Suck, Squeeze, Bang, Blow
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I don't want to start an argument here, especially if I'm wrong, but I stand by my original post. I checked up on this today in college, and unless my notes/lecturer/Rolls Royce web site (unfortunately this has been updated in the last week and the apprpopriate graph removed) are all wrong, I beleive my description to be correct.
The compressor consists of many "stages". Each stage is one row of rotors and one row of stators. As I said before the rotors speed the air up and the stators then slow it down to it's initial speed, while both compress it(increasing the pressure).
I also don't believe my post contradicted itself. The rotors DO speed up the air, but after the effect of the stators on that air (and there are an equal amount of rotors and stators) the overall result is NO increase in speed through the compressor.
The fact that the air comes out the bck at a very high speed is due to what happens to it after the compressor (the combustion and a slight convergent lip to the very back of the exhaust/jet pipe).
If I knew how to do it I would scan in the relevant graph and diagrams that would illustrate this, but I don't I'm afraid.
I hope this doesn't all sound like an attempt to start a fight over this, part of the reason for writing this reply is so that someone who knows more about this can tell me if I'm way off the mark, as for obvious reasons I need to know if I am. Maybe we should move this to the Technical Forum so the clever peopel can settle the argument!!!
Cheers
The compressor consists of many "stages". Each stage is one row of rotors and one row of stators. As I said before the rotors speed the air up and the stators then slow it down to it's initial speed, while both compress it(increasing the pressure).
I also don't believe my post contradicted itself. The rotors DO speed up the air, but after the effect of the stators on that air (and there are an equal amount of rotors and stators) the overall result is NO increase in speed through the compressor.
The fact that the air comes out the bck at a very high speed is due to what happens to it after the compressor (the combustion and a slight convergent lip to the very back of the exhaust/jet pipe).
If I knew how to do it I would scan in the relevant graph and diagrams that would illustrate this, but I don't I'm afraid.
I hope this doesn't all sound like an attempt to start a fight over this, part of the reason for writing this reply is so that someone who knows more about this can tell me if I'm way off the mark, as for obvious reasons I need to know if I am. Maybe we should move this to the Technical Forum so the clever peopel can settle the argument!!!
Cheers
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Very interresting discussion.
Billy-the first stages DO speed up the air up in order for it to "catch up" with the air which has entered before it thus creating the pressure we want before the air enters the chambers.
yes?
no?
someone come with a better explanation-I dare you!!!!
DT
Billy-the first stages DO speed up the air up in order for it to "catch up" with the air which has entered before it thus creating the pressure we want before the air enters the chambers.
yes?
no?
someone come with a better explanation-I dare you!!!!
DT
