Calculateur de Nombre de Mach Gratuit

Calculez le nombre de Mach d'un objet en mouvement. Déterminez si la vitesse est subsonique, transsonique ou supersonique.

m/s
°C

Mach Number

1.980

Vitesse du son343.4 m/s

Mach Number vs Object Speed

Voir la formule →

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. 01v_sound = 331.3 + 0.606 * 20 = 343.4 m/s
    2. 02M = 680 / 343.4
    3. 03M = 1.980
    4. 04The aircraft is supersonic (M > 1)

    Questions Fréquentes

    What happens at Mach 1?

    At Mach 1, a shock wave forms around the object, producing a sonic boom. This is called the sound barrier.

    Does the speed of sound change with altitude?

    Yes. Temperature decreases with altitude, so the speed of sound also decreases, meaning the same airspeed gives a higher Mach number at altitude.

    What is the fastest manned aircraft?

    The SR-71 Blackbird reached about Mach 3.3. The X-15 experimental aircraft reached Mach 6.7.

    Apprendre

    Understanding Newton's Laws of Motion

    Calculatrices Associées

    Doppler Effect Calculator

    Calculate observed frequency with relative motion.

    Velocity Calculator

    Compute velocity from distance and time.

    Sound Wavelength Calculator

    Calculate sound wavelength with temperature.