Essays about: "Propeller design"

Showing result 1 - 5 of 27 essays containing the words Propeller design.

  1. 1. RoBuoy : Dynamic Positioning of an Autonomous Buoy using GNSS

    University essay from KTH/Mekatronik; KTH/Mekatronik

    Author : Erik Anderberg; Martin Olanders; [2021]
    Keywords : Autonomous; Buoy; GPS; GNSS; Robot; Mechatronics; Dynamic positioning; Autonom; Boj; GPS; GNSS; Robot; Mekatronik; Dynamisk positionering;

    Abstract : Buoys anchored to the seabed are often used for marking courses in competitive sailing and other water sports, but they may need to be relocated several times per day. To avoid the time and fuel consuming labour of raising and moving the anchors, a prototype of an autonomous buoy using electric motors to maintain its position was built and tested. READ MORE

  2. 2. Undocumented oil leakages : A study about stern tube seals and leakages

    University essay from Linnéuniversitetet/Sjöfartshögskolan (SJÖ)

    Author : Johan Lundberg; [2021]
    Keywords : Oil lubricated stern tube; Water lubricated stern tube; Oil; Oil leakage; Oil spill; stern tube seal; vessel; Oljesmord propellerhylsa; Vattensmord propellerhylsa; Olja; oljeutsläpp; Oljeläckage; propellerhylstätning; Fartyg;

    Abstract : The majority of the vessels in the commercial fleet utilize oil lubricated stern tubes. Unfortunately, this brings about a risk of oil leaking from the stern tube into the marine environment if the stern tube seal would become worn or damaged by foreign materials. Previous studies concluded that, on average, 2. READ MORE

  3. 3. Analysis and Initial Optimization of The Propeller Design for Small, Hybrid-Electric Propeller Aircraft

    University essay from KTH/Flygdynamik

    Author : Ali Alshahrani; [2020]
    Keywords : Electric; hybrid; Propeller; Optimization; variable pitch; fixed pitch; blades number; Eldrivet; hybrid; Propeller; Optimering; justerbar vinkel; fast vinkel; bladnummer;

    Abstract : This thesis focuses on the optimization of the electric aircraft propeller in order to increaseflight performance. Electric aircraft have limited energy, particularly the electricmotor torque compared to the fuel engine torque. For that, redesign of the propeller forelectric aircraft is important in order to improve the propeller efficiency. READ MORE

  4. 4. Regression Models of 3D Wakes for Propellers

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : Christian Karlsson; [2018]
    Keywords : Propeller design; Wake; Velocity distribution; Regression analysis; Fourier series; Skewed-Gaussians; Coherent structure coloring; Propeller design; Medströmsfält; Hastighetsfördelning; Regressionsanalys; Fourierserier; Skeva-Gaussfördelningar; Koherenta struktureringsfärgmetoden;

    Abstract : In this work, regression models for the wake field entering a propeller at certain axial andnominal position have been proposed. Wakes are non-uniform flows following a body immersedin a viscous fluid. We have proposed models for the axial and tangential velocity distribution asfunctions of ship hull and propeller measures. READ MORE

  5. 5. Examination and Design of Propeller Configurations foran Electrically Powered Hydrofoil Vehicle

    University essay from KTH/Marina system

    Author : Joakim Wallberg; [2018]
    Keywords : ;

    Abstract : The thesis examines propeller configurations for the propulsion system for the water mode in the amphibious craft concept Newt, which also includes contra-rotating propellers. Newt is a research project on innovative commuter vehicles carried out by the naval architecture department at KTH. READ MORE