(adsbygoogle = window.adsbygoogle || []).push({}); Newby de laval nozzle ???

I am experimenting with de laval nozzles. I am trying to make a nozzle that operates at room temprature and moderatly low pressure.

This is the equation I have found for calculating area of throat.

At = (q / Pt) x SQRT[ (R' x Tt) / (M x k) ]

At= area of throat

q = gas flow rate

Pt= pressure at throat

R'= Universal gas constant x molecular weight

Tt= Temp at throat

M= gravity constant

k= gas specific heat ratio

How do I calculate the volocity of the gas that exits the throat? What is an ideal volocity,

is it relative to the speed of the rocket? Is it possible to work the above equation and end up with a low and therefor ineffective volocity? Do I have to set my pressure and flow rate

based on a target gas exit volocity?

Thanks for your time

jslade

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# Newby de laval nozzle ?

Can you offer guidance or do you also need help?

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