Faculté des Sciences appliquées
Faculté des Sciences appliquées

Numerical and Experimental Unsteady Flow Analysis on Interflap Seals

Sanchez Santillana, Cristian ULiège
Promotor(s) : Andrianne, Thomas ULiège
Date of defense : 7-Sep-2020/9-Sep-2020 • Permalink :
Title : Numerical and Experimental Unsteady Flow Analysis on Interflap Seals
Author : Sanchez Santillana, Cristian ULiège
Date of defense  : 7-Sep-2020/9-Sep-2020
Advisor(s) : Andrianne, Thomas ULiège
Committee's member(s) : Dimitriadis, Grigorios ULiège
Bernay, Bruno 
Language : English
Number of pages : 70
Discipline(s) : Engineering, computing & technology > Aerospace & aeronautics engineering
Institution(s) : Université de Liège, Liège, Belgique
Degree: Cours supplémentaires destinés aux étudiants d'échange (Erasmus, ...)
Faculty: Master thesis of the Faculté des Sciences appliquées


[en] Interflap seals are often located between inner and outer flaps to maintain structural consistency and aerodynamic properties. This seals, often made of an elastomer material, have been observed to suffer from aeroelastic phenomena during the take-off and landing phases. In prior work, Dubois, R. established the baselines of the investigation, being this study focused on the characterization of low-subsonic flow around a three device airfoil system (slat, airfoil and flap) for a variable range of Reynolds numbers and angles of attack, with particular emphasis on the flap. The evolution of the aerodynamic coefficients and the Strouhal number at such conditions is determined by CFD computations and compared to wind tunnel measurements. The results reveal a remarkable dependence of the flow behavior to the Reynolds number, with shedding vortices observed under conditions similar to the ones encountered during landing and take-off. The Strouhal number of this fluctuations is observed to decrease with the angle of attack, with an increase in the amplitude of the fluctuations. The angle of attack has also a decreasing effect in the lift coefficient, while the opposite effect is observed in the drag coefficient, increasing with the mentioned angle.



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  • Sanchez Santillana, Cristian ULiège Université de Liège > conv. Erasmus en sc. appl.


Committee's member(s)

  • Dimitriadis, Grigorios ULiège Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale
    ORBi View his publications on ORBi
  • Bernay, Bruno Sonaca
  • Total number of views 21
  • Total number of downloads 1

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