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FUNDAMENTALS

ThermodynamicsSixth Edition

SONNTAG BORGNAKKE VAN WYLEN

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To maximize the mass flow rate of air through a given nozzle, which properties

should I try to change and in which direction, higher or lower?

The mass flow rate is given by Eq.16.41 and if we have = 1 at the throatthen Eq.16.42 gives the maximum mass flow rate possible.

Max flow for:

Higher upstream stagnation pressure

Lower upstream stagnation temperature

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