Sökning: "pitching"

Visar resultat 1 - 5 av 16 avhandlingar innehållade ordet pitching.

  1. 1. Adaptive Mesh Refinement and Simulations of Unsteady Delta-Wing Aerodynamics

    Författare :Yann Le Moigne; KTH; []
    Nyckelord :delta wing; high angle of attack; vortex; pitching; mesh refinement; UCAV; vortex sensor; tensor ofvelocity gradients;

    Sammanfattning : This thesis deals with Computational Fluid Dynamics (CFD)simulations of the flow around delta wings at high angles ofattack. These triangular wings, mainly used in militaryaircraft designs, experience the formation of two vortices ontheir lee-side at large angles of attack. LÄS MER

  3. 2. Stability and transition in pitching wings

    Författare :Prabal Negi; Dan Henningson; Ardeshir Hanifi; Philipp Schlatter; Olivier Marquet; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Flyg- och rymdteknik; Aerospace Engineering; Vehicle and Maritime Engineering; Farkostteknik;

    Sammanfattning : The aeroelastic stability of airplanes is one of the most important aspects of airplane design. Flutter or divergence instabilities arising out of the interaction of fluid forces and structural elasticity must be avoided by design or through the limitation of the flight envelope. LÄS MER

  4. 3. CFD simulations of delta wing pitching to high alpha

    Författare :Yann Le Moigne; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  5. 4. Hydro-mechanical optimization of a wave energy converter

    Författare :Chisom Miriam Ekweoba; Andrej Savin; Halvar Gravråkmo; Uppsala universitet; []
    Nyckelord :Ballast optimization; analytical model; pitching wave energy converter; power absorption performance; wave energy converter; geometry optimization; genetic algorithm; floating platform; extended degrees of freedom; beam model; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : Wave energy conversion technology has gained popularity due to its potential to be-come one of the most preferred energy sources. Its high energy density and low car-bon footprint have inspired the development of many wave energy converter (WEC) technologies, few of which have made their way to commercialisation, and many are progressing. LÄS MER

  7. 5. Methods for eliminationg bacterial infections in lignocellulosic material

    Författare :Emma Johansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Fermentering; bakteriell infektion;

    Sammanfattning : Bacterial infection is a major problem in industrial fermentations and may cause tremendouslosses in ethanol yield if not dealt with properly.Lignocellulose is an inhibitory fermentation media which may impose increased stress on thefermenting organism, Saccahromyces cerevisiae, often leading to a decreased cell viabilityand fermentation performance deteriorating. LÄS MER