8.1声速与马赫数 Velocity of Sound and Mach Number 1. Velocity of Sound( or Sonic velocity)(声速) pressure wave travels through a mediuhmall It is the velocity at which infinitesimally si 0o For adiabatic process For ideal gas〔对于理想气体) 2s、kp=vkRT8.1 声速与马赫数 Velocity of Sound and Mach Number 1. Velocity of Sound (or Sonic Velocity) (声速) It is the velocity at which infinitesimally small pressure wave travels through a medium. For adiabatic process For Ideal Gas (对于理想气体) s s v p v p a ( ) ( ) 2   = −   =  a = kpv = kRT