UHP water jetting and calculating kinetic energy

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SUMMARY

The discussion centers on calculating the velocity of water streams exiting orifices under high pressure conditions, specifically at 60 ksi through a 0.015" orifice. Two scenarios are presented: one with a solenoid valve opening while a pump supplies pressure, and another with two valves in operation. A reference is made to a research paper indicating that a 1 mm orifice at 420 MPa yields a velocity of 916 m/s, verified through Computational Fluid Dynamics (CFD) and phase Doppler anemometry. The need for detailed diagrams and further calculations regarding energy dispersion rates is emphasized.

PREREQUISITES
  • Understanding of fluid dynamics principles, particularly laminar flow.
  • Familiarity with high-pressure water jetting systems and their components.
  • Knowledge of orifice flow equations and their applications.
  • Experience with Computational Fluid Dynamics (CFD) simulations.
NEXT STEPS
  • Research the impact of orifice size on flow velocity in high-pressure systems.
  • Learn about energy dispersion rates from nozzles in fluid dynamics.
  • Explore the use of phase Doppler anemometry for measuring fluid velocities.
  • Investigate the effects of high-velocity water streams on human tissue and safety measures.
USEFUL FOR

Engineers, fluid dynamics researchers, and safety professionals involved in high-pressure water jetting applications and their effects on materials and biological systems.

Canagman
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If i compress water to 60 ksi, and push it through a 0.015" sharp orifice, then i have another orifice 2 feet before that sudden open to 0.015", what is the velocity of the stream from each orifice?
 
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You'll have to tell us more before anyone on PF can give you a proper answer .

Please post a more detailed description of the problem and a clear diagram .
 
I have drawn this in metric units.
Scenario # 1 (Solenoid valve 2 opens, pump is supplying noted pressure to water)
What is the velocity of the stream exiting attached nozzle? Power of stream?
Scenario # 2 (Solenoid valve 1 opens...Valve 2 stays open)
What is the velocity of each nozzle? Power of each stream?
And yes, smooth, laminar flow...note that i have not added a system relief just to simplify.

Thank you in advance
question.jpg
 
In addition, is there a specific energy dispersion rate from the nozzle tip to atmosphere?
 
Have you got a drawing of the orifice and nozzle ?
 
no i do not, however i did stumble upon a research paper has the calculation and 420 MPa, 1 mm orifice = 916 m/s this was verified thru CFD and measured using phase Doppler anemometry...that was thru a single orifice...i need look thru the rest of the formulae and work thru the impact of that water stream on a human body...

Regards
 

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