## What Mach number is supersonic?

Supersonic speed is the speed of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately 343.2 m/s (1,126 ft/s; 768 mph; 667.1 kn; 1,236 km/h).

What is the speed of each mach?

Mach to Miles per hour table

Mach Miles per hour
0 Mach 0.00 mph
1 Mach 761.21 mph
2 Mach 1522.41 mph
3 Mach 2283.62 mph

What is the fastest Mach number?

It’s Official. Guinness World Records recognized NASA’s X-43A scramjet with a new world speed record for a jet-powered aircraft – Mach 9.6, or nearly 7,000 mph.

### How does the Mach number affect a supersonic flow?

There is no upstream influence in a supersonic flow; disturbances are only transmitted downstream. The Mach number appears as a similarity parameter in many of the equations for compressible flows , shock waves , and expansions . When wind tunnel testing, you must closely match the Mach number between the experiment and flight conditions.

Which is lower the speed of sound or the Mach number?

If the mach number is < 1, the flow speed is lower than the speed of sound – and the speed is subsonic. If the mach number is ~ 1, the flow speed is approximately like the speed of sound – and the speed is transonic.

Which is the square of the Mach number?

The square of the Mach number is the Cauchy Number. M 2 = C (3) where. C = Cauchy Number. If the mach number is < 1, the flow speed is lower than the speed of sound – and the speed is subsonic. If the mach number is ~ 1, the flow speed is approximately like the speed of sound – and the speed is transonic.

#### Which is lower the Mach number or the Cauchy number?

The bulk modulus elasticity has the dimension pressure and is commonly used to characterize the fluid compressibility. The square of the Mach number is the Cauchy Number. Subsonic and Supersonic speed. If the mach number is < 1, the flow speed is lower than the speed of sound – and the speed is subsonic.