FSI of high performance high-lift devices with circulation control via conditioned coandã-jets
Visualitza/Obre
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/192387
Tipus de documentText en actes de congrés
Data publicació2013
EditorCIMNE
Condicions d'accésAccés obert
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
reproducció, distribució, comunicació pública o transformació sense l'autorització del titular dels drets
Abstract
Current transport aircraft are limited to airports with comparatively long
runways for take-off and landing. An aircraft with short take-off and landing capabilities
is under investigation at the Collaborative Research Center 880. The aircraft employs
circulation controlled high lift devices where high velocity air is blown through a slot in
front of the flap. These high performance high-lift devices allow take-off and landing of the
aircraft at runways of 800 m length. The curved flap leading edge induces a Coandˇa effect
with the jet resulting in an attached flow up to the tip of the flap even at high deflection
angles of up to 85 . Examination of the aeroelasticity of the wing is of high importance
because of the sensitivity of the Coandˇa effect to perturbation through deformation and
consequential change in flow.
The large pressure gradients can play a significant role in the effective use of this jet
system. Preliminary studies have shown an influence on aerodynamic performance due
to slot deformation. Small changes in the aerodynamic characteristics can have adverse
effects on the stall behavior. A flap section model of the wing is used to analyze the
performance for several flight states. This high detail model allows capturing fine effects
over the whole wing chord and on the slot region while still including wing deformations.
The aerodynamic performance of the aeroelastic flap section model is compared to
the characteristics of the rigid airfoil. The analyzed flight states give an insight into
the influence of the deformation on the flow. Additionally the effects of jet momentum
variation on aerodynamics is shown and the dominant stall phenomena presented. The
local relative change in pressure can reach values between 10 and 20 % and has an influence
on the stall behavior of the section. The change in aerodynamic performance illustrates
the influence of small deformations on the sensitive circulation control.
ISBN978-84-941407-6-1
Fitxers | Descripció | Mida | Format | Visualitza |
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Coupled-2013-56 ... performance high-lift.pdf | 1,668Mb | Visualitza/Obre |