Blar i Fakultet for ingeniørvitenskap (IV) på tittel
Viser treff 22901-22920 av 23013
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Wind tunnel experiments on wind turbine wakes in yaw: effects of inflow turbulence and shear
(Journal article; Peer reviewed, 2018)The wake characteristics behind a yawed model wind turbine exposed to different customized inflow conditions are investigated. Laser Doppler anemometry is used to measure the wake flow in two planes at x∕D = 3 and x∕D = 6, ... -
Wind tunnel experiments on wind turbine wakes in yaw: redefining the wake width
(Journal article; Peer reviewed, 2018)This paper presents an investigation of wakes behind model wind turbines, including cases of yaw misalignment. Two different turbines were used and their wakes are compared, isolating effects of boundary conditions and ... -
Wind tunnel investigation on the effect on the turbine tower on wind turbines wake symmetry
(Journal article; Peer reviewed, 2017)In wind farms, the wake of the upstream turbines becomes the inflow for the downstream machines. Ideally, the turbine wake is a stable vortex system. In reality, because of factors like background turbulence, mean flow ... -
Wind tunnel model testing of offshore platforms
(Master thesis, 2012)The purpose of this thesis is to highlight some of the areas of interest when it comes to wind tunnel experimenting of offshore platforms regarding stability concerns such as critical angles and wind overturning moment. ... -
Wind tunnel study on power output and yaw moments for two yaw-controlled model wind turbines
(Journal article; Peer reviewed, 2018)In this experimental wind tunnel study the effects of intentional yaw misalignment on the power production and loads of a downstream turbine are investigated for full and partial wake overlap. Power, thrust force and yaw ... -
Wind Tunnel Study on the Tip Speed Ratio’s Impact on a Wind Turbine Wake Development
(Peer reviewed; Journal article, 2022)(based on the turbine diameter and the freestream velocity). For all cases, the mean streamwise velocity deficit at the centerline evolves close to a power law in the far wake, and we check the validity of the Jensen and ... -
Wind Tunnel Testing of Bridge Decks
(Master thesis, 2016)The studies done in this thesis was connected to an early stage implementation of a new test method for ?nding aerodynamic properties of bridge deck sections at the Norwegian University of Science and Technology (NTNU), ... -
Wind tunnel testing of bridge decks - Vindtunneltesting av brutverrsnitt
(Master thesis, 2018)First different designs of bridges were investigated to lay out an overview of what bridge designs there were on the table for production and testing. Different bridge cross sections seemed to be favourable for different ... -
Wind turbine blade icing detection: a federated learning approach
(Peer reviewed; Journal article, 2022)Wind farms are often located at high latitudes, which entails a high risk of icing for wind turbine blades. Traditional anti-icing methods rely primarily on manual observation, the use of special materials, or external ... -
Wind Turbine Design: Evaluation of Dynamic Loads on Large Offshore Wind Turbines
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:241, Doctoral thesis, 2012)A design method for combined aerodynamic and structural (aeroelastic) design of large wind turbine blades has been developed, with the purpose of facilitating conceptual design, parametric studies, optimisation, or cost ... -
Wind turbine drivetrains condition monitoring through SCADA data on farm level
(Master thesis, 2019)The offshore wind industry has grown rapidly over the last decade and drivetrains are increasing in size to reduce the cost of energy. These turbines are operating in a harsh environment. Adopting a preventive maintenance ... -
Wind turbine drivetrains: state-of-the-art technologies and future development trends
(Journal article; Peer reviewed, 2022) -
Wind Turbine Propulsion of Boats and Ships
(Master thesis, 2010)Increasing focus on reduction of CO2 emissions, and the possibility of future severe shortage of oil have sparked renewed interest in wind as supplementary propulsion of merchant ships. Several alternative solutions are ... -
Wind Turbine Simulations with OpenFOAM
(Master thesis, 2018)An actuator disk model is improved by including an impermeable hub and nacelle. This improves the wake flow a lot, but it turns out that the actuatorDiskExplicitForce model is mesh dependent. A mesh is made that provides ... -
Wind Turbine Wake Interactions - The Influence of Shear on a Wind Turbine Wake
(Master thesis, 2015)Full wake measurements have been performed on a model wind turbine at NTNU s wind tunnel to investigate the impact of shear flow compared to uniform flow on the wake flow. Mean and turbulent velocity measurements have been ... -
Wind-driven Rain Exposure and Assessment of Building Integrated Photovoltaic Systems
(Master thesis, 2016)This thesis is written as the final semester project of the five-year Master of Science program of Civil and Environmental Engineering (Bygg- og Miljøteknikk) at the Norwegian University of Science and Technology (NTNU) ... -
Wind-induced Dynamic Response and Aeroelastic Stability of a Suspension Bridge crossing Sognefjorden
(Master thesis, 2012)This thesis is a feasibility study, with regards to aerodynamic stability, about the possibility of constructing a suspension bridge with a main span of 3700m over the Sogne Fjord in Norway. The design wind velocity for ... -
Wind-induced Dynamic Response and Aeroelastic Stability of a Suspension Bridge crossing Sognefjorden
(Master thesis, 2012)This thesis is a feasibility study, with regards to aerodynamic stability, about the possibility of constructing a suspension bridge with a main span of 3700m over the Sogne Fjord in Norway. The design wind velocity for ... -
Wind-induced Dynamic Response of High Rise Buildings
(Master thesis, 2013)This thesis aims to investigate the dynamic response of a high rise concrete structure. Calculations are performed for Lerkendal Hotel, a slender 75 meter high building located in Trondheim. Buffeting response has been the ... -
Wind-Induced Response of Long-Span Suspension Bridges Subjected to Span-Wise Non-Uniform Winds: A Case Study
(Master thesis, 2017)The Hardanger Bridge has a main span of 1 310 meters which makes it the longest suspension bridge in Norway and among the top 15 longest in the world as of 2017. The bridge consists of only two traffic lanes and one ...