Search for dissertations about: "Wake"

Showing result 21 - 25 of 187 swedish dissertations containing the word Wake.

  1. 21. Shedding light on the bluff body wake instability

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Renzo Trip; KTH.; KTH.; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk mekanik; Engineering Mechanics;

    Abstract : The flow around a vehicle, for example, results in a large resistance and can generate a complex swirl pattern behind the body of the vehicle, which can lead to strong alternating lateral forces. There is therefore a clear need for more fundamental understanding of the instability of this so-called wake region, which arises behind bluff bodies. READ MORE

  2. 22. Numerical computations of wind turbine wakes and wake interaction

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Karl Nilsson; KTH.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : When wind turbines are placed in farms, wake effects reduce the overall power production. Also, turbine loads are significantly increased since turbulence levels are high within the wake flow. READ MORE

  3. 23. Medicine for Uncertain Futures A Nigerian City in the Wake of a Crisis

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Ulrika Andersson Trovalla; Uppsala universitet.; [2011]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; HUMANITIES and RELIGION History and philosophy subjects Ethnology Cultural anthropology; HUMANIORA och RELIGIONSVETENSKAP Historisk-filosofiska ämnen Etnologi Kulturantropologi; Kulturantropologi; Cultural Anthropology;

    Abstract : The Nigerian city of Jos used to be seen as a peaceful place, but in 2001 it was struck by clashes that arose from what was largely understood as issues of ethnic and religious belonging. The event, which would become known as ‘the crisis’, was experienced as a rupture and a loss of what the city had once been, and as the starting point of a spiral of violence that has continued up to today. READ MORE

  4. 24. Wind turbines over a hilly terrain: performance and wake evolution

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Ann Hyvärinen; KTH.; KTH.; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fluid mechanics; wind turbines; complex terrain; wind-tunnel measurements; Strömningsmekanik; vindturbiner; komplex terräng; vindtunnelmätningar; Teknisk mekanik; Engineering Mechanics;

    Abstract : The aim of this licentiate thesis is to investigate wind-turbines placed in a complex-terrain environment. This is done by studying the flow around small-scale wind-turbine models placed over a landscape model with hills, and by comparing the results with corresponding data obtained over a flat terrain model. READ MORE

  5. 25. Feathers by day, membranes by night - Aerodynamic performance in bird and bat flight

    University dissertation from Department of Biology, Lund University

    Author : Florian Muijres; Lunds universitet.; Lund University.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; animal flight; aerodynamics; vortex wake; actuator disk; flight performance; span efficiency; bird; bat; wind tunnel; PIV; Pied Flycatcher; Glossophaga soricina; Leptonycteris yerbabuenae;

    Abstract : Popular Abstract in English Animal flight has always intrigued people, and different aspects of animal flight have therefore widely been studied by biologists, physicists and engineers. At least to me, the aspect concerning the aerodynamics of animal flight in particular is very interesting because of the complex temporal varying wake dynamics as a result of continually wing morphing in flapping flight. READ MORE