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Old 26th Oct 2017, 21:56   #1 (permalink)
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Join Date: Feb 2000
Location: UK
Posts: 13,186
A320 airflow deflector

This...



It's a 2" wide vortex generator used to eliminate the infamous A320 howl. I am writing a short case study about it in a book on aircraft mods. However, I don't have access to an A320, and I can't get an answer out of anybody who has posted pictures online about permission to use their pictures (this photo I can find on both Lufthansa and Airbus websites, but I can't get an answer from Lufthansa, and there's no obvious contact for Airbus).

Can anybody do me a good photograph or two of it, and (vitally to keep my publisher happy!) an email with it giving me permission to reproduce the photograph. My PPRuNe mail box is permanently full, but I can be emailed on boffin at engineer dot com.

G
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Old 27th Oct 2017, 04:26   #2 (permalink)
 
Join Date: Dec 2007
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Performed that mod about this time last year, did have some pictures but not sure if I can find them, will try. There is also another vortex generator fitted on the inboard panel which doesn’t seem to be fitted on that aircraft, could just be the picture.
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Old 28th Oct 2017, 07:56   #3 (permalink)
 
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Did you get any pictures of the wee mod? If not, I can probably get some at work tonight, if that's any good?
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Old 28th Oct 2017, 21:46   #4 (permalink)
 
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I'll see what's in our shed on Monday...
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Old 29th Oct 2017, 18:55   #5 (permalink)
 
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E-mail sent.
Hope they are of some use.
Cheers!
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Old 31st Oct 2017, 19:17   #6 (permalink)
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Originally Posted by clarkieboy View Post
E-mail sent.
Hope they are of some use.
Cheers!
Received and absolutely perfect - many thanks.

I'll drop you an email later about what I'm up to - only fair, but thanks again.

G
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Old 1st Nov 2017, 13:03   #7 (permalink)
Ant
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Would be interested to know a bit more about that "infamous A320 howl", and how the vortex generator overcomes it.
Thanks.
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Old 1st Nov 2017, 14:38   #8 (permalink)
 
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Originally Posted by Ant View Post
Would be interested to know a bit more about that "infamous A320 howl", and how the vortex generator overcomes it.
Thanks.
Id assume that under certain flight conditions ( angle of the wing) airflow actively by on that vent will produce an unpleasant sound.
Not unlike you blowing over the top of a bottle.
That little ridge ( vortex generator) will deflect the airflow sufficiently to fix it.
But Im not an Airbus guru.
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Old 1st Nov 2017, 14:42   #9 (permalink)
 
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A bit of info here a320 Whine
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Old 3rd Nov 2017, 06:49   #10 (permalink)
Ant
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Thanks guys.

I remember reading an interesting discussion regarding the BAE 146 flap noise, due if I remember rightly to the proximity of the flaps to the fuselage. Same problem, different cause.
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