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Old 27th Nov 2011, 16:33
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code0
 
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Vortex Generators

Greetings for the Season!

I have a question. first story is - Vortex Generators (VGs) are used to energize the airflow which re-fixes the boundary layer on top of the wing. This ideally can be thought of a sprinkler effect - laymen's thought! in Boeing 757 there are 14 VGs on each wing. The 14 VGs energizers the boundary layer

Second story is - Boeing 737NGs have 10 VGs just before the windshield. Boeing says that reduces the cockpit noise by 3-4 dbs.

Now my question is if the VGs are used to energize the airflow, what is the explanation of them using to reduce the cockpit noise. to my understanding the 10 VGs energizes the airflow more! and the energized airflow hit the windshield creating more noise? Should they call it "NOT" Vortex Generators but something else?

Hoping an answer that could straighten my so confused eyeballs!

thanks

Code0
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