| CALC : Flow : Numbers 021 : Mach Number From Velocity : Air Ideal Gas Or User Defined Speed Of Sound : Calculator
Description : Calculate the Mach number from velocity.
Discussion : The speed of sound is either calculated for air, calculated for an ideal gas or is user defined.
Options :
- Speed of sound calculation : air, ideal gas or user defined
Input Variables :
- γ = Gas Specific Heat Ratio
- A = Speed Of Sound Type
- T = Fluid Absolute Temperature
- V = Fluid Velocity
- ad = Defined Sound Velocity
- mw = Fluid Mole Weight or Molar Mass
Output Variables :
- Ma = Fluid Dimensionless Mach Number
- a = Sound Velocity
Calculation :
If A = 1 : Air
a = 20.047 √( T )
Otherwise If A = 2 : Ideal Gas
a = √( ( 8314.47 γ T ) / mw )
Otherwise If A = 3 : User Defined
a = ad
End of If Block
Ma = V / a
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