Sökning: "Air transport technology"

Visar resultat 21 - 25 av 229 avhandlingar innehållade orden Air transport technology.

1. 21. Air-pocket transport in conjunction with bottom-outlet conduits for dams

   Författare :Ting Liu; Anders Wörman; James Yang; Staffan Lundström; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Air-water two-phase flow; critical velocity; diameter effect; roughness; VOF model; bottom outlet; experiment;

   Sammanfattning : Undesired air entrainment in bottom outlet conduits of dams may cause pressure transients, leading to conduit vibrations, blowback, discharge pulsation and even cavitation, and jeopardize the operational safety. Due to design limitations or construction costs, it is impossible to create an air free environment in a pressurized pipe. LÄS MER

3. 22. Teknik på bönders villkor : de tekniska och politiska aktörernas inflytande på den statsreglerade tekniska förändringen i Sverige 1806-1972

   Författare :Ulf Hamilton; Kent Zetterberg; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; History of technology; state technology; Göta Canal; railway; motor traffic; air transport; nuclear energy; technical actor; political actor; technical political actor; decision-making; History; Historia; historia; History;

   Sammanfattning : The dissertation deals with History of technology in Sweden before, during and after the industrialization. A theory that technical actors have a growing influence on state technology chiefly owing to the industrialization is presented. LÄS MER

4. 23. Evaluation of Asphalt Field Cores with Simple Performance Tester and X-ray Computed Tomography

   Författare :Florentina Angela Farcas; Björn Birgisson; Xiaohu Lu; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; asphalt mixture; dynamic modulus; flow number; simple performance tester; X-ray computed tomography; air voids distribution;

   Sammanfattning : The importance of aggregate structure and air voids distribution for asphalt mixture rutting and cracking performance has been well established on the basis of experience and is well documented in the literature. Past and current investigations are limited to assessment of performance based on macroscopic behavior due to the difficulty associated with the quantitative measurement and analysis of the internal structure of asphalt mixtures. LÄS MER

5. 24. Simulations of Coastal Atmospheric Dynamics and Transport Processes

   Författare :Ragothaman Sundararajan; Dimitris Melas; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; coastal atmosphere; dynamics; transport; Lagrangian particle dispersion model; mesoscale model; turbulence; Geovetenskap; Earth sciences; Geovetenskap; Meteorology; meteorologi;

   Sammanfattning : The marine atmosphere can be highly variable in space and time, and the coastal terrain plays a crucial role in influencing its properties. These, in turn, determine the atmospheric transport in the coastal zone. LÄS MER

7. 25. Capacity utilization of the belly-hold in line-based air traffic : the present and the future

   Författare :Prabal Acherjee; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : .... LÄS MER