Introduction to Fluid Machines and Compressible Flow by Prof. S.K. Som,Department of Mechanical Engineering,IIT Kharagpur.For more details on NPTEL visit nptel.ac.in
if there is no energy gain in diffuser then how there would be the rise in pressure? pressure is also one form of energy which rises temperature of fluid can you explain me sir?
Pasu pathynathan.B despite the loss of total pressure in the diffuser due to viscosity, the increase in area in the diffuser reduces the air velocity, therefore the dynamic pressure is also reduced but the static pressure is increased. The goal of any kind of compressor is to increase the static pressure .
as the area increases pressure reduces (P=force/area) i cant get the correct working of diffuser how the pressure is gained CAN YOU PLEASE EXPLAIN ME SIR?
Yes u r correct. If area increases pressure decreases. Where as in this case, there is conversion of kinetic energy into pressure energy because of decrease in velocity.
The pressure measuring instrument is static relative to the fluid flow ie. the fluid and the pressure measuring instrument are assumed to move together.
As per boundary layer theory velocity of the fluid becomes zero at the wall, where pressure measuring instruments are installed, because of zero velocity pressure will be max as per bernouli theory. That's why the name
kishan chauhan As area increase, velocity decrease according to continuity equation and pressure is inversely proportional to velocity hence pressure is directly proportional to area
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He is one of the bests
..proved time and again
you are so good teacher , ever in my life sir....
I m so glad....
Έγραψα 92 προωθητικά ΙΙΙ χάρης εσένα, αγαπητέ Ινδέ καθηγητά, Ευχαριστώ!
awesome lecture professor thanks a lot ...........may god bless you
One of the best proffesor
Just watch the full video. Worth the time😃
awesome explaination
best of all nptel lectures
thank u sir good work
@2641, the recirculatoryflow should be opposite as fluid flows to negative pressure
We must preserve this treasure !!!
nice need more
thank you sir
Thank you sir.....
professor suddenly became old ?????
nice
Bernoulli equation require modification when applied to compressible flow.
I can not understand that, velocity of impeller tip (V2) is supersonics, than,How vaneless diffuser decrease velocity?
if there is no energy gain in diffuser then how there would be the rise in pressure? pressure is also one form of energy which rises temperature of fluid
can you explain me sir?
Pasu pathynathan.B despite the loss of total pressure in the diffuser due to viscosity, the increase in area in the diffuser reduces the air velocity, therefore the dynamic pressure is also reduced but the static pressure is increased. The goal of any kind of compressor is to increase the static pressure .
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Can you learn about centrifugal blower
Doesn't continuity eqn and bernoulli's principle apllies only for incompressible fluids
Sahi kaha
as the area increases pressure reduces (P=force/area) i cant get the correct working of diffuser how the pressure is gained
CAN YOU PLEASE EXPLAIN ME SIR?
Your logic is true in case of solid not in fluids
Gud lecture with reasonable justifications
Gud lecture with reasonable justifications
Yes u r correct. If area increases pressure decreases. Where as in this case, there is conversion of kinetic energy into pressure energy because of decrease in velocity.
The stagnation temperature explaination isn't correct.
+Vinay Rawat sahi explanation whatsapp kar! :D
why is the pressure called static pressure if the fluid is moving?
Tejas Desai here dynamic word come from
static head and dynamic head, static head provided by pressure while dynamic head by velocity
The pressure measuring instrument is static relative to the fluid flow ie. the fluid and the pressure measuring instrument are assumed to move together.
static pressure is the pressure experienced when air molecules interact and collide with each other
As per boundary layer theory velocity of the fluid becomes zero at the wall, where pressure measuring instruments are installed, because of zero velocity pressure will be max as per bernouli theory. That's why the name
intro sound lik intersteller theme music
PLZ tell in Hindi
the tutorial is fine but needed the translation in Spanish, because the market many Latinos (imprtantisimos)
Did you try RUclips subtitles , you might get one in Spanish.
I am making jet engine
pressure is inversely proportional to area not directly
kishan chauhan As area increase, velocity decrease according to continuity equation and pressure is inversely proportional to velocity hence pressure is directly proportional to area
+harsh khandelwal i second on that
@@harshkhandelwal5971 for subsonic flow