WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

F15D　FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS ({nozzles, spray heads B05B; devices to decrease friction or resistance or to increase speed of ships B63B; ship rudders B63H 25/38; influencing the flow or the viscosity of fluids with chemical additives C09K 3/00, C10M; hydraulic engineering E02B}; fluid circuit elements F15C; {one-way check valves F16K 15/00})

F15D 1/00 Influencing flow of fluids

F15D 1/0005 ・{Baffle plates}

F15D 1/001 ・{Flow of fluid from conduits such as pipes, sleeves, tubes, with equal distribution of fluid flow over the evacuation surface}

F15D 1/0015 ・{Whirl chambers}

F15D 1/002 ・{by influencing the boundary layer (F15D 1/06 and F15D 1/12 take precedence)}

F15D 1/0025 ・・[N: using passive means, i.e. without external energy supply

F15D 1/003 ・・・{comprising surface features, e.g. indentations or protrusions (F15D 1/0055, F15D 1/006 take precedence)}

F15D 1/0035 ・・・・{in the form of riblets }

F15D 1/004 ・・・・・{oriented essentially parallel to the direction of flow }

F15D 1/0045 ・・・・・{oriented essentially perpendicular to the direction of flow}

F15D 1/005 ・・・・{in the form of dimples}

F15D 1/0055 ・・・{comprising apertures in the surface, through which fluid is withdrawn from or injected into the flow}

F15D 1/006 ・・・{comprising moving surfaces, wherein the surface, or at least a portion thereof is moved or deformed by the fluid flow}

F15D 1/0065 ・・{using active means, e.g. supplying external energy or injecting fluid}

F15D 1/007 ・・・{comprising surfaces being moved by external supplied energy}

F15D 1/0075 ・・・{comprising electromagnetic or electrostatic means for influencing the state of the fluid, e.g. for ionising the fluid or for generating a plasma}

F15D 1/008 ・・・{comprising fluid injection or suction means}

F15D 1/0085 ・・{Methods of making characteristic surfaces for influencing the boundary layer}

F15D 1/009 ・{by means of vortex rings}

F15D 1/0095 ・{by means of injecting jet pulses of fluid wherein the injected fluid is taken from the fluid and re-injected again, e.g. synthetic jet actuators (F15D 1/008 takes precedence)}

F15D 1/02 ・in pipes or conduits

F15D 1/025 ・・{by means of orifice or throttle elements}

F15D 1/04 ・・Arrangements 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

F15D 1/06 ・・by influencing the boundary layer {(use of materials, e.g. to reduce surface friction C09K 3/00)}

F15D 1/065 ・・・{Whereby an element is dispersed in a pipe over the whole length or whereby several elements are regularly distributed in a pipe}

F15D 1/08 ・of jets leaving an orifice (nozzles or outlets with means for mechanically breaking up or deflecting the jet B05B, e.g. B05B 1/26)

F15D 1/10 ・around bodies of solid material

F15D 1/12 ・・by influencing the boundary layer {(use of materials, e.g. to reduce surface friction C09K 3/00)}

F15D 1/14 ・Diverting flow into alternative channels (in hydraulic engineering E02B)