EngiRef / Fluids Engineering Formula
Mach Number
Mach Number: Ratio of flow velocity to speed of sound. A Fluid Dynamics formula in fluids engineering. Variables Ma, v and a, each with SI and imperial units.
Fluid Dynamics
Specification
- Name
- Mach Number
- Discipline
- fluids
- Category
- Fluid Dynamics
- LaTeX
- Ma = \frac{v}{a}
- Description
- Ratio of flow velocity to speed of sound
- Conditions
- Ma < 0.3 incompressible, Ma > 1 supersonic
- Can solve for
- Ma, v, a
- Tags
- mach, number, supersonic, compressible, sound
Variables
| Symbol | Name | Unit | Si Unit | Imperial Unit |
|---|---|---|---|---|
| Ma | Mach Number | - | - | - |
| v | Flow Velocity | m/s | m/s | ft/s |
| a | Speed of Sound | m/s | m/s | ft/s |
Common questions
- What is the Mach Number formula?
- Ratio of flow velocity to speed of sound. It sits under Fluid Dynamics, Fluids engineering in the EngiRef reference.
- What do the symbols in the Mach Number formula mean?
- In Mach Number, Ma is mach number; v is flow velocity in m/s; a is speed of sound in m/s.
- When does the Mach Number formula apply?
- Mach Number holds under this condition: Ma < 0.3 incompressible, Ma > 1 supersonic.