Search for dissertations about: "Henrik Alfredsson"

Showing result 21 - 25 of 26 swedish dissertations containing the words Henrik Alfredsson.

  2. 21. Scaling techniques using CFD and wind tunnel measurements for use in aircraft design

    Author : Karl Pettersson; Arthur Rizzi; Henrik Alfredsson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CFD; wind tunnel; scaling; Reynolds number effect; Vehicle engineering; Farkostteknik;

    Abstract : This thesis deals with the problems of scaling aerodynamic data from wind tunnel conditions to free flight. The main challenges when this scaling should be performed is how the model support, wall interference and the potentially lower Reynolds number in the wind tunnel should be corrected. READ MORE

  4. 22. Plasma actuators for separation control on bluff bodies

    Author : Julie A. Vernet; P. Henrik Alfredsson; Ramis Örlu; Gunilla Efraimsson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Mechanics; Teknisk mekanik;

    Abstract : .... READ MORE

  5. 23. Plasma actuators for separation control - design and application

    Author : Julie Vernet; Henrik Alfredsson; Marios Kotsonis; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : .... READ MORE

  6. 24. Dynamics of Exhaust Valve Flows and Confined Bluff Body Vortex Shedding

    Author : Marcus Winroth; P. Henrik Alfredsson; Knud Erik Meyer; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Mechanics; Teknisk mekanik;

    Abstract : This thesis can be divided into two interconnected topics; engine exhaust-valve flows and confined bluff-body vortex shedding. When optimising engine flow systems it is common to use low order simulation tools that require empirical inputs, for instance with respect to flow losses across the exhaust valves. READ MORE

  7. 25. On Gas Dynamics of Exhaust Valves

    Author : Marcus Winroth; P. Henrik Alfredsson; Ramis Örlü; Knud Erik Meyer; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Exhaust valve; poppet valve; dynamic valve; engine modeling; discharge coefficient; Avgasventil; rörlig ventil; motorsimulering; utsläppskoefficient; Engineering Mechanics; Teknisk mekanik;

    Abstract : With increasing effects of global warming, efforts are made to make transportationin general more fuel efficient. When it comes to internal combustion engines,the most common way to improve fuel efficiency is through ‘downsizing’. Downsizingmeans that a smaller engine (with lower losses and less weight) performsthe task of a larger engine. READ MORE