Mining or in situ disintegration of hard material – Processes – Directly applying heat or vibration
Patent
1980-12-12
1983-06-21
Purser, Ernest R.
Mining or in situ disintegration of hard material
Processes
Directly applying heat or vibration
134 1, 175 67, 239101, 239102, 299 17, E21C 3712
Patent
active
043890717
ABSTRACT:
Process and apparatus for enhancing the erosive intensity of a high velocity liquid jet when the jet is impacted against a surface for cutting, cleaning, drilling or otherwise acting on the surface. A preferred method comprises the steps of forming a high velocity liquid jet, oscillating the velocity of the jet at a preferred Strouhal number, and impinging the pulsed jet against a solid surface to be eroded. Typically the liquid jet is pulsed by oscillating the velocity of the jet mechanically or by hydrodynamic and acoustic interactions. The invention may be applied to enhance cavitation erosion in a cavitating liquid jet, or to modulate the velocity of a liquid jet exiting in a gas, causing it to form into discrete slugs, thereby producing an intermittent percussive effect.
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Johnson, Jr. Virgil E.
Lindenmuth William T.
Hydronautics, Inc.
Purser Ernest R.
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