The Mach number, denoted as M, is a dimensionless quantity used to describe the speed of an object or fluid flow in relation to the speed of sound in the surrounding medium. Specifically, it’s commonly used to characterize supersonic and hypersonic flows, where the speed of the object or flow exceeds the local speed of sound.
- Specific heat ratio (𝛾)
- Ratio of total pressure to the static pressure (p0/p)
- Mach number (M)