Calculating Compressed Air Propulsion: Methods and Formulas for Model Torpedoes

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SUMMARY

This discussion focuses on calculating the feasibility of using compressed air for propulsion in model torpedoes. The key method mentioned is the Venturi Effect, which helps estimate the time it takes for a specific volume of compressed air at a given pressure to escape through a vent of a defined diameter. Michael references Milton Beychok's website for additional insights on the pressurized release of gases, emphasizing the importance of understanding gas dynamics in this context.

PREREQUISITES
  • Understanding of the Venturi Effect in fluid dynamics
  • Knowledge of gas laws, particularly relating to pressure and volume
  • Familiarity with basic physics principles of propulsion
  • Experience with modeling and simulation tools for fluid flow analysis
NEXT STEPS
  • Research Milton Beychok's methodologies for gas dispersion and pressurized release
  • Explore advanced fluid dynamics simulations using tools like ANSYS Fluent
  • Learn about the application of Bernoulli's principle in propulsion systems
  • Investigate the design and optimization of venturi tubes for efficient gas flow
USEFUL FOR

Model torpedo designers, engineers in propulsion systems, and hobbyists interested in fluid dynamics and compressed air applications.

Gepard
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Hi,

I'm currently designing a model torpedo and plan to use compressed air for it's propulsion and am working out if it's feasible.

At the moment I'm trying to calculate how long it takes for X volume of compressed air at Y pressure to leave (IE return to atmospheric pressure) through a hole or vent of Z diameter. I've had a Google but I'm not quite sure how to phrase it but so far the best way I can think of it is to break it down into groups of milliseconds and then use the Venturi Effect to give me a rough idea but it seems a little crude.

Anyone care to suggest a better method? I'm presuming there is some 'magical formula' that I'm not quite getting.

Cheers,

Michael
 
Engineering news on Phys.org
Take a look at Milton Beychok's website here:

http://www.air-dispersion.com/feature2.html

Even though it is labeled for accidental release, it is applicable for the pressurized release to atmosphere of a compressed gas. It's worth your time to read through.
 

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