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nudelhirsch
Topic Author
Posts: 1371
Joined: Sun Oct 12, 2003 6:20 am

Air Intakes On A330 Engine?

Thu Feb 10, 2005 3:00 pm

As I am sure these have a point...what exactly are those intakes on the pylon for?

Pic:

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Photo © Magnus Trippler




Thanks guys...
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troubleshooter
Posts: 420
Joined: Mon Feb 07, 2005 5:22 am

RE: Air Intakes On A330 Engine?

Thu Feb 10, 2005 6:17 pm

It´s just a guess. They look like precooler outlets. Fan air is used to cool down the hot compressor bleed air which is used for cabin pressurisation and air conditioning. The precooler is located inside the engine pylon.

I`m not working on the A330 so don´t kick me if I´m wrong...
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nudelhirsch
Topic Author
Posts: 1371
Joined: Sun Oct 12, 2003 6:20 am

RE: Air Intakes On A330 Engine?

Thu Feb 10, 2005 6:27 pm

Dude, I will kick you if this is wrong!
Kidding...

Thanks fellow Deutscher on that info, makes sense to me. I am just a business major who can tell you why operating any AC is too expensive...lol
Putana da Seatbeltz!
 
airplay
Posts: 3369
Joined: Sat Oct 25, 2003 1:58 am

RE: Air Intakes On A330 Engine?

Fri Feb 11, 2005 12:18 am

Yep...pre-cooler, cooling air discharge.

http://members.shaw.ca/airplay1/precool.jpg
 
troubleshooter
Posts: 420
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RE: Air Intakes On A330 Engine?

Sat Feb 12, 2005 6:36 am

No kick today, mate. Lucky day for me.  Wink/being sarcastic
This job sucks!!! I love this job!!!
 
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HAWK21M
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Joined: Fri Jan 05, 2001 10:05 pm

RE: Air Intakes On A330 Engine?

Sat Feb 12, 2005 6:36 pm

Nice Sketch,Makes understanding easier.
Thanks.
regds
MEL
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Santhosh
Posts: 543
Joined: Sun Sep 16, 2001 5:14 am

RE: Air Intakes On A330 Engine?

Sun Feb 13, 2005 1:29 am

Can any one please explain me in detail on how the precooling system works in relation to the sketch?

Thanx
George
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SlamClick
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RE: Air Intakes On A330 Engine?

Sun Feb 13, 2005 2:01 am

"Bleed" air off the engine is tapped off at some stage into the compressor section. It is obviously "compressed" and therefore hot.

For most pneumatic uses we want the higher pressure of the bleed air but not necessarily the heat. (Exception is anti-icing, but that is a whole other discussion.)

Fan discharge air is just outside air that went into the outer part of the engine air intake and thus, is being ducted around the engine by the first stage fan, in a fan shroud.

Some of this fan discharge air is bled off and ducted to the precooler. This unit is often rather like a car radiator where hot water is passed through thin, finned tubes and cold outside air draws heat away from it. In the precooler, the hot bleed air goes through the "water" part of the radiator and the cold fan discharge air passes through the "air" side of the radiator. This fan air draws heat off the radiator elements that are being heated by the bleed air.

After passing through this element, the fan air simply exhausts overboard. In the case of the A-330, through the louvers you see in the picture. That installation is pretty typical of modern jet transports, by the way.
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Santhosh
Posts: 543
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RE: Air Intakes On A330 Engine?

Sun Feb 13, 2005 3:49 am

SlamClick- Sir thanx very much for the explanation.

BTW The cold air from the fan is drawn from the by pass section of the engine into the precooler. Right?

Regards,
George
Happy Landings :)
 
SlamClick
Posts: 9576
Joined: Sun Nov 23, 2003 7:09 am

RE: Air Intakes On A330 Engine?

Sun Feb 13, 2005 5:28 am

Right. All air entering the opening - some goes through the engine core, some around the "bypass" which is by way of a fan shroud or duct.
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