Browsing NTNU Open by Title
Now showing items 72532-72551 of 100943
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Pressens syn på naboen i øst
(Bachelor thesis, 2019) -
Pressure and inertia sensing drifters for glacial hydrology flow path measurements
(Peer reviewed; Journal article, 2020)Glacial hydrology plays an important role in the control of glacier dynamics, of sediment transport, and of fjord and proglacial ecosystems. Surface meltwater drains through glaciers via supraglacial, englacial and subglacial ... -
Pressure and strain measurement during hot extrusion of aluminium
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:50, Doctoral thesis, 2005)The aluminium extrusion process is based on simple principles, but allows profiles with the most complex cross-sectional shapes to be produced at a very high rate. One of the greatest challenges of aluminium extrusion is ... -
Pressure Control for Offshore Managed Pressure Drilling (MPD): Analysis, Design, and Experimental Validation
(Doctoral thesis at NTNU;2016:96, Doctoral thesis, 2016)Deepwater offshore drilling operations are among the most complex activities. For example in regions such as the Gulf of Mexico, wells are drilled in water depths of up to 3 kilometers, drilling depths can exceed 6 ... -
Pressure Control of Nonferroelastic Ferroelectric Domains in ErMnO<inf>3</inf>
(Journal article; Peer reviewed, 2023)Mechanical pressure controls the structural, electric, and magnetic order in solid-state systems, allowing tailoring of their physical properties. A well-established example is ferroelastic ferroelectrics, where the coupling ... -
Pressure controlled ventilation of the swimming pool
(Master thesis, 2019)Svømmehaller er komplekse bygninger med høyt energiforbruk og utfordrende innendørsforhold. Inneklimaet er varmt og fuktig, derfor må den mekaniske ventilasjonsteknikken beskytte bygningen mot fuktighet. Svømmeanlegg med ... -
Pressure drop in charge mixture in silicon production
(Master thesis, 2020)Lavere energiforbruk, en mer miljøvennlig produksjon og høyere silisium utbytte er viktige mål i silisium industrien. For å oppnå disse målene kreves det at prosessene i ovnen er stabile. Flere operasjonelle problemer har ... -
Pressure Fluctuations and Correlations in Steady State two Phase Flow in Porous Media
(Master thesis, 2013)This thesis investigates the burst size distribution and pressurecorrelation profiles of steady state two phase flow in porous mediaat various capillary numbers and viscosity ratios. A network modelis used to simulate ... -
Pressure Fluctuations in Steady State Two-Phase Flow in Porous Media
(Master thesis, 2013)Several aspects of two-phase flow in porous are examined numerically.The burst size distributions in both the invasion phase and steady stateare computed; above a threshold, the steady state distribution is found tobe ... -
Pressure from Media and Physical Appearance Self-Esteem in Adolescence - A Bidirectional Relationship?
(Master thesis, 2024)Tripartite Influence Model (TIM) foreslår at utseendepress og internalisering av utseendeidealer er kausale faktorer som bidrar til kroppsmisnøye, som er en etablert risikofaktor for spiseforstyrrelser. Det er derimot en ... -
Pressure Loss in Natural Gas Pipelines: Experimental Studies of Gas-Particle Flow, Wall Roughness and Drag Reduction
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:205, Doctoral thesis, 2009) -
Pressure loss measurements and predictions for net structures perpendicular to the flow.
(Master thesis, 2010)A flow loop was designed, built and used in determining the pressure loss and pressure loss coefficient over five net structures suspended normal to the water flow. The basis was to validate pressure loss calculated by ... -
Pressure measurements inside a Francis turbine runner
(Master thesis, 2016)Over the last years, there have been several incidents with cracks in high head Francis turbines. These cracks are understood to be related to pressure pulsations, vibration modulus and combination of these. In this paper, ... -
Pressure oscillations during start and stop of a high head Francis turbine
(Master thesis, 2012)Start and stop procedures affect pressure oscillations throughout a hydropower plant. A desire to study how pressure oscillations behave during these dynamic conditions was the basis of this report. Instrumentation, ... -
Pressure Perpendicular to the Grain in Wooden Sills: Numerical Studies of Softening and Failure in Abaqus
(Master thesis, 2012)Joints with pressure perpendicular to the grain are a common occurrence in wooden structures. While the making of such a joint is very simple, dimensioning it is difficult: The load configuration causes a mix of ductile ... -
Pressure Pulsation and Stresses in a Francis Turbine Operating at Variable Speed
(Master thesis, 2018)The introduction of new intermittent energy sources on the electrical grid increases the need of regulated power to ensure stability of grid frequency. Hydropower has the unique possibility to deliver both stability and ... -
Pressure Pulsations and Fatigue Loads in High Head Francis Turbines
(Journal article; Peer reviewed, 2019)The Norwegian power system today includes a relatively large percentage of Francis turbines with a head of above 300m, in the world. This leads to a need to maintain and develop the national competence regarding the ... -
Pressure pulsations and stress in a high head Francis model turbine
(Master thesis, 2013)Model tests on a high head francis turbine has been conducted at the waterpower laboratory at NTNU. Simultaneous measurements of the pressure were performed on different parts of the waterway. Compact RIO hardware and ... -
Pressure pulsations and stress in a high head turbine ? comparison between model and geometrically similar prototype.
(Master thesis, 2013)AbstractThe aim if this Master?s thesis was to establish relation between pressure pulsation amplitude in a model and a geometrical similar prototype. Model test has been conducted in the Water Power Laboratory at Norwegian ... -
Pressure pulsations and thermodynamic efficiency measurements at Smeland power plant
(Master thesis, 2018)In this master thesis, the cause and solution of a problem at Smeland power plant have been thoroughly investigated. The power plant has for years experienced severe pressure pulsations in their Francis turbine at full ...