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Air Jet cone angle

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Francis

Francis

Mechanical
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Apr 12, 2001
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I need to calculate the cone angle of the air jet coming out of a hole on the circumference of a pressurized air pipe. Please tell me a source from where I can get the relevant formula or see a sample calculation.
Thanks.
 
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Perry's Chemical Engineers Handbook has a section on "Turbulent Free Jets" in chapter 5. The jet divergence angle, alpha, is given as 20° for distances less than 100 diameters from the orifice. The correlation given is valid for distances varying from 7 to 100 jet diameters, with initial jet velocities from 2.5 to 50 m/s.
 
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