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Finding the Mach Number of an object moving at V (km/h) in air

ÀÛ¼ºÀÚ Uploader : doturak ÀÛ¼ºÀÏ Upload Date: 2023-07-04º¯°æÀÏ Update Date: 2023-07-05Á¶È¸¼ö View : 120

Find the Mach number M (Mach) of an object moving through air at a velocity V (km/h).

The specific heat ratio of air is ¥ã ( =1.4 for air), the specific gas constant for air is R (J/kg*K), and the  static air temperature is T (¡É).

M = V/Va

Va : the speed of sound

Va = sqr(¥ã*R*K) = sqr(¥ã*R*(273+T))

M = V*(1000/3600)/sqr(¥ã*R*(273+T))

  = (1/3.6)*V/sqr(¥ã*R*(273+T))

*** Âü°í¹®Çå[References] ***

https://en.wikipedia.org/wiki/Mach_number
M = (1/3.6)*V/sqr(¥ã*R*(273+T))
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