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Vanierschot, M. (author), Perçin, M. (author), van Oudheusden, B.W. (author)Abstract: In this paper, the structure of the turbulent wake behind the inner tube of a suddenly expanding annular jet flow is studied. The flow field is measured using tomographic particle image velocimetry and analyzed using proper orthogonal decomposition (POD). It was found that both the instantaneous and time-averaged central wakes...journal article 2021
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Perçin, M. (author), Yazdanpanah, Mahdi (author), Amiri, Human (author), van de Meerendonk, R. (author), van Oudheusden, B.W. (author)This study explores the effects of rotational mechanisms on the characteristics of the leading edge vortex (LEV) by comparing translating and revolving flexible wings that are started from rest. Tomographic particle image velocimetry (tomographic-PIV) technique was employed to acquire three-dimensional flow fields for the revolving wings, while...conference paper 2019
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Yazdanpanah, Mahdi (author), Hazaveh, Hooman Amiri (author), Perçin, M. (author), van de Meerendonk, R. (author), van Oudheusden, B.W. (author)This study explores the effects of rotational mechanisms on the characteristics of the leading edge vortex (LEV) by comparing translating and revolving flexible wings that are started from rest. Tomographic particle image velocimetry (tomographic-PIV) technique was employed to acquire three-dimensional flow fields for the revolving wings, while...conference paper 2019
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Karasek, M. (author), Perçin, M. (author), Cunis, Torbjørn (author), van Oudheusden, B.W. (author), de Wagter, C. (author), Remes, B.D.W. (author), de Croon, G.C.H.E. (author)Flow visualisations are essential to better understand the unsteady aerodynamics of flapping wing flight. The issues inherent to animal experiments, such as poor controllability and unnatural flapping when tethered, can be avoided by using robotic flyers that promise for a more systematic and repeatable methodology. Here, we present a new...journal article 2019
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Vanierschot, M. (author), Muller, Jens S. (author), Sieber, Moritz (author), Perçin, M. (author), van Oudheusden, B.W. (author), Oberleithner, Kilian (author)In this paper, we study the shape and dynamics of helical coherent structures found in the flow field of an annular swirling jet undergoing vortex breakdown. The flow field is studied by means of time-resolved tomographic particle image velocimetry measurements. The obtained flow fields are analysed using both classic and spectral proper...journal article 2019
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van de Meerendonk, R. (author), Perçin, M. (author), van Oudheusden, B.W. (author)The flow field and fluid-dynamic loads of revolving low-aspect-ratio chordwise-flexible wings are studied experimentally at a Reynolds number of 10,000. The investigation involves phase-locked tomographic particle image velocimetry (PIV) complemented with force measurements. The pressure fields are reconstructed from the three-dimensional...journal article 2018
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Del Estal Herrero, A. (author), Perçin, M. (author), Karasek, M. (author), van Oudheusden, B.W. (author)Flow visualizations have been performed on a free flying, flapping-wing micro air vehicle (MAV), using a large-scale particle image velocimetry (PIV) approach. The PIV method involves the use of helium-filled soap bubbles (HFSB) as tracer particles. HFSB scatter light with much higher intensity than regular seeding particles, comparable to that...journal article 2018
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Vanierschot, M. (author), Perçin, M. (author), van Oudheusden, B.W. (author)In this paper, we report on the structure and dynamics of double helix vortex breakdown in a turbulent annular swirling jet. Double helix breakdown has been reported previously for the laminar flow regime, but this structure has rarely been observed in turbulent flow. The flow field is investigated experimentally by means of time-resolved...journal article 2018
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Del Estal Herrero, A. (author), Perçin, M. (author), Karasek, M. (author), van Oudheusden, B.W. (author)Flow visualizations have been performed on a free flying flapping-wing Micro Air Vehicle (MAV), using a large-scale particle image velocimetry (PIV) approach. The PIV method involves the use of helium filled soap bubbles (HFSB) as tracer particles. HFSB scatter light with much higher intensity than regular seeding particles and comparable to...conference paper 2018
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Tay, W. B. (author), de Baar, J.H.S. (author), Perçin, M. (author), Deng, S. (author), van Oudheusden, B.W. (author)Three-dimensional numerical simulations of a four-wing flapping micro aerial vehicle (FMAV) with actual experimentally captured wing membrane kinematics have been performed using an immersed boundary method Navier-Stokes finite volume solver. To successfully simulate the clap and fling motion involving the wing intersection, the numerical...journal article 2018
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Perçin, M. (author), Vanierschot, M. (author), van Oudheusden, B.W. (author)In this paper, we investigate the flow structures and pressure fields of a free annular swirling jet flow undergoing vortex breakdown. The flow field is analyzed by means of time-resolved tomographic particle image velocimetry measurements, which enable the reconstruction of the three-dimensional time-resolved pressure fields using the...journal article 2017
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- Deng, S. (author), Perçin, M. (author), van Oudheusden, B.W. (author), Bijl, H. (author), Remes, B.D.W. (author), Xiao, T (author) journal article 2017
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- Perçin, M. (author), van Oudheusden, B.W. (author), Remes, B.D.W. (author) journal article 2017
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van de Meerendonk, R. (author), Perçin, M. (author), van Oudheusden, B.W. (author)This study explores the flow field and fluid-dynamic loads generated by revolving low-aspect-ratio wings. The pressure field and load characteristics are successfully reconstructed from the phase-locked tomographic measurements in three independently measured volumes along the span of the wing. The vortical structures encompass a low pressure...conference paper 2016
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Anantharaman, V. (author), Waterson, N. (author), Nakiboglu, G. (author), Perçin, M. (author), van Oudheusden, B.W. (author)Orifice plates or flow restrictions are key components used in industry for flow measurement and control. They find application in gas and liquid circuits of, e.g., lithography machines, nuclear power plants and aerospace propulsion systems [1]. They are used typically either for measuring flow-rate or to introduce a pressure drop for purposes...conference paper 2016
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- Vanierschot, M. (author), Perçin, M. (author), van Oudheusden, B.W. (author) conference paper 2016
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van de Meerendonk, R. (author), Perçin, M. (author), van Oudheusden, B.W. (author)This study explores the flow field and fluid-dynamic loads generated by revolving low-aspect-ratio flat plate wings undergoing a revolving motion starting from rest. Three wings with different degree of chordwise flexural stiffness (i.e., rigid, moderate flexibility and high flexibility) have been tested in order to investigate the influence of...conference paper 2016
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Vanierschot, M. (author), Perçin, M. (author), van Oudheusden, B.W. (author)In this paper we investigate the three dimensional flow structures in a free annular swirling jet flow undergoing vortex breakdown. The flow field is analyzed by means of time-resolved Tomographic Particle Image Velocimetry measurements. Both time-averaged and instantaneous flow structures are discussed, including a detailed analysis of the...conference paper 2016
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Percin, M. (author), Vanierschot, M. (author), Van Oudheusden, B.W. (author)Annular jet flows are of practical interest in view of their occurrence in many industrial applications in the context of bluff-body combustors [1]. They feature different complex flow characteristics despite their simple geometry: a central recirculation zone (CRZ) as a result of flow separation behind the centerbody and an outer (between the...conference paper 2015
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Percin, M. (author)The growing need for mobile aerial platforms capable of performing reconnaissance tasks and gathering intelligence in hazardous and physically inaccessible areas has given rise to an increasing interest in the development of micro aerial vehicles (MAVs), in view of their potential capabilities of versatile and highly maneuverable flight....doctoral thesis 2015
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