Monday 3rd March 2014
Why aircraft may soon grow bumps on their wings
Professor Holger Babinsky, Professor of Aerodynamics
Department of Engineering, University of Cambridge
19.30, Monday 3rd March, 2014
Wolfson Lecture Theatre
Churchill College, Storey's Way, Cambridge
One of this years bursary winners, Fernado Bravo, will be giving a short 10 min presentation on his research topic "How music affects the processing of auditory and visual information in the brain" prior to Professor Babinsky's lecture.
Download a full synopsis of the lecture as an Adobe PDF file
Improving the efficiency of modern transport aircraft continues to be an active area of research. Although the current design solution has now reached a high level of maturity, there are potential developments afoot that may force engineers to re-think the shape of the wings.
The most significant development is the possible introduction of 'laminar flow wings'. These have a subtly altered shape to promote a greater extent of 'laminar flow' (as opposed to turbulent flow which covers more than 90% of current wings). Laminar flow has a lower skin friction drag and this therefore has the potential to reduce aircraft drag considerably. However, the different shaping of the wing cross-section (the aerofoil) is likely to lead to the increase of another, more obscure, drag component: wave drag.
In this lecture I will begin by re-visiting how lift is generated by aerofoils (hopefully getting rid of some misconceptions) and why, in modern transonic aircraft, this leads to the generation of shock waves - the cause of wave drag.
Finding flow control devices that can alleviate the adverse effects of shock waves on wings has been an actively researched across the world for several decades. Lately, much work has focused on the tree-dimensional 'shock control bump' which was first tested here in Cambridge more than a decade ago.
I will first explain the fundamental physical function of shock control bumps and then briefly describe the current research aimed at optimising this device for potential application on future wings.
Professor Holger Babinsky has kindly provided the slides of his lecture, for our archive. It may be downloaded here. It is on the large side but well worth the wait (~3 mins download time)
Our next visit, to the David Ball Group, will take place on Thursday 20th March. Full details may be downloaded here.
The 2014 CSAR bursaries have been awarded. Go to the bursary page for the full details of the winners
Professor Lawrence Sherman has kindly provided the slides of his lecture, for our archive. It may be downloaded here.
We are happy to announce that the short list for the CSAR 2013/14 Bursaries has now been determined. The list will be found on the Bursary page.
Ray Thompson has kindly provided the slides of his lecture, for our archive. It may be downloaded here. It is in pptx format and rather large so be patient when downloading.
CSAR is a Registered Charity (No. 1142337)
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