Supersonic air passing through a divergent duct causes the
- pressure to increase, velocity to increase.
- pressure to increase, velocity to decrease.
- pressure to decrease, velocity to increase.
Explanation from PART66Online
Supersonic flow behaves oppositely to subsonic flow: in a divergent (expanding) duct, supersonic air continues to accelerate, so velocity increases while static pressure falls. This is why supersonic propelling nozzles are divergent to gain thrust, whereas a subsonic divergent duct would slow the flow and raise pressure.
S
sauravkatwal asked · 5 Oct 2013
Isn't in supersonic air flow, everything is vice versa?
Community Comments (2)
P
PART66Online
5 Oct 2013
Yes, sure.
Divergent duct = expanding duct, right?
If airflow is subsonic, in divergent duct it decelerates and pressure increases.
But here we have supersonic airflow, so vice versa.
Divergent duct = expanding duct, right?
If airflow is subsonic, in divergent duct it decelerates and pressure increases.
But here we have supersonic airflow, so vice versa.
S
sauravkatwal
5 Oct 2013
oh! thanks! i misunderstood with convergent :)
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