Sökning: "tunnel"
Visar resultat 16 - 20 av 407 avhandlingar innehållade ordet tunnel.
16. Male moth behaviour and perception in pheromone plumes
Sammanfattning : Behaviour of male moths and electrophysiological responses of male pheromone-specific olfactory receptor neurones were studied in two model species, the oriental fruit moth Grapholita molesta and the turnip moth Agrotis segetum. The studies were aimed at elucidating the relative importance of different mating disruption mechanisms. LÄS MER
17. Durability of fire exposed concrete : Experimental Studies Focusing on Stiffness & Transport Properties
Sammanfattning : Road and rail tunnels are important parts of the modern infrastructure. High strength concrete (HSC) is commonly used for tunnels and other civil engineering structures, since it allows high load carrying capacity and long service life. In general, Swedish road and rail tunnels should be designed for a service life of 120 years. LÄS MER
18. Evaluation and modeling of the flow in a slotted wall wind tunnel
Sammanfattning : As vehicle manufacturers strive to shorten the development time of new models, an increasing share of the aerodynamic development work is shifted from wind tunnel testing of prototype vehicles to numerical simulations of virtual models. However, comparing measurements from the wind tunnel with numerical simulation data is not straightforward due to several interference effects occurring between the wind tunnel and the tested vehicle. LÄS MER
19. Scaling techniques using CFD and wind tunnel measurements for use in aircraft design
Sammanfattning : 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. LÄS MER
20. Norms and legal rules : An investigation of the tunnel construction through the Hallandsås ridge
Sammanfattning : In 1992 Swedens biggest tunnelproject begun. Two 8.5 km tunnels should cross a big ridge in southern Sweden which was seen as an obstacle to a fast and efficient railway line connecting Oslo and Gothenburg with Malmö and Copenhagen. However, the project had to stop in 1997 due to environmental damages. LÄS MER