Jet

:For alternative meanings, see Jet (disambiguation).

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A jet is a stream of fluid produced by discharge through an orifice into free space.

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Since gases are compressible fluids, the velocity attained by a jet of gas cannot be determined by Bernoulli's principle. Instead, if one uses adiabatic expansion from P1 to P2 in a properly shaped nozzle, the ideal velocity of a gas jet is:

Related Topics:
Gas - Velocity - Bernoulli's principle - Adiabatic - Nozzle

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:v=8sqrt{(RT_1/z) (1-(P_2/P_1)^z)}

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::R is the common gas constant

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::T1 is the absolute temperature at pressure P1

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::z is egin{matrix}{c_p - c_v over c_p}end{matrix}

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:::cp is the specific heat at constant pressure

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:::cv is the specific heat at constant volume

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:::z = 0.286 for air under 500 °C

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:::z = 0.23 to 0.28 for most combustion products of fuels

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