Searched for: author:"Kotsonis, M."
(1 - 12 of 12)
document
Rizzo, Paolo (author), Serpieri, J. (author), Kotsonis, M. (author)
The present work is an experimental investigation of stationary crossflow (CF) instability-induced transition of the boundary layer over a 45°swept wing, under varying free-stream turbulence, surface roughness, angle of attack and Reynolds number. Key topological features of the transition front, such as the mean transition location and the...
conference paper 2019
document
Yadala Venkata, Srikar (author), Hehner, M.T. (author), Serpieri, J. (author), Benard, Nicolas (author), Kotsonis, M. (author)
undergoing cross-flow instability (CFI) induced transition. Dielectric barrier...
conference paper 2018
document
Rius Vidales, A.F. (author), Kotsonis, M. (author), Antunes, Alexandre (author), Cosin, Renato (author)
An experimental investigation was carried out to examine the effect of two-dimensional Forward Facing Steps surface irregularities, on the laminar-to-turbulent boundary-layer transition on a 45° swept-wing. For the clean reference case, the numerical boundary-layer flow is calculated from pressure measurements, and a thorough linear stability...
conference paper 2018
document
Groot, K.J. (author), Serpieri, J. (author), Kotsonis, M. (author), Pinna, Fabio (author)
conference paper 2017
document
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
document
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
document
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
document
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
document
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
document
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
document
Kotsonis, M. (author), Ghaemi, S. (author), Giepman, R.H.M. (author), Veldhuis, L.L.M. (author)
An experimental investigation on thrust and body force of Dielectric Barrier Discharge (DBD) /plasma actuators aimed at low power flow control applications is presented. A parametric study on thrust is conducted for a wide range of geometrical configurations as well as several electrical operational conditions. Direct measurements of the induced...
conference paper 2010
document
Kotsonis, M. (author), Boon, P. (author), Veldhuis, L. (author)
This paper describes the experimental investigation of the properties of Dielectric Barrier Discharge (DBD) actuators aimed at transition delay techniques. A wide range of geometrical configurations are tested as well as several electrical operational conditions. For the majority of the measurements statistical data for the induced flow field...
conference paper 2009
Searched for: author:"Kotsonis, M."
(1 - 12 of 12)