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Airflow through an Axial Compressor
Рет қаралды 144,932
Күн бұрынAirflow through an Axial Compressor screenr.com/nw4
@RF-fi2pt 10 жыл бұрын
Also the youtube video " Mod-01 Lec-02 Axial Flow Compressors and Fans. " , after the 30 minutes explaines very well the velocity triangles. Thank you Roddy Mc Namee and Pradeep :-) .
@cappy6604 4 ай бұрын
great video, cleared up all my doubts. thanks
@TheOnlyRaceEngineer 4 жыл бұрын
You are a saviour Roddy. Best, concise video on Velocity triangles. I have just one question though: Is theta(IN) usually known to the designer?
@RoddyMcNamee 4 жыл бұрын
Daniyal Altaf Baloch , in my opinion the engines operate in a narrow RPM range, therefore the rotational velocity of the blades is also in a narrow range. The axial velocity of the air in is around Mach 0.4. Therefore, the input angle range (theta in) should be identifiable to the designer. The use of variable inlet guide vanes can help in this regard also.
@TheOnlyRaceEngineer 4 жыл бұрын
@@RoddyMcNamee Thanks mate. helped me understand the concept.
@vnarenderreddy1 11 жыл бұрын
Thank u for uploading this video,this cleared so many of my confusions :)
@CarEnthusiastBo 11 жыл бұрын
Would it be possible to make a video on how to apply the Euler's turbine equation to solve these problems? (How to find the blade angles and flow angles)
@karthikp2650 2 жыл бұрын
Friend , I could not understand relative velocity of air. first blade moves towards right the top side air moves towards left,bottom side air moves towards right. could u please explained this.
@RoddyMcNamee 13 жыл бұрын
Type "compression ratio isentropic formula" into google and go to the NASA website. The formula is there.
@Marctrabur 4 жыл бұрын
The vectors C and I have the wrong sense of direction. It's supposed to point in the direction of the circumferential speed (rotation).
@joestuttard1495 4 жыл бұрын
No. The C and I represent the relative velocity of the air relative to the blades rotation, it is correct that they are in opposite directions. Try thinking about being the air, approaching the spinning blades. The imagine the blades stop spinning, and as the air, you're motion must create the relative motion previously seen. (Hope that helps)
@RanjitChattanchal 10 жыл бұрын
The first stage rotor blade rotation direction is given to wards right and why its direction is given to the left while drawing the velocity diagram.?
@RoddyMcNamee 10 жыл бұрын
The velocity diagram shows the velocity of the air and not the blade. It's like when an aircraft moves forward, the direction of the aircraft is forward, but the direction of the airflow over the wing is backwards.
@RanjitChattanchal 10 жыл бұрын
Roddy Mc Namee Thank you sir.I understand.
@cengizcamci469 8 жыл бұрын
+Roddy Mc Namee , there is a problem at the entrance to first rotor and second rotor U=w.r is reversed. When you add U and the relative velocity vectorialy, you are supposed to obtain the absolute velocity. Sum of D and C will be equivalent to B. Sum of J and I will be H. I am afraid the two velocity triangles at rotor inlets may cause confusion. Otherwise I like your presentation.
@nicholaswestwood5791 Жыл бұрын
you actual legend
@veerababubobba9337 4 жыл бұрын
Can I get axial flow compressor speed verses flow curves
@ahmedelsayed4429 4 жыл бұрын
the absolute velocity vector should oppose the relative and blade speed components
@RanjitChattanchal 10 жыл бұрын
Is it the velocity of the fixed blade with respect to the moving blade?
@CompositesNG 3 жыл бұрын
Great Video!
@first2blast 7 ай бұрын
Thank you! I don't get what the red arrow is?! It's opposite the direction of rotation.
@RoddyMcNamee 7 ай бұрын
It's the direction of the airflow due to the rotation. If the blade moves down, the airflow over the blade moves up.
@toddtravis8119 Жыл бұрын
Who designs and builds custom compressor spools?
@Iris0555 3 жыл бұрын
( rotating stator blades) sir is there something like this???can you explain the vanes.......inlet guide vane and other type of vanes!!!
@damoda5000 5 жыл бұрын
thank you so much
@brsild 12 жыл бұрын
why does the thickness of the rotor blades reduce as you go down the axle?
@violentnexus3563 6 жыл бұрын
David O. I think it's because the pressure gets lower.
@complexdevice 4 жыл бұрын
@@violentnexus3563 The pressure gets higher but the velocity gets lower
@GiuliasWorldB 4 жыл бұрын
what's the whirl speed?
@Aviator168 8 жыл бұрын
What if the ram air speed is zero when the airplane is not moving?
@RoddyMcNamee 8 жыл бұрын
+Aviator168 Good question. The higher velocity air at the fan tips will cause a decrease in pressure that will draw the air into the engine.
@Aviator168 8 жыл бұрын
+Roddy Mc Namee An other question. If the stator vanes are directing the air flow in the other direction, would we get a large delta whirl per stage?
@RoddyMcNamee 8 жыл бұрын
Aviator168 The problem with the stator vanes directing the air flow in the other direction is that the angle of attack between the rotor blades and the airflow would become too high and the blades would stall.
@FlexibleBladeTurbine Жыл бұрын
@@RoddyMcNamee I am not sure whether that statement holds. For the angle the air is deflected in the shown direction there exists an angle on the opposite side that will result in the same angle of attack. However the magnitude of the vector will be larger. So drag and impulse are increased and cause unwanted losses in an axial compressor. For the propeller of a ship this effect can be used to increase the axial thrust.