In a choked nozzle, velocity increases, and
- density decreases.
- pressure decreases.
- pressure increases.
Explanation
When a nozzle is choked the flow reaches sonic speed and, as it continues to expand and accelerate, the gas density falls. Pressure also drops rather than rising, so density decreasing is the correct accompaniment to the rising velocity.
add99 asking:
Doesn't pressure decrease with an increase in velocity?
Community Comments (6)
R
rizkaramat Posts: 1 23.04.2012 / 18:25
in the case of a choked nozzle the velocity of air cannot excceed that of sonic speed there after that point the choked nozzle gets thrust by increased pressure inside the nozzle
I
imrannsk Posts: 2 03.05.2012 / 01:53
In all the cases, velocity increases with decrease in pressure. Remember the concept of 'lift' in 'aerofoil'... the upper portion has reduced pressure due to which the velocity increases and more force is created than the bottom portion. This is an example just to get you into the concept of Pressure & Velocity relation.
I
imrannsk Posts: 2 03.05.2012 / 01:55
So as you have written above, the answer stated above is Wrong.
A
avionics Posts: 9 27.02.2017 / 10:10
In a choke nozzle M=1 at the throat area.....
In a choke nozzle with subsonic velocity gas intake, the velocity of gas is M=1 at the choke point....nevertheless this is not the case if gas intake is already at sonic velocity upon entering the nozzle..And under sonic gas intake the speed at the throat might be higher sonic speed, M>1.
To back it up you may find it in convergence-divergent topic with compressible and incompressible air..
In a choke nozzle with subsonic velocity gas intake, the velocity of gas is M=1 at the choke point....nevertheless this is not the case if gas intake is already at sonic velocity upon entering the nozzle..And under sonic gas intake the speed at the throat might be higher sonic speed, M>1.
To back it up you may find it in convergence-divergent topic with compressible and incompressible air..
J
Jordi Posts: 198 06.07.2020 / 14:21
so is this answer correct?
D
Diverdeep Posts: 8 17.05.2023 / 23:01
before the choke always increase
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