| FOR YOUR NEEDS IN JET DEVELOPMENT AND TESTING |
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| DYNAFLOW, INC. ® has extensive experience in basic and applied research, development, testing, and fabrication of water jet technology and systems.
Our capabilities in this area include:
- Custom nozzle design and fabrication
- Specialized prototype systems
- Test and evaluation
- Erosion testing of materials
- Experimental, numerical, applied, and fundamental studies
- Scale model design and testing
- Consulting
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CAVIJET® |
| STRATOJET® |
| SERVOJET® |
| DYNASWIRL® |
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| CAVIJET® Cavitating Liquid Jets |
Sandstone Cut by a CAVIJET® Cavitating Water Jet |
The CAVIJET® technology deliberately induces cavitation in front of the nozzle to produce extremely high, very localized stresses on a surface due to bubble cavity collapse in the jet stagnation region. This provides:
- Enhanced erosive power for cutting and cleaning
- Reduced pumping power requirements
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| STRATOJET® Self- Resonating Jets |
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The STRATOJET® technology utilizes a passive acoustic resonance created by flow interaction with the nozzle and upstream chambers to induce the formation of large vortical ring cavities which collapse on the target. These jets:
- Employ no moving parts
- Greatly enhance jet erosive power resulting in reduced pumping power requirements
- Cavitate at high ambient pressures and are thus particularly effective in applications such as deep hole drilling
- Acoustic resonance is achieved by matching the turbulent jet natural frequency with that of the specially designed nozzle assembly, resulting in organized vortical ring structures.
>>> See Write-up from US Dept. of Energy |
Rings of cavitation from a STRATOJET® |
| SERVOJET® Interrupted Jets |
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The SERVOJET® nozzle employs passive acoustic resonance to create a series of high speed liquid drops, slugs, or vortex rings. This nozzle has several advantages:
- The SERVOJET® provides enhanced erosive power for both submerged and nonsubmerged (in-air) applications and employs no moving parts with minimal internal losses
- Creates water hammer type pressure pulses due to drop impact
- Removes various layers of surface contamination, coatings, or paint without damage to underlying surfaces
- Creates cyclic short duration loading at high frequencies
- Produces larger outflow velocities and impact areas than continuous jets
Successful applications include:
- Aircraft paint and coating removal
- Ship hull cleaning
- Stripping aircraft carrier deck nonskid coatings
- Scale and rust removal
- Asbestos removal
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Stobe Photo of a SERVOJET® Showing Formation of Slug |
| DYNASWIRL® Cavitating Swirling Jets |
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The DYNASWIRL® nozzle imports a rotating flow to create a very low pressure at the center of the vortex core which cavitates. This cavitation can form a helicoidal shape with a vortex breakdown near the orifice. This nozzle has several advantages:
- It achieves cavitation at very high cavitation numbers (i.e. very low jet speed or very high ambient pressure)
- Produce a helical cavitation mode in addition to vortical ring cavities
- Produces larger cavitation surface area
- Generates very fine bubble
Successful applications include:
- Disinfection of micro-organisms
- Oxidation of chemical contaminants
- Water aeration
DFI Patents - Includes Patents on Jets |
Stobe Photo of a DYNASWIRL® Showing Formation of Corkscrew Shape of Cavity
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References:
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- See Write-up from US Dept. of Energy
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