Reverse Flow Cavitation (RFC)

Technology Summary

Cavitation is the formation of air or water vapor bubbles in the flow field when the dynamic pressure changes rapidly. Air bubbles, however, are not effective in enhancing the jet performance. When the pressure falls below the vapor pressure, the water flashes into vapor (usually thought of as cold boiling) and forms bubbles. Since the bubbles form around the jet, initially the cluster appears like a doughnut. Downstream from the dynamic pressure change, the entire cross-section is filled with bubbles. When these bubbles reach the target, the jet pressure increases (stagnation pressure) and the bubbles immediately start to disappear (this is called ‘collapse’ or implosion). Experimental and theoretical considerations have shown that when this happens, very high-speed jets (called ‘microjets’) are formed on the target at the point of collapse.

Industries:

• Oil & Gas
• Marine
• Energy

Applications:

• Marine Growth Removal
• Submerged Cleaning
• Washing & Cleaning
  

Features Benefits & Highlights:

• VLN Advanced Technologies’ holds patents on the RFC so it is a secured technology
• Performs in both submerged and open air conditions.Typical drawbacks of cavitation nozzles are that they only work in submerged conditions and are highly sensitivity to stand off distance, both of which are overcome by VLN Advanced Technologies’ RFC
• Increases the performance using the same parameters or one can do the same work with less energy (using lower parameters, i.e. less flow, pressure and smaller equipment when compared to traditional continuous water jets)
• When lower parameters are used, higher operating times are achieved and lower operating costs realized

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