Mach number and its importance

Mach number and its importance:-

 


The ratio of the velocity of the fluid in an on distributed steam to the velocity of the sound wave is known as Mach number. it gives us important information about the type of flow. In general, the flow of a fluid is diverted into the following four types depending upon the Mach number.

1) when the Mach number is less than Unity, the flow is called a subsonic flow.
2) when the Mach number is equal to Unity the flow is called a Sonic flow.
3) when the Mach number is between 1 and 6 the flow is called a Supersonic flow.
4) when the Mach number is more than 6 the flow is called hypersonic flow.




Stagnation point:-

In the flow where the velocity of the fluid is zero, called a stagnation point.

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