Search for dissertations about: "vortex generator"
Showing result 6 - 10 of 17 swedish dissertations containing the words vortex generator.
-
6. Flow Control and Shape Optimization of Intermediate Turbine Ducts for Turbofan Engines
Abstract : Demands on improved efficiency, reduced emissions and lowered noise levels cause a strive towards high by-pass ratios of commercial turbofan engines. This results in an increased radial offset between the high- and low-pressure turbines. Thus the design of the intermediate turbine duct connecting the two turbines becomes more challenging. READ MORE
-
7. Aerodynamic Design and Optimization of Intermediate Ducts for High By-pass Ratio Jet Engines
Abstract : Demands on improved efficiency and reduced noise levels cause a strive toward high by-pass ratio commercial aero engines. This results in multi-spool aero engines with small high-pressure ratio cores and large fans. The low-pressure system has a lower rotational speed and a larger radius than the high-pressure core system. READ MORE
-
8. FLOW FIELD IN A HIGH HEAD FRANCIS TURBINE DRAFT TUBE DURING TRANSIENT OPERATIONS
Abstract : Hydroelectricity plays an important role to balance the stability of grid network. In order to improve the stability of presently high loaded grids, hydropower plants are being operated over a wide range of operations and experiencing frequent start-stop, load rejection, and load acceptance. READ MORE
-
9. Experimental study of the turbulent flow in a plane asymmetric diffuser
Abstract : The separating turbulent flow in a plane asymmetric diffuseris investigated experimentally. The considered flow case issuitable for fundamental studies of separation, separationcontrol and turbulence modelling. The flow case has beenstudied in a specially designed wind-tunnel under wellcontrolled conditions. READ MORE
-
10. Multidisciplinary Design in Aeronautics, Enhanced by Simulation-Experiment Synergy
Abstract : This thesis covers some aspects of current aircraft design, and presents how experiment and simulation are used as tools. Together they give enhanced effects over employing either one separately. The work presented has been produced using both simulations and experiments. READ MORE