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Zong, H. (author), Kotsonis, M. (author)This study experimentally investigates the influence of exit orifice shape on the performance characteristics of a three-electrode plasma synthetic jet actuator. High-speed Schlieren imaging system and phase-locked two-component PIV measurements are used for flowfield characterisation in quiescent conditions. Two actuator configurations with...journal article 2017
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Yarusevych, S. (author), Kotsonis, M. (author)This work examines the effect of local active flow control on stability and transition in a laminar separation bubble. Experiments are performed in a wind tunnel facility on a NACA 0012 airfoil at a chord Reynolds number of 130 000 and an angle of attack of 2 degrees. Controlled disturbances are introduced upstream of a laminar separation...journal article 2017
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- Groot, K.J. (author), Serpieri, J. (author), Kotsonis, M. (author), Pinna, Fabio (author) conference paper 2017
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Serpieri, J. (author), Kotsonis, M. (author)Time-resolved PIV measurements of the secondary instability modes of cross-flow vortices are presented. Measurements are performed on a large scale 45o swept wing at chord Reynolds number of 2.17 million in a low turbulence wind-tunnel facility. Using acquisition frequencies of 20 kHz, the present study is the first experimental demonstration...conference paper 2017
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Michelis, Theodorus (author), Kotsonis, M. (author), Yarusevych, S. (author)The present study considers the development of a Laminar Separation Bubble on the suction side of a NACA0018 airfoil under natural and forced conditions. Deterministic forcing is applied by means of a two-dimensional plasma actuator installed on the airfoil surface. The spatiotemporal characteristics of the bubble are measured using time...conference paper 2017
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Serpieri, J. (author), Kotsonis, M. (author)An experimental investigation of primary and secondary crossflow instability developing in the boundary layer of a 45° swept wing at a chord Reynolds number of 2.17 × 10<sup>6</sup> is presented. Linear stability theory is applied for preliminary estimation of the flow stability while surface flow visualisation using fluorescent oil is...journal article 2016
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Tol, H.J. (author), de Visser, C.C. (author), Kotsonis, M. (author)This paper presents a study on control of fluid flows using multivariate spline reduced order models. A new approach is presented for model reduction of the incompressible Navier-Stokes equations using multivariate splines defined on triangulations. State space descriptions are derived that can be used for control design. This paper considers...conference paper 2016
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Zong, H. (author), Kotsonis, M. (author)An experimental characterisation study of a large-volume three-electrode plasma synthetic jet actuator (PSJA) is presented. A sequential discharge power supply system is used to activate the PSJA. Phase-locked planar particle image velocimetry (PIV) and time-resolved Schlieren imaging are used to characterise the evolution of the induced flow...journal article 2016
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Zong, H. (author), Kotsonis, M. (author)A simplified model is established to estimate the jet exit density variation of a plasma synthetic jet actuator (PSJA) driven by a capacitive arc discharge. This model, in conjunction with phase-locked planar particle imaging velocimetry (PIV) measurements, enables the calculation of jet mechanical energy for different operating conditions....journal article 2016
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Tol, H.J. (author), de Visser, C.C. (author), Kotsonis, M. (author)A new methodology is presented for model reduction of linear parabolic partial differential equations (PDEs) on general geometries using multivariate splines on triangulations. State-space descriptions are derived that can be used for control design. This method uses Galerkin projection with B-splines to derive a finite set of ordinary...journal article 2016
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Droste, B. (author), Van Gent, R. (author), Straathof, M. (author), Steenhuizen, D. (author), Kotsonis, M. (author), Geuskens, F. (author), Shroff, S. (author), Guerriero, G. (author), Gangoli Rao, A. (author), Lada, C. (author), Dewanji, D. (author), Yu, H. (author), Schroijen, M. (author), Hoekstra, J. (author), The CleanEra Team (author)The CleanEra project was initiated with the goal of developing revolutionary ideas for civil aviation. These ideas were to offer solutions which would limit and reduce some of the negative aspects of aviation, namely: emissions and the use of resources. This book presents you with the highlights of this journey in search of new technologies for...book 2015
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Correale, G. (author), Winkel, R. (author), Kotsonis, M. (author)An experimental study aimed at the characterization of energy deposition of nanosecond Dielectric Barrier Discharge (ns-DBD) plasma actuators was carried out. Special attention was given on the effect of the thickness and material used for dielectric barrier. The selected materials for this study were polyimide film (Kapton), polyamide based...journal article 2015
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Serpieri, J. (author), Kotsonis, M. (author)In this work the flow visualization of the transition pattern occurring on a swept wing in a subsonic flow is presented. This is done by means of fluorescent oil flow technique and boundary layer hot-wire scans. The experiment was performed at Reynolds number of 2:15 . 106 and at angle of attack of -3º. At these conditions, three different flows...conference paper 2015
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Kotsonis, M. (author)The popularity of plasma actuators as flow control devices has sparked a flurry of diagnostic efforts towards their characterisation. This review article presents an overview of experimental investigations employing diagnostic techniques specifically aimed at AC dielectric barrier discharge, DC corona and nanosecond pulse plasma actuators....journal article 2015
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Wang, Y. (author), Li, Q. (author), Eitelberg, G. (author), Veldhuis, L.L.M. (author), Kotsonis, M. (author)Swirl recovery vanes (SRVs) are a set of stationary vanes located downstream from a propeller, which may recover some of the residual swirl from the propeller, hoping for an improvement in both thrust and efficiency. The SRV concept design for a scaled version representing the Fokker 29 propeller is performed in this paper, which may give rise...journal article 2014
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- Kotsonis, M. (author) doctoral thesis 2012
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Kotsonis, M. (author), Ghaemi, S. (author)The forcing behavior of a dielectric barrier discharge (DBD) actuator is investigated experimentally using a time-resolved particle image velocimetry (PIV) system in conjunction with a phase shifting technique. The spatio-temporal evolution of the induced flowfield is accurately captured within one high voltage (HV) cycle allowing the...journal article 2011
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Kotsonis, M. (author), Giepman, R. (author), Veldhuis, L.L.M. (author)A numerical investigation on the use of plasma actuators for transition control is presented. The numerical framework involves the solution of the full unsteady 2D incompressible Navier Stokes equations using a finite volume formulation. The set of equations is formulated by solving for the perturbations in the flow while a mean laminar boundary...conference paper 2011
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Van Ingen, J.L. (author), Kotsonis, M. (author)A correction to the eN method for transition prediction, that at present is in use at Delft University, is developed and tested. The existing method is based on solutions of the Falkner-Skan similar boundary layer equation without suction or blowing. The correction is based on additional solutions of this equation with suction and blowing. For...conference paper 2011
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Giepman, R.H.M. (author), Kotsonis, M. (author)The mechanical power production and electrical power consumption of the dielectric barrier discharge plasma actuator is investigated for different operating conditions. The ratio of these two values delivers the mechanical efficiency of the actuator as a flow acceleration device. The general trend is that higher carrier frequencies and voltages...journal article 2011