Blar i NTNU Open på forfatter "Æsøy, Vilmar"
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Experimental Investigation of Injection and Combustion Processes in Marine Gas Engines Using Constant Volume Rig
Krivopolianskii, Vladimir (Doctoral theses at NTNU;2019:96, Doctoral thesis, 2019)In circumstances of the strong demand for a reduction of harmful emissions from ships, one of the main pathways of the development of marine power plants is improvement of the existing and development of new gas engine ... -
Experimental Study of Ignition Delay, Combustion, and NO Emission Characteristics of Hydrogenated Vegetable Oil
Krivopolianskii, Vladimir; Bjørgen, Karl Oskar Pires; Emberson, David; Ushakov, Sergey; Æsøy, Vilmar; Løvås, Terese (Journal article; Peer reviewed, 2019)In this article, a comparative study of hydrogenated vegetable oil (HVO) and diesel was performed in two constant volume combustion rigs and an optical accessible compression-ignited chamber (OACIC). Ignition, combustion, ... -
Fault Prognostics Using LSTM Networks: Application to Marine Diesel Engine
Han, Peihua; Ellefsen, Andre; Li, Guoyuan; Æsøy, Vilmar; Zhang, Houxiang (Peer reviewed; Journal article, 2021)Maintenance is the key to ensuring the safe and efficient operation of marine vessels. Currently, reactive maintenance and preventive maintenance are two main approaches used onboard. These approaches are either cost-intensive ... -
Floating wind turbine mooring chain stress and fatigue analysis- Comparison between different solutions
Huse, Siren (Master thesis, 2022)I denne artikkelen har et nytt design for fortøyning av flytende vindturbiner blitt evaluert med hensyn til hvordan det påvirker topp kjettingen og sammenlignet med en lignende konstruksjon, et Fairlead som er en velprøvd ... -
Grønn kai 2023. Sluttrapport
Ekrem, Helene Ella Drevik; Degirmenci, Jan Fredrik; Hartveit, Ingrid Cecilia; Hellstrøm Olsen, Thomas; Johnsrud Vikan, Vetle; Lape Aasemyr, Anders; Opstad, Carina Sophie (Research report, 2023) -
Hydrogen as a Maritime Fuel – Can Experiences with LNG Be Transferred to Hydrogen Systems?
Nerheim, Ann Rigmor; Æsøy, Vilmar; Holmeset, Finn Tore (Journal article; Peer reviewed, 2021) -
Ice-propeller impact analysis using an inverse propulsion machinery simulation approach
Polić, Dražen (Doctoral theses at NTNU;2019:235, Doctoral thesis, 2019) -
Incorporating Approximate Dynamics Into Data-Driven Calibrator: A Representative Model for Ship Maneuvering Prediction
Wang, Tongtong; Li, Guoyuan; Hatledal, Lars Ivar; Skulstad, Robert; Æsøy, Vilmar; Zhang, Houxiang (Peer reviewed; Journal article, 2021)High-fidelity models capable of accurately predicting ship motion are critical for promoting innovation and efficiency in the maritime industry. However, creating an advanced model that comprehensively represents the system ... -
Integrated multi-domain system modelling and simulation for offshore crane operations
Chu, Yingguang; Æsøy, Vilmar; Ehlers, Sören; Zhang, Houxiang (Journal article; Peer reviewed, 2015)Advanced offshore machinery, such as an offshore crane, usually involves several energy domains. Modelling and simulation of multi-domain systems is challenging because of not only the complexity in modelling of the related ... -
Maritime Organizations Facing a New Era Servitization, technology implementation and professional work
Pareliussen, Bjarne (Doctoral theses at NTNU;2022:391, Doctoral thesis, 2022)Norsk sammendrag Denne avhandlingen undersøker organisatoriske endringer som en konsekvens av introduksjonen av digital teknologi og nye forretningsmodeller. Denne introduksjonen av teknologi kan sees i sammenheng med at ... -
Model Tests and Numerical Analysis of Wave Loads on Coastal Structures
Eliassen, Magnus Styrker (Master thesis, 2019)Denne forskningen er basert på å utforske effekten fra bølgekraft på kystnære strukturer. Et alternativ til dagens skiftende søkelys på renere og mer fornybar energi, er vindmøller plassert til sjøs. Mer spesifikt, er det ... -
Modeling and Simulation of Maritime Systems and Operations for Virtual Prototyping using Co-Simulations
Skjong, Stian (Doctoral theses at NTNU;2017:374, Doctoral thesis, 2017-12-19) -
Modeling and Simulation of the Accumulator During Active Heave Compensation Operations
Chu, Yingguang; Æsøy, Vilmar; Bunes, Øyvind; Pedersen, Eilif (Chapter; Peer reviewed, 2016)The paper presents the modeling and simulation of the thermodynamics of the accumulator system of the heave compensation system. Heave compensators in offshore and subsea applications are used to reduce the relative vertical ... -
Modeling, Simulation and Control of Motion Compensated Gangway in Offshore Operations
Yu, Feilong (2017;, Master thesis, 2017)This thesis is based on the idea to develop the integrated model of offshore gangway model including multi-body dynamics model and hydraulic system model with bond-graph method in 20-sim. And based on that model, active ... -
Mot klimanøytal oppdrettsnæring
Slotsvik, Håkon (Bachelor thesis, 2021)Jordkloden er under konstant press ved at vi mennesker slipper ut både gasser og kjemikalier til miljøet. Dette danner grunnlaget for å redusere utslippet av klimagasser til atmosfæren. Hensikten med min oppgave er å få ... -
Multilayer Spooling of High Performance Synthetic Fibre Ropes. Experimental investigations of rope properties and stresses in winch drums
Skarbøvik, Reidar André (Doctoral theses at NTNU;2021:337, Doctoral thesis, 2021)Winch drums can appear as relatively simple mechanical components. However, accurate quantification of loads in multilayer winch-rope systems depends on a complex interaction between rope and drum. As vital parts of ... -
Numerical Analysis and Model Tests of Hydrodynamic Loads on Perforated Plates
Sihan, Gao (Master thesis, 2020)Perforated plate structures are widely applied in the maritime industry, while the hydrodynamic loads on them are hard to predict. This thesis aims to explore a methodology to utilize Computational Fluid Dynamics (CFD) in ... -
Numerical Simulations of Sloshing and the Thermodynamic Response Due to Mixing
Grotle, Erlend Liavåg; Æsøy, Vilmar (Journal article; Peer reviewed, 2017)In this paper, we apply computational fluid dynamics (CFD) to study the thermodynamic response enhanced by sloshing inside liquefied natural gas (LNG) fuel tanks. An existing numerical solver provided by OpenFOAM is used ... -
Online Fault Detection in Autonomous Ferries: Using fault-type in-dependent spectral anomaly detection
Ellefsen, Andre; Han, Peihua; Cheng, Xu; Holmeset, Finn Tore; Æsøy, Vilmar; Zhang, Houxiang (Peer reviewed; Journal article, 2020)Enthusiasm for ship autonomy is flourishing in the maritime industry. In this context, data-driven Prognostics and Health Management (PHM) systems have emerged as the optimal way to improve operational reliability and ... -
Parameter Identification of Ship Manoeuvring Model Under Disturbance Using Support Vector Machine Method
Wang, Tongtong; Li, Guoyuan; Wu, Baiheng; Æsøy, Vilmar; Zhang, Houxiang (Peer reviewed; Journal article, 2021).Demanding marine operations increase the complexity of manoeuvring. A highly accurate ship model promotes predicting ship motions and advancing control safety. It is crucial to identify the unknown hydrodynamic coefficients ...