Dear Bill thank you. Your encouraging comments always make me to push the boundaries to make this channel more valuable. I also thank Fredrik extending his help to make this channel to be better without any financial gain. It is rare quality we find these days.
Could you comment on why during the intake (NZ stage) a linear relationship between the drop in pressure and the increase in velocity is observed? From energy conservation: P + 0.5 rho v^2 = constant, shouldn't the drop in pressure result in a proportional increase in the square of the velocity?
Danas Sutula I believe that the y-axis is not in Pa and m/s for pressure and velocity, but rather showing the total enthalpy (energy content). For energy content you have linear relationship, because you are simply converting one form into the other.
A D the nozzle (NZ) and the stator blades fulfill different purposes (even though they are both technically stators). This is achieved through different blade geometry (the images of the blades are not representative of the real geometry). In the nozzle (NZ) you have a blade geometry that changes the speed of the flow, by “stealing” energy from the pressure. The stator blades (SB) on the other hand only redirects the flow, with mirrored flow angles. By mirroring the flow angles, the velocity will have the same magnitude, and in turn also the same pressure as before the stator. The reason for redirecting the flow is to have another rotor blade row that can spin in the same direction as the first, extracting more energy from the flow. Maybe over-course: In "reality" (assuming constant mean radius, but still not factoring losses) I believe the velocity would actually drop somewhat and then increase again in the stator (SB), reaching a minimum just as it "turns" as then it would only have a velocity in the axial direction (meaning you would have a pressure maximum there as well), then as the flow direction changes towards the outlet angle of the stator, the flow would pick up speed and reach the same magnitude as when entering.
Never tell you to "push the subscribe button" though, we ask you to "...please subscribe, and hit the *like* button". ;) Kudos for watching all the way to end though! :D
great video, great explanation
thank you
Thank You.
I was about to ask where you found such a realistic computer voice. Ha! The voice is wonderful. Thanks Seyhan as always.
TheWindGinProject glad to hear! //The voice guy 😁
Encore!
Dear Bill thank you. Your encouraging comments always make me to push the boundaries to make this channel more valuable. I also thank Fredrik extending his help to make this channel to be better without any financial gain. It is rare quality we find these days.
Could you comment on why during the intake (NZ stage) a linear relationship between the drop in pressure and the increase in velocity is observed? From energy conservation: P + 0.5 rho v^2 = constant, shouldn't the drop in pressure result in a proportional increase in the square of the velocity?
Danas Sutula I believe that the y-axis is not in Pa and m/s for pressure and velocity, but rather showing the total enthalpy (energy content). For energy content you have linear relationship, because you are simply converting one form into the other.
wonder the same, also why velocity stays same on green SB but drops on red NZ?
Yes, it makes sense from the context since he specifically mentions energy conversion. Thank you, Fredrik.
A D the nozzle (NZ) and the stator blades fulfill different purposes (even though they are both technically stators).
This is achieved through different blade geometry (the images of the blades are not representative of the real geometry).
In the nozzle (NZ) you have a blade geometry that changes the speed of the flow, by “stealing” energy from the pressure.
The stator blades (SB) on the other hand only redirects the flow, with mirrored flow angles. By mirroring the flow angles, the velocity will have the same magnitude, and in turn also the same pressure as before the stator.
The reason for redirecting the flow is to have another rotor blade row that can spin in the same direction as the first, extracting more energy from the flow.
Maybe over-course: In "reality" (assuming constant mean radius, but still not factoring losses) I believe the velocity would actually drop somewhat and then increase again in the stator (SB), reaching a minimum just as it "turns" as then it would only have a velocity in the axial direction (meaning you would have a pressure maximum there as well), then as the flow direction changes towards the outlet angle of the stator, the flow would pick up speed and reach the same magnitude as when entering.
If i follow what you say, and push the subscribe button, that would unsubscribe me from your channel :(
Never tell you to "push the subscribe button" though, we ask you to "...please subscribe, and hit the *like* button". ;)
Kudos for watching all the way to end though! :D
Bir turk olarak gayet guzel içerikler
Time Lord bişey sorcam madem bu kanal türk kanal neden türkçe değil.bıktım valla ya şu ingilizceden