Fluid sprinkling – spraying – and diffusing – Processes – Vibratory or magneto-strictive projecting
Patent
1975-09-30
1977-10-04
Love, John J.
Fluid sprinkling, spraying, and diffusing
Processes
Vibratory or magneto-strictive projecting
239101, 239102, 239DIG3, 137835, B05B 108
Patent
active
040520021
ABSTRACT:
A liquid spray is characterized by a liquid jet which is cyclically deflected at a high frequency such that it breaks up into a fan-shaped spray pattern in which the fluid distribution and droplet size can be controlled. Jet deflection is accomplished with energy in the pressurized liquid itself. In a preferred embodiment, the spray is produced by a fluidic oscillator, of the type having a flow-reversing interaction region terminated by an outlet throat from which outlet walls diverge, configured to establish a static operating pressure at the upstream end of the interaction region which is positive relative to the pressure in the outlet region. When the power jet is directed along one outlet wall it merges with working fluid outflow from a control passage communicating from that outlet wall to the upstream end of the interaction, whereas the opposite control passage remains filled with operating fluid because of the positive interaction region pressure, with the result that neither working nor ambient fluid is ingested into the interaction region from the outlet region. Oscillation is produced by the fact that the pressure in the control passage conducting outflow is less than the pressure in the other control passage, the differential pressure deflecting the jet and thereby reversing the pressure conditions in the control passages. The configuration for achieving this operation is characterized by: an outlet throat sufficiently narrow to permit the egressing oscillating jet to continuously isolate the interaction and outlet regions; and a short interaction region. The oscillator is capable of delivering liquid sprays having uniform spatial distribution and uniform droplet size and is also operable with air or fluidized solid working fluid. Oscillator frequency depends upon size of the oscillator and the applied pressure.
REFERENCES:
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Bray, Jr. Harry C.
Stouffer Ronald D.
Bowles Fluidics Corporation
Love John J.
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