Calculation of actual spray angle and coverage

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SUMMARY

The discussion focuses on calculating the actual spray angle and coverage for nozzles in an evaporative cooling tower. The user seeks to determine the impact of drag forces on the coverage area due to the higher velocity of water compared to gas in a co-current flow. Key parameters include droplet size, and the velocity and density of both gas and water. The user emphasizes the importance of vendor tests for accurate spray angle and droplet size data.

PREREQUISITES
  • Understanding of fluid dynamics, particularly drag forces in co-current flow.
  • Knowledge of spray nozzle specifications and performance metrics.
  • Familiarity with evaporative cooling tower design principles.
  • Mathematical skills for calculating spray coverage based on nozzle parameters.
NEXT STEPS
  • Research fluid dynamics principles related to drag forces in co-current flows.
  • Investigate spray nozzle performance testing methodologies and standards.
  • Learn about evaporative cooling tower design and optimization techniques.
  • Explore mathematical modeling for calculating spray coverage and angles.
USEFUL FOR

Engineers and designers involved in cooling tower systems, fluid dynamics researchers, and professionals optimizing spray nozzle performance in industrial applications.

Gollegun
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Hey,

I am attempting to figure out the optimal nozzle placement for an evaporative cooling tower. Now, calculating the theoretical coverage of each nozzle is obviously not a problem since I know the spray angle of the nozzles. However, since the water is injected at a much higher speed than the gas (Co-current), I am assuming that drag forces will play an important part and the actual coverage of each nozzle will be smaller.

I would like to be able to calculate the actual coverage of the nozzle at any given distance from it.

I know the size of the droplets, the velocity and density of both the gas and the water.

Any help on how to solve this mathematically is greatly appreiated
 
Engineering news on Phys.org
I don't know anything about cooling towers but I'm wondering how do you know the spray angles and drop sizes? I did some spray coverage stuff for pressure control in reactor containment buildings and it was all based on spray nozzle tests done by the nozzle vendor.
 

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