Essays about: "actuator disk"

Found 5 essays containing the words actuator disk.

  1. 1. Propulsion modelling of a generic submarine propeller

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Gustav Boman; [2023]
    Keywords : OpenFOAM; CFD; actuator line model; rotor disk; actuator disk; INSEAN E1619; propeller;

    Abstract : Self propulsion modelling is important in order to accurately simulate ships and submarinesusing Computational Fluid Dynamics (CFD). However, fully resolved simulations of hull andpropeller geometries are computationally heavy and time consuming. As such there is a greatinterest in lower order CFD models of propellers. READ MORE

  3. 2. A simplified vortex method for wind turbine simulation

    University essay from KTH/Strömningsmekanik och Teknisk Akustik

    Author : Sandro Malusa; [2019]
    Keywords : Wind turbine; Vortex model; Numerical wake model; Vortex sheet; Vortex filament; Tjaereborg; Biot-Savart law; Iterative method;

    Abstract : A new vortex model for wind turbines was developed in order to evaluate the loads at the blades and other important characteristics of interest for the wind industry such as power and thrust coefficients. Nowadays, the calculation of these quantaties is done in a reliable and precise manner with LES simulation using actuator line or actuator disk models. READ MORE

  4. 3. Partially Parabolic Wind Turbine Flow Modelling

    University essay from KTH/Mekanik

    Author : Sebastian Haglund El Gaidi; [2018]
    Keywords : Wind turbine flow; Single wind turbine; Computational fluid dynamics; Partially parabolic Navier-Stokes equations; Finite difference method.;

    Abstract : Climate change is an evermore urging existential treat to the human enterprise. Mean temperature and greenhouse gas emissions have in-creased exponentially since the industrial revolution. But solutions are also mushrooming with exponential pace. READ MORE

  5. 4. Accuracy of transient versus steady state forces on a rudder operating in a propeller slipstream

    University essay from Umeå universitet/Institutionen för fysik

    Author : Erik Löfgren; [2015]
    Keywords : Unsteady flows; rudders; propellers; fluid mechanics; performance prediction; unsteady aerofoils;

    Abstract : In computational fluid dynamics (CFD), a transient simulation is in general more costly than computing the steady state of the system, if such a state exists. The velocity field produced by the propeller blades upstream of a rudder is transient in nature, and rudder design using CFD may therefore become very time-consuming. READ MORE

  6. 5. Propulsion Unit of a 3DOF Helicopter

    University essay from Linköpings universitet/Fluida och mekatroniska system; Linköpings universitet/Tekniska fakulteten

    Author : Gustav Ling; Jesper Persson; [2015]
    Keywords : propulsion unit; helicopter; rig; dynamics; thrust rig; mechatronics; 3DOF; tandem helicopter; DC motor; brushless DC motor; brushed DC motor; APC; Maxon; propeller mount; tandem helicopter;

    Abstract : This Bachelor thesis is a part of a bachelor project which includes building, programming and controlling a 3DOF tandem helicopter. This particular report deals with the propulsion units, i.e. the motors and propellers of the helicopter. READ MORE