Browsing Institutt for energi og prosessteknikk by Title
Now showing items 1131-1150 of 4210
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Effect of free stream turbulence on wind turbine performance
(Master thesis, 2013)In this Master Thesis the effect of free stream turbulence has been investigated on a model wind turbine's performance characteristics and the wake development downstream. The experiment took place in the recirculating ... -
Effect of Heat Flux and External System Configuration on Pressure Drop Oscillations in a Horizontal Pipe
(Master thesis, 2015)Heat transfer processes can greatly benefit from the use of the boiling and condensation in two-phase flows. However, the use of two-phase flows may induce instabilities in the heat transfer system, causing control problems ... -
The effect of hydrogen addition on the amplitude and harmonic response of azimuthal instabilities in a pressurized annular combustor
(Peer reviewed; Journal article, 2021)The present work introduces an annular combustion chamber operated at intermediate pressures. The combustor is operated with CH-H blends leading to a variety of azimuthal combustion instabilities. The influence of the ... -
The Effect of Hydrogen Enrichment on the Thermoacoustic Behaviour of Lean Premixed Flames
(Doctoral theses at NTNU;2022:23, Doctoral thesis, 2022)Gas turbines (GT) burning hydrogen can help deliver large-scale zero carbon power generation and facilitate rapid decarbonisation over the short to medium term. They can also play a crucial role in increasing the penetration ... -
The effect of hydrogen enrichment, flame-flame interaction, confinement, and asymmetry on the acoustic response of a model can combustor
(Peer reviewed; Journal article, 2022)To maximise power density practical gas turbine combustion systems have several injectors which can lead to complex interactions between flames. However, our knowledge about the effect of flame-flame interactions on the ... -
The Effect of Hydrogen On Non-linear Flame Saturation
(Peer reviewed; Journal article, 2023)We investigate the effect of hydrogen enrichment on the non-linear response and saturation of premixed methane/hydrogen flames submitted to acoustic forcing. The thermal power is kept fixed to preserve the nozzle velocity ... -
The effect of inlet turbulence on the quiescent core of turbulent channel flow
(Peer reviewed; Journal article, 2022)The impact of inlet turbulence on the structure of turbulent channel flow is investigated using particle image velocimetry. Streamwise–wall-normal plane measurements are performed in a channel, where different turbulence ... -
Effect of marine atmospheric flow under extreme wind-wave conditions on floating PV systems
(Bachelor thesis, 2023)Solenergi har vist seg å være en låvende fornybar energikilde. Flytende solcelle systemer er et godt alternativ til landbaserte solcellesystemer ettersom de krever mindre landområde og har høyere effektivitet på grunn av ... -
The Effect of Methane–Ammonia and Methane–Hydrogen Blends on Ignition and Light-Around in an Annular Combustor
(Journal article; Peer reviewed, 2023)The use of hydrogen and ammonia in gas turbines, either alone or blended with natural gas, poses various technical challenges for combustion systems, including ignition. Depending on the fuel composition, the laminar flame ... -
Effect of noise and nonlinearities on thermoacoustics of can-annular combustors
(Peer reviewed; Journal article, 2020)Can-annular combustors consist of N distinct cans setup symmetrically around the axis of the gas turbine. Each can is connected to the turbine inlet by means of a transition duct. At the turbine inlet, a small gap between ... -
Effect of power ultrasound and Fenton reagents on the biomethane potential from steam-exploded birchwood
(Journal article; Peer reviewed, 2019)The global demand for non-fossil energy sources is increasing rapidly. As a result, biogas presents a suitable alternative; however, first generation biofuels (e.g., sugar cane) potentially impact food crops globally. ... -
The effect of pressure on lean premixed hydrogen-air flames
(Journal article; Peer reviewed, 2023)The effect of pressure on the propagation of lean premixed hydrogen-air flames is investigated numerically with a hierarchy of canonical configurations including direct numerical simulations of turbulent flames in homogeneous ... -
The Effect of Rectangular Confinement Aspect Ratio On the Flame Transfer Function of a Turbulent Swirling Flame
(Peer reviewed; Journal article, 2022)The flame transfer function (FTF) has been experimentally investigated for a premixed, turbulent and highly swirled flame in rectangular enclosures with varying aspect ratio. A range of equivalence ratios and inlet bulk ... -
The effect of Stefan flow on Nusselt number and drag coefficient of spherical particles in non-isothermal gas flow
(Peer reviewed; Journal article, 2021)A Stefan flow can be generated during a phase change or reactions of a particle immersed in a fluid. This study investigates the effect of Stefan flow on the exchange of momentum (drag coefficient (CD)) and heat transfer ... -
EFFECT OF STORAGE TIME AND CONDITIONS ON BIOMASS CHARCOAL PROPERTIES
(Journal article; Peer reviewed, 2015)In this work, effects of storage time and conditions on the properties of one woody charcoal were studied. Analyses results showed that the volatile matter content of the charcoal samples collected from the bottom section ... -
Effect of subcooling using expander-compressor unit in transcritical CO2
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Effect of T-groove Parameters on Steady-State Characteristics of Cylindrical Gas Seal
(Peer reviewed; Journal article, 2020)Gas film seal technology is becoming increasingly important as an advanced new rotary shaft seal technology in aviation engines and industrial gas turbines. In this paper the impacts of several parameters of T-groove ... -
Effect of Temperature and Duration of Torrefaction on the Thermal Behavior of Stem Wood, Bark, and Stump of Spruce
(Journal article; Peer reviewed, 2017)In this work the torrefaction of different parts of Norway spruce (stem wood, bark, and stump) was studied. Three different torrefaction temperatures were applied: 225, 275, and 300 °C with 30 and 60 minutes isothermal ... -
Effect of the Availability of the Source of Nitrogen and Phosphorus in the Bio-Oxidation of H2S by Sulfolobus metallicus
(Peer reviewed; Journal article, 2023)The effect of nitrogen and phosphorus availability on the growth of Sulfolobus metallicus was analyzed. This archaeon was subjected to a series of nitrogen and phosphorus limitation conditions to determine their effects ... -
Effect of the turbulent flow field on NOx formation in a hydrogen flame
(Master thesis, 2023)Gitt den økende hastigheten på klimaendringene, har behovet for å erstatte tradisjonelle fossile brensler aldri vært viktigere. Gassturbiner, som hovedsakelig bruker metan som brennstoff, bidrar betydelig til karbonutslippene ...