Sökning: "air entrainment"

Visar resultat 6 - 10 av 32 avhandlingar innehållade orden air entrainment.

  1. 6. Study of gas fuel jet burning in low oxygen content and high temperature oxidizer

    Författare :Magnus Mörtberg; Wlodek Blasiak; David G. Lilley; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; combustion; entrainment; jet in crossflow; PIV; ICCD; Materialvetenskap; Materials science; Teknisk materialvetenskap;

    Sammanfattning : During the past decade, new advanced combustion systems that share the same basic concept of using a substantially diluted and high-temperature oxidizer in the reaction volume have gained a great deal of interest regarding their application in industrial and power systems. These novel combustion technologies have proved to offer significant benefits compared to traditional combustion techniques. LÄS MER

  3. 7. 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

  4. 8. The rotating injector as a tool for exploring DI diesel combustion and emissions formation processes

    Författare :Magnus Sjöberg; KTH; []
    Nyckelord :diesel spray combusion; rotating injector. Air swirl; air fuel-mixing. Soot. NO. CO; flame visualization. Chemking modeling. Soot deposition;

    Sammanfattning : A diesel fuel injector has been modified to allow rotationaround its axis, driven by an electric motor. Injections at upto 6000 rpm from the rotating injector have been investigatedunder the influence of air swirl on one optical research engineand one optically accessible heavy-duty diesel engine. LÄS MER

  5. 9. Turbulence Structure and Fluxes over Sea

    Författare :Erik Nilsson; Anna Rutgersson; Mark Kelly; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Boundary-layer; Air-sea interaction; turbulent fluxes; Meteorology; Meteorologi;

    Sammanfattning : Understanding the processes that control air-sea exchange of momentum, sensible heat and moisture (latent heat) is of great importance for atmospheric and oceanic modelling. In the atmosphere, for instance, cyclone intensity and track depends on these processes. LÄS MER

  7. 10. CFD MODELLING OF TWO-PHASE FLOWS AT SPILLWAY AERATORS

    Författare :Penghua Teng; James Yang; Anders Wörman; Staffan Lundström; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; spillway; cavitation; aerator; air entrainment; air–water flow; VOF model; Two-Fluid model; Civil and Architectural Engineering; Byggvetenskap;

    Sammanfattning : Due to the high-speed flow in a chute spillway, cavitation damages often occur. This undesired phenomenon threatens the safety of the structure. For the purpose of eliminating the damages, an aerator is often installed in the spillway. To understand its characteristics, physical model tests are a popular method. LÄS MER