Experimental detection of flow separation over a plain flap by wall shear stress analysis with and without steady blowing

Abstract

Separation flow controlExperimental detection of flow separation over a plain flap by wall shear stress analysis with and without steady blowing Détection expérimentale du décollement de l'écoulement sur un volet sans fente par l'analyse du frottement pariétal avec ou sans soufflage continu

Experimental closed-loop control of separated-flow over a plain flap using extremum seeking

“…11 summarizes the results previously evoked. As explained in Chabert et al (2014b), there is not enough pressure taps (especially on the flap hinge) to provide better than an estimate of the lift coefficient, denoted by C * L . The evolution of the estimated lift coefficient C * L is plotted as a function of forcing frequency f + for a flap deflection angle δ = 37 • in Fig.…”

SISO model‐based control of separated flows: Sliding mode and optimal control approaches

“…[9][10][11]). Flow separation occurring because of a large adverse pressure gradient such as observed for two-dimensional flap ( [12][13][14][15][16]) constitutes one of the standard 5009 benchmark for development of new actuators or advanced control strategies [4,5,17,18] and [19]. This configuration will be considered in the present paper as a test case to apply recently developed methods of the Control Theory.…”

A bilinear input-output model with state-dependent delay for separated flow control

“…Among the various strategies developed, those using pneumatic actuators, such as air blowers, are the most encountered. In the meantime, the preferred examined system concerns flow separating over a two-dimensional flap (see [1], [2], [3], [4] and [5]). These works generally study the system from the Fluid Mechanics point of view but the application of control theory should be fruitfull to control the opening and closing of the air blowers in an optimal and robust way.…”