Question
Download Solution PDFWhat is sonic speed?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Sonic speed:
- When the local flow velocity is equal to the speed of the sound (the speed at which the disturbance propagates) is known as the sonic speed.
- The mach number for the sonic speed is 1.
- It is also known as the disturbance propagates speed through the medium.
Additional Information
Mach number (M):
We can say the speed of sound can be equated to Mach 1 speed. The Mach number due to the local speed of sound is dependent on the surrounding mediums in specific temperature and pressure. Flow can be determined as an incompressible flow with the help of the Mach number. The medium can either be a liquid or a gas. The medium can be flowing, whereas the boundary may be stable or the boundary may be traveling in a medium that is at rest.
M = \(\frac{u}{c}\)
Where, u = Local flow velocity, c = Speed of sound
Its classification:
| Regime | Mach number |
|---|---|
| Subsonic | less than 0.8 |
| Transonic | 0.8 to 1.3 |
| Sonic | 1 |
| Supersonic | 1.3 to 5 |
| Hypersonic | 5 to 10 |
| Hypervelocity | Greater than 10 |
Last updated on May 28, 2025
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