Calculateur de Nombre de Mach — Formule

Mach Number

The Mach number is a dimensionless ratio comparing an object's speed to the speed of sound in the surrounding medium.

Formula

M = v / v_sound

  • M < 1: subsonic
  • M = 1: sonic (speed of sound)
  • M > 1: supersonic
  • M > 5: hypersonic

    • Exemple Résolu

    An aircraft flying at 680 m/s in air at 20 degrees C.

    1. v_sound = 331.3 + 0.606 * 20 = 343.4 m/s
    2. M = 680 / 343.4
    3. M = 1.980
    4. The aircraft is supersonic (M > 1)