Abstract:
A fluidic flow meter comprising a fluidic oscillator having an oscillation chamber, a power nozzle for issuing a jet of fluid into the oscillation chamber, an outlet for issuing fluid from the oscillation chamber. A bendable fiber optic wave guide loop has a section adapted to lose light, as a result of flexing or bending, is mounted in a flow path in the oscillation chamber and subjected to oscillatory flow of the fluid. Light is injected into one end of the fiber optic wave guide and a detector senses the oscillatory loss of light in the fiber optic wave guide as a measure of fluid flow through the fluidic oscillator.
Abstract:
17 vide partiel produit dans le passage d'admission d'une chambre à tourbillon est utilisé pour déplacer le liquide d'un compartiment à un autre afin de maintenir le niveau de liquide dans au moins l'un des compartiments en deçà d'un niveau prédéterminé du liquide dans l'autre compartiment. Dans un mode de réalisation, l'unité de tourbillon (14) ou un autre organe d'aspiration développe un vide partiel à la hauteur maximale d'un tube de syphon (8) s'étendant entre les deux chambres, le vide aspirant le fluide des deux ou au moins de l'une des deux chambres vers le sommet du tube (8) amorçant ainsi l'effet de syphon. Une pompe de mines (6) possédant une pression négative insuffisante pour faire monter le liquide à la hauteur maximale du tube de syphon (8) est utilisée pour amener le liquide à une charge et, de concert avec l'unité de tourbillon (14), pour établir le vide partiel requis par l'amorçage de l'effet de syphon. L'unité de tourbillon (50) peut également être logée dans le tube de syphon (52, 54) et peut être utilisée comme pompe pour amener le liquide d'un compartiment seulement à un autre ou, dans un autre mode de réalisation, comme syphon pour déplacer le liquide dans les deux directions pour maintenir les niveaux du liquide dans les deux récipients à une différence de hauteur prédéterminée l'un par rapport à l'autre.
Abstract:
A two-stage liquid spray device having an outlet region with an island (41) and an exit aperture (47) and a fluidic oscillator (33) driving said outlet region. The improvement for the spray device is operable at a low pressure to achieve full-area coverage with substantially uniform droplets and wherein all of the spray droplets land on the desired work surface and do not bounce. The fluidic oscillator includes an oscillation chamber (33), a power nozzle (31) for introducing a jet of liquid from a source into the oscillation chamber. The oscillation chamber is configured to produce a pair of alternating control vortices which substantially preclude wall attachment of said jet traversing said oscillation chamber, thus avoiding a heavy endedness in the oscillatory jet. An outlet from the oscillation chamber to the outlet region, whereby the jet rhythmically sweeps in end pulses to each side of the island and forms a sheet at the exit aperture. The sheet is rhythmically waved or swept in the ambient air to form the uniform droplets. A transverse slot defines the lateral boundary of the sweeping sheet.
Abstract:
A vehicle nozzle system having a source of washer liquid (14) under pressure, a fluidic oscillator (11) comprising a housing and a fluidic insert having a power nozzle, an oscillation chamber (oc) having an upstream end (pn) coupled to the power nozzle for issuing a jet of washer liquid into the oscillation chamber and a downstream end having an outlet aperture (oc'') for issuing a jet of wash liquid to ambient, and side and top and bottom walls, an oscillation inducing silhouette in the oscillation chamber for causing said jet of wash liquid to rhythmically sweep back and forth between the sidewalls in the oscillation chamber. Top and bottom walls of the oscillation chamber first diverge for a predetermined distance in a downstream direction and then convert towards each other through said outlet aperture. This enables the deflection angle to be adjusted for different vehicles and applications by changes to the fluidic insert without changes to the housing.
Abstract:
A method and apparatus of maximizing transfer of thermal energy to or from an oscillating or swept air jet (10) propagated over a windshield (21). The air jet is projected through short distances in ambient from a nozzle (11) properly aimed at said windshield. The wavelength μ of the oscillating or swept jet is caused to be greater than the nozzle distance from windshield and smaller than the length extent of windshield in the direction of air jet propagation across it whereby there is less of loss or gain of thermal energy from said air jet in the space between said nozzle and said windshield and a maximum transfer of thermal energy between the windshield and air jet by lessening the thickness of any insulating boundary layer.
Abstract:
An air outlet for a passenger compartment of a vehicle has a duct forming a jet of air, a pair of lateral sidewalls (10), bounded by the top (T) and bottom (B) walls, diverging (12, 13, 15, 16 and 17) from each other from their upstream ends to their downstream ends at a rate sufficient to preclude a stable wall effect and for causing aperiodic oscillation of the jet into the passenger compartment of said vehicle. Various means (21, 22, 25, 31, 32 and 35) are disclosed to further destabilize the wall effect.
Abstract:
A low NOx gas burner for heating objects having a supply of gas under pressure (30) which is to be mixed to achieve a combustible mixture, gas flow line (32) connecting to said burner to said supply, a burner means (34) for mixing air with said fluid fuel to achieve said combustible mixture, characterized by said burner means includes one or more jet forming means for issuing one or more jets of said gas having a given cross-sectional area and sweeping said one or more jets of gas in ambient air downstream of said burner means to mix air with said gas and achieve said combustible mixture a distance (D) spaced from any physical structure of said burner means whereby a flame front (FF) of burning combustible mixture has a broad shape and is spaced a predetermined distance from said burner.
Abstract:
Control of temperature of air efflux from an air outlet (13) is by control of the oscillation of a fluidic oscillator. Directionality of efflux is by control of nibs (14L, 14R) at the outlet (13).
Abstract:
An air discharge nozzle and method for vehicles having a grill (20) which has a high degree of visual opacity to enhance design aesthetics, low impedance to air flow so that the face velocity remains high, and which does not significantly affect directionality of the air as imparted to the air stream by an upstream control mechanism. The grill (20) is comprised of a monolayer of polygonal cells in an array of cells. The upstream directionality control mechanism includes, in a preferred embodiment, an open intruder frame (30) having converging walls so that the cross-sectional area of the total shadow area of the frame projected on a plane normal to the axial center is essentially constant.