Influencing flow of fluids

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F15Hydraulics devices F15DFLUID DYNAMICS

F15D1/00Influencing flow of fluids

F15D1/0005Baffle plates F15D1/001Flow of fluid from conduits such as pipes, sleeves, tubes, with equal distribution of fluid flow over the evacuation surface F15D1/0015Whirl chambers F15D1/002by influencing the boundary layer F15D1/0025using passive means F15D1/003comprising surface features F15D1/0035in the form of riblets F15D1/004oriented essentially parallel to the direction of flow F15D1/0045oriented essentially perpendicular to the direction of flow F15D1/005in the form of dimples F15D1/0055comprising apertures in the surface, through which fluid is withdrawn from or injected into the flow F15D1/006comprising moving surfaces, wherein the surface, or at least a portion thereof is moved or deformed by the fluid flow F15D1/0065using active means F15D1/007comprising surfaces being moved by external supplied energy F15D1/0075comprising electromagnetic or electrostatic means for influencing the state of the fluid F15D1/008comprising fluid injection or suction means F15D1/0085Methods of making characteristic surfaces for influencing the boundary layer F15D1/009by means of vortex rings F15D1/0095by means of injecting jet pulses of fluid wherein the injected fluid is taken from the fluid and re-injected again F15D1/02in pipes or conduits F15D1/025by means of orifice or throttle elements F15D1/04Arrangements of guide vanes in pipe elbows or duct bends Construction of pipe conduit elements or elbows with respect to flow, specially for reducing losses in flow F15D1/06by influencing the boundary layer F15D1/065Whereby an element is dispersed in a pipe over the whole length or whereby several elements are regularly distributed in a pipe F15D1/08of jets leaving an orifice F15D1/10around bodies of solid material F15D1/12by influencing the boundary layer F15D1/14Diverting flow into alternative channels