Engineering HDR Seminar Series 20, 2012: A Study on Wake Vortex Alleviation Of a Wing with a Reverse Delta Wing Add-on Device Using Particle Image Velocimetry (PIV)

Mr Afaq Altaf, EGT postgraduate student

Date: 2012-10-08
Time: 11:00 to 12:00
Venue: Engineering Meeting Room 1, 5-4-22


The serious impact of the trailing vortices from large aircrafts is well known. The severity of the interaction that can occur when a plane encounters one of these tip vortices is very grave. Wake vortex and turbulence generated by large aircrafts can cause instability, uncontrollable rolls, and sudden loss of altitude to a trailing aircraft. For safety reasons, this phenomena limits the spacing between aircrafts within the take-off and landing corridors at busy airports and hence, increases the time intervals between consecutive landings and take-offs. Finding a proper solution to problems caused by wake vortices is the main motivation behind the present investigation. Particle Image Velocimetry is to be used in a low speed wind tunnel to investigate the characteristics of the resultant vortices generated by the reverse delta wing add-on device, and the wing tip and flap tip of the half wing model downstream in planes perpendicular to the free stream direction and their dependence on angle of attack, at mean chord-based Reynolds number. The experimental setup is repeated for various angles of attack and different dimensions of the reverse delta wing add-on devices. This work will investigate the tangential velocity magnitude, vorticity and circulation magnitude of the resultant vortices generated downstream of the half wing model. The goal of this investigation is to hasten wake vortex decay which would reduce the hazard posed to trailing aircrafts and increase the aircraft handling capacity at airports. As it is desirable that add on devices have a minimal impact on overall wing, a six component force balance will be used to obtain the aerodynamic coefficients of the half wing model with and without the reverse delta wing add-on devices.

About the Speaker

Afaq Altaf graduated from International Islamic University Malaysia (IIUM) with a Bachelors of Engineering degree in Aerospace discipline in year 2007 and Master of Science degree in Mechanical Engineering discipline in year 2010. He joined Monash University for postgraduate studies in year 2011 under the supervision of Dr. Kenny Tan. His research in Monash University is focused on Wake Vortex Alleviation. The present study aims to develop efficient approaches for alleviating wake vortex problems.