- #1
stephane
- 18
- 0
Hi all,
I have really a confusion between subsonic and supersonic speed evolution when the area decrease or increase
I have a problem to understand why in supersonic regime the velocity evolution in a nozzle is adverse of the subsonic regime?
for example in subsonic regime, when the area decrease so the velocity increase (because the static pressure increase) this analyse is logic for me,
In supersonic the density is not constant (so we have ruA=constant), is the density decrease when the area decrease? if yes can you give me an explanation please (because for me if the volume or the area decrease the density of my fluid must increase!?)
Another question why Mach number equal to 1 in the nozzle (when the area is minimum ?
I have really a confusion between subsonic and supersonic speed evolution when the area decrease or increase
I have a problem to understand why in supersonic regime the velocity evolution in a nozzle is adverse of the subsonic regime?
for example in subsonic regime, when the area decrease so the velocity increase (because the static pressure increase) this analyse is logic for me,
In supersonic the density is not constant (so we have ruA=constant), is the density decrease when the area decrease? if yes can you give me an explanation please (because for me if the volume or the area decrease the density of my fluid must increase!?)
Another question why Mach number equal to 1 in the nozzle (when the area is minimum ?