Saw-tooth pattern improves noise profile of the Lufthansa 747-8

Published on : Monday, February 18, 2013

LufthansaThe Lufthansa Group remains committed to reducing aircraft noise emissions in order to minimise its impact on residents in the vicinity of airports. The greatest improvements can be achieved through the use of modern aircraft. That is why the Group is continuing to invest in the latest technology. Take the new Boeing 747-8, which has been in service with Lufthansa since 2012. Its noise footprint – like that of the Airbus A380 – is about 30 per cent smaller than the footprint of comparable predecessor models.

The Boeing 747-8 is powered by newly developed GEnx-2B67 engines, which have a saw-tooth pattern on the trailing edges of the jet engine nozzles. These so-called chevron nozzles enhance the mixing rate of the turbulent shear layer, i.e. the layer of air between the hot, fast-moving exhaust gas stream from the interior of the engine and the cold secondary air that flows around the engine core. Chevron nozzles help to significantly reduce pressure fluctuations and thus jet noise. In the case of GEnx engines, the saw-tooth concept is also applied to the outer trailing edge in order to reduce the noise emissions generated there.

As long ago as 2001, Lufthansa and the German Aerospace Centre (DLR) conducted a series of tests to measure the flyover noise generated by an Airbus A319 fitted with a chevron nozzle. The measurements demonstrated that the nozzle reduced the jet noise by about 1 dB(A).


2 Responses to Saw-tooth pattern improves noise profile of the Lufthansa 747-8

  1. att systems says:

    I’m gone to convey my little brother, that he should also pay a quick visit this web site on regular basis to take updated from hottest information.

  2. Wow, wonderful blog layout! How long have you been
    blogging for? you make blogging look easy. The overall look
    of your web site is great, as well as the content!

Leave a Reply

Your email address will not be published. Required fields are marked *


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>

arrow2Follow TTW
facebook-logo  twitter-logo  LinkedIn_logo  stumbleupon-logo   rss_logo 
ttw_blogger_logo  ttw_blogger_logo  ttw_blogger_logo


  • 03 itb-asia 2017
  • 04 Imex America 2017
  • 10 Globalwellnesssummit 2017
  • 10 thehotelshow 2017
  • 11 hospitalityaward 2017
  • 12 theleisureshow 17
  • 12 TTF17
  • 13 Frontiers Forum 2017
  • 14 bltm 2017
  • 14 patatravelmart 2017
  • 15 amsummit-ind 2017
  • 15 leisure 17
  • 16 Aviation Festival 2017
  • 16 OTDYKH 2017
  • 16 SKAL 17
  • 17 thincindonesia 2017
  • 17 worldmiceday 2017
  • 18 worldmiceday 2017
  • 19 IITM
  • 19 itehcmc 2017
  • 19 TTG Incontri 2017
  • 20 hmasummit  2017
  • 21 hoteltechhk 17
  • 43 PATA


Get our toolbar!
Review on