Air velocity in a vacuum generator

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At what speed does the air flow through a vacuum generator?
The air velocity in a vacuum generator reaches a value greater than Mach 3.

  • Mach 1 = speed of sound (340,29 m/s in dry air, at sea level with a temperature of 21°C)
  • Mach 2 = twice the speed of sound
  • Mach 3 = three times the speed of sound
  • etc.