mach数:式,流量regimes・計算機

Overview

The Mach number ($Ma$) is the ratio of flow velocity to the local speed of sound. It classifies compressible flow regimes and determines when compressibility effects become significant.

Variables

Symbol	Description	Unit
$Ma$	Mach number	—
$v$	Flow velocity	m/s
$c$	Speed of sound	m/s
$\gamma$	Ratio of specific heats	—
$R$	Specific gas constant	J/(kg·K)
$T$	Absolute temperature	K

Formula

$Ma = \frac{v}{c} = \frac{v}{\sqrt{\gamma R T}}$

Calculator

Notes

• Results are approximate and should be verified for critical applications
• Input values should be within reasonable engineering ranges

References

• Original Source