... -
Catalytic conversion of biomass to produce higher quality liquid bio-fuels
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:187, Doctoral thesis, 2005) -
Chemical looping combustion : fuel conversion with inherent CO2 capture
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:2, Doctoral thesis, 2005)Chemical looping combustion (CLC) is a new concept for fuel energy conversion with CO2 capture. In CLC, fuel combustion is split into seperate reduction and oxidation processes, in which a solid carrier is reduced and ... -
The Non-Linear Microscale Flow Solver 3DWind. Developments and Validation
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:90, Doctoral thesis, 2005)This PhD thesis describes the implementation of a Reynolds Stress Model in the RANS microscale solver 3DWind, which is developed to model wind flow in complex terrain. The solver is also calibrated and validated with the ... -
Dynamic Modelling and Characterisation of a Solid Oxide Fuel Cell Integrated in a Gas Turbine Cycle
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:176, Doctoral thesis, 2005)This thesis focuses on three main areas within the field of SOFC/GT-technology: • Development of a dynamic SOFC/GT model • Model calibration and sensitivity study • Assessment of the dynamic properties of a SOFC/GT power ... -
Ventilation systems and their impact on indoor climate and energy use in schools : studies of air filters and ventilation control
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:111, Doctoral thesis, 2005) -
Experimental investigation of Solid Oxide Fuel Cells using biomass gasification producer gases
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:188, Doctoral thesis, 2005) -
Direct Numerical Simulation Of Turbulent Combustion Near Solid Surfaces
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:14, Doctoral thesis, 2006)This study uses Direct Numerical Simulation of turbulent reacting compressible plane channel flow at low Reynolds number in order to understand the physics of the interaction of a flame with the turbulent boundary layer ... -
Analysis of Natural Gas-Fired Power Cycles with Chemical Looping Combustion for CO2 Capture
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:138, Doctoral thesis, 2006)Chemical Looping Combustion (CLC) is a rather novel concept of hydrocarbon fuel energy conversion with inherent CO2 separation. In CLC, a solid oxygen carrier transports oxygen from air to the fuel; hence air and fuel ... -
Thermal corrections to the Casimir effect
(Journal article; Peer reviewed, 2006)The Casimir effect, reflecting quantum vacuum fluctuations in the electromagnetic field in a region with material boundaries, has been studied both theoretically and experimentally since 1948. The forces between ... -
Droplet impaction on solid surfaces exposed to impinging jet fires
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:169, Doctoral thesis, 2006)The thermal response of hot surfaces exposed to impinging jet fire and subsequent impacting water droplets is investigated. The research was done mainly experimentally by utilizing three different concepts. This included ...