- #1

Urmi Roy

- 753

- 1

1. when M=1, dA=0...

**what does this mean**? Does it imply that if we have a converging (subsonic) nozzle with its exit mach no,say 0.8, and then direct the flow to a constant area tube, then we

*have to*attain M=1?

2. When we know the length of a duct, and the entering mach no, can we predict from only this information whether there will be a shock or not? (i.e

**what is the minimum info we require to predict whether there will be a shock or not**?).

3. Is it true that while a subsonic flow can be continuously accelerated to supersonic flow, the converse (i.e continuous deceleration of a supersonic flow to subsonic speed) is not true and has to take place via a shock wave?(but I thought this was possible in a diverging diffusor...

Thanks a lot.