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Title: Bubble bursting and stall hysteresis on single-slotted flap high-lift configuration
Authors: Baragona, M ×
Boermans, LMM
van Tooren, MJL
Bijl, H
Beukers, Adriaan #
Issue Date: Jul-2003
Publisher: Amer inst aeronaut astronaut
Series Title: Aiaa journal vol:41 issue:7 pages:1230-1237
Abstract: Slotted multi-element configurations are widely used because they are very effective in increasing the maximum lift of airfoils during takeoff and landing. However, when stall occurs in the leading-edge region of one of the elements, the outcome is a sudden and dangerous drop in performance of the whole configuration. The results of the experimental verification of a computer-designed single-slotted flap are presented. Many realistic configurations, including the computed optimum, were tested and compared to the numerical predictions. For a number of these configurations, sudden leading-edge stall due to the bursting of a laminar bubble was detected on the flap, followed by severe stall hysteresis. Present numerical design codes do not help the designer much in predicting this important phenomenon, and wind-tunnel testing remains necessary. Therefore, there is a need for better bubble bursting prediction methods. A possible direction for improvement is discussed, focusing on the unsteadiness of the flow.
URI: 
ISSN: 0001-1452
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Materials Engineering - miscellaneous
× corresponding author
# (joint) last author

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