Essays about: "turbulence decay"

Showing result 6 - 9 of 9 essays containing the words turbulence decay.

  1. 6. The impact of turbulence on supernovae shockwaves

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Loke Lönnblad Ohlin; [2018]
    Keywords : astrophysics; astronomy; supernovae; shockwaves; interstellar medium; massive stars; turbulence; molecular clouds; Physics and Astronomy;

    Abstract : The momentum and energy injection from supernovae is one of the main feedback modes, and is therefore key to the understanding of galaxy evolution and star formation. However, due to low resolution, large scale galaxy simulations often have issues with accurately modelling supernovae, and therefore rely on sub-grid models. READ MORE

  3. 7. Defining the Wake Decay Constant as a Function of Turbulence Intensity to Model Wake Losses in Onshore Wind Farms

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Jochanan Kollwitz; [2016]
    Keywords : N.O. Jensen model; wake losses; onshore; wind farms; forested terrain; wake decay constant; turbulence intensity; windPRO;

    Abstract : Modelling the wake effect generated by wind turbines is an essential part for calcu- lating a wind farm’s expected energy production. Operating wind turbines disturb the flow of the wind, which results in decreased production of downwind turbines. The N. O. READ MORE

  4. 8. Wake Prediction and Modeling Improvement of an existing model

    University essay from KTH/Aerodynamik

    Author : Jacques Wild; [2014]
    Keywords : ;

    Abstract : This thesis is dedicated to the study of atmospheric turbulence and its effects on wake-vortex decay. Wake-vortices are a by-product of the lift that makes every aircraft fly. Under certain special conditions, the decay-time of a wake-vortex can be high and thereby impose constrains on separation between aircrafts. READ MORE

  5. 9. Developing boundary conditions usingthe nesting technique on simple terrain : A study of wind and turbulence intensity proles sensitivity

    University essay from Institutionen för kultur, energi och miljö

    Author : Raphael Desilets-Aube; [2011]
    Keywords : Lillgrund; turbulence intensity; WindSim; case study; actuator disc model; roughness length; boundary conditions;

    Abstract : As wind industry is developing steadily oshore, the wind turbine spacing remainsa key element for maximizing revenues and reducing loading from turbineswake interaction. In the case of relatively close to shore oshore wind farms, orlarge arrays onshore, the turbulence intensity coming from dierent sectors canhave an eect on wake growth and decay. READ MORE