High lift configurations
Description
'Novel passive and active flow control for high lift'.
One of the challenges in aircraft development is the design of high-lift configurations. A clearly observable trend is the application of lightweight, single Fowler flaps capable of delivering higher values of lift coefficient in landing.
This lecture will take a closer look at various methods to improve the performance of wing-flap combinations. This will look at the application of both passive and active flow control. The aim of the research is to further quantify the possibilities offered by new, as yet unused, techniques.
In order to study various effects, experimental research has been carried out on a wing-valve combination performed in wind tunnels at Delft University of Technology.
Initial results show that for single profiles, up to ca. 18% increase in load-bearing capacity can be obtained when applying so-called nano-plasma actuators. To improve the behaviour at very large valve strokes, several techniques were applied at the valve leading edge. Application of cylinders, which generate a vortex that interferes with the flow on the valve show surprising results. At large valve angles, however, the counteracting pressure gradient is so high that the application of plasma actuators leads to very limited effects.
A major problem that arises in this case is "wake bursting". This unwanted flow phenomenon, which will be briefly explained, greatly limits the possibilities of obtaining very high lift coefficients when applying Fowler valves
Speaker(s)
dr.ir. L.L.M. Veldhuis
Location
College hall C Kluyverweg 1, 2629 HS Delft
Organiser
Aerospace Engineering
NVvL
Name and contact details for information
Christophe Hermans at the e-mail address below
Register via
NVvL, at
christophe.hermans@dnw.aero