Quieter Lufthansa

Experts from Lufthansa Technik will be equipping the 100th aircraft of the Lufthansa A320 fleet with sound-reducing vortex generators in the next few weeks.

The Lufthansa Group and German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt – DLR) project is part of the research group ‘Quieter Transport’ (‘Leiser Verkehr’), has thus reached an important milestone.

Since November 2014, Lufthansa has added to its short and medium haul aircraft of the types Airbus A319, A320 and A321 noise-reducing components on the underside of the wings.  It is the first airline in the world to do so.  In total, 157 aircraft in the short and medium haul fleet are being equipped with a vortex generator. Newly built Airbus aircraft have already been delivered to Lufthansa with the technology fitted since the beginning of 2014.
 
Flyover measurements taken by Lufthansa in cooperation with the DLR show vortex generators remove annoying tones and significantly reduce the overall noise level of the aircraft when landing – by up to four decibels at distances of between 10 and 17 kilometres away from the airport.  According to information from the manufacturer, this effect is even greater further away from the airport.  These tones were previously created by airflows over circular pressure equalisation vents for the fuel tanks on the underside of the wings during flight.  The new components generate an air vortex over the pressure equalisation vents for the fuel tanks that effectively prevent these tones from being created.  www.lufthansagroup.com/de/themen/leiser-in-die-zukunft

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