How Do You Calculate Nozzle Pressure in a Rotating Spray Dry Atomizer?

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SUMMARY

The calculation of nozzle pressure in a rotating spray dry atomizer involves understanding fluid dynamics principles, particularly Bernoulli's equation. In this scenario, with a shaft rotating at 6000 RPM and water being supplied at 5 gallons per minute, the no-flow pressure at the nozzles is approximately 12,000 G. To determine the pressure during flow, one must apply Bernoulli's principle, which accounts for the kinetic energy of the fluid in motion.

PREREQUISITES
  • Understanding of Bernoulli's equation
  • Knowledge of fluid dynamics
  • Familiarity with rotational motion and its effects on fluid pressure
  • Basic calculations involving flow rates and pressure
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  • Study Bernoulli's equation in detail
  • Research fluid dynamics principles related to rotating systems
  • Learn about pressure calculations in flowing fluids
  • Explore practical applications of spray drying technology
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Mechanical engineers, process engineers, and anyone involved in the design and optimization of spray drying systems will benefit from this discussion.

Bill B
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This is a spray dry atomizer problem. I have a shaft that rotates at 6000 ropm. On top of the shaft sits a bowl with two arms that are 180 degrees apart. At the end of each arm is a spray nozzle with a 5/32 inch hole. The length of each arm with the nozzle attached is 12 inches from the center line of the shaft.

If I fill the bowl with water at the rate of 5 gallons a minute with the shaft spinning, what is the pressure at the nozzles?

I calculated a no-flow pressure of about 12,000 G at the nozzles but I don't know how to calculate the pressure with a flowing liquid

Bill B
 
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Typical engineering adage: "Let's Employ Bernoulli". :biggrin:
 

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