Searched for: author:"Schrijer, F.F.J."
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Tambe, S.S. (author), Schrijer, F.F.J. (author), Gangoli Rao, A. (author), Veldhuis, L.L.M. (author)
Abstract: Infrared thermography is applied to measure the spiral vortices in the boundary layer over a rotating cone under axial inflow. The data sets are analysed using proper orthogonal decomposition (POD). A criterion based on the signal-to-noise ratio is defined for the selection of relevant POD modes, such that a low-order reconstruction...
journal article 2019
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Tambe, S.S. (author), Schrijer, F.F.J. (author), Gangoli Rao, A. (author), Veldhuis, L.L.M. (author)
Boundary layer instabilities and the formation of coherent spiral vortices over a rotating cone and ellipsoid are studied experimentally. It is found that under a non-axial inflow, the breaking of symmetry in the flow field significantly disturbs the coherence and delays the formation of spiral vortices to higher local Reynolds numbers (Re_l)...
conference paper 2019
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Laguarda Sanchez, L. (author), Hickel, S. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
The dynamic interaction of two planar and asymmetric shock waves at a free-stream Mach number M¥ = 3 is studied numerically in order to characterize the transition between the regular (RI) and Mach (MI) interaction patterns. Shock deflection disturbances are independently introduced in the form of a sinusoidal oscillation of the shock generator....
conference paper 2019
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Laguarda Sanchez, L. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author), Hickel, S. (author)
An experimental investigation of shock-shock interactions has been conducted with the aim of studying the transition between Regular (RI) and Mach (MI) interactions induced by a variation of the inflow Mach number. The experiments were conducted in the TST-27 wind tunnel at Delft University of Technology. For all cases, the wind tunnel runs were...
conference paper 2019
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Head, A.J. (author), Colonna, Piero (author), Schrijer, F.F.J. (author), Gallo, M. (author), Novara, M. (author)
This work assesses the feasibility of the planar PIV technique to study the characteristics of a siloxane vapor D4. Titanium dioxide (TiO2) seeding particles were used to track the motion around a rotating disk in a low speed flow. Vector fields of natural convection (NC) and a superposition of NC and rotating flow were selected as exemplary...
journal article 2019
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Giepman, R.H.M. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
High-resolution particle image velocimetry measurements were performed on laminar and transitional oblique shock wave reflections for a range of Mach numbers (M D 1:6-2:3), Reynolds numbers (Re<sub>xsh</sub> D 1.4×10<sup>6</sup>-3.5×10<sup>6</sup>) and flow deflection angles (θ 1°-5° or p3=p1 D 1.11-1.64). The laminar interactions revealed a...
journal article 2018
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van Gent, P.L. (author), van Oudheusden, B.W. (author), Schrijer, F.F.J. (author)
The feasibility of computing the flow pressure on the basis of PIV velocity data has been demonstrated abundantly for low-speed conditions. The added complications occurring for high-speed compressible flows have, however, so far proved to be largely inhibitive for the accurate experimental determination of instantaneous pressure. Obtaining...
journal article 2018
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Ye, Q. (author), Schrijer, F.F.J. (author), Scarano, F. (author)
The variation of transitional flow features past a micro-ramp is investigated when the Reynolds number is decreased approaching the critical regime. Experiments are conducted in the incompressible flow spanning from supercritical to subcritical roughness-height-based Reynolds number ( , 730, 460 and 320) with tomographic particle image...
journal article 2018
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Van Campenhout, Olaf W.G. (author), van Nesselrooij, M. (author), Veldhuis, L.L.M. (author), van Oudheusden, B.W. (author), Schrijer, F.F.J. (author)
Although various experimental studies have confirmed the potential drag reducing effect of dimpled surfaces in a turbulent boundary layer, the working mechanism remains largely unresolved. An experimental investigation has been performed with the objective to strengthen the understanding of this aerodynamic surface and its interaction with...
conference paper 2018
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Schrijer, F.F.J. (author), Solana Perez, Roberto (author), van Oudheusden, B.W. (author)
Transonic buffet of a supercritical airfoil (OAT15A) is investigated by means of schlieren visualization and high speed PIV. The buffet conditions were observed to be strongest at M = 0.7 and a = 3.5o at a frequency of 160 Hz. By means of conditional averaging according to the shock location and movement, the typical buffet cycle is illustrated,...
conference paper 2018
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Voogt, Nick (author), van Oudheusden, B.W. (author), Schrijer, F.F.J. (author)
The aim of the present study is to quantify the influence of large, ribbed wall roughness elements on the mean flow and heat transfer properties of a turbulent, supersonic boundary layer (M = 2.0). Fifteen test geometries, including one smooth and fourteen rough surfaces are tested using Schlieren, PIV and QIRT. Heat transfer measurements were...
conference paper 2018
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van Gent, P.L. (author), Michaelis, D (author), van Oudheusden, B.W. (author), Weiss, P.E. (author), de Kat, R. (author), Laskari, A. (author), Jeon, Y.J. (author), David, L (author), Schanz, D (author), Huhn, F. (author), Gesemann, S (author), Novara, M. (author), McPhaden, C. (author), Neeteson, N. J. (author), Rival, David E. (author), Schneiders, J.F.G. (author), Schrijer, F.F.J. (author)
A test case for pressure field reconstruction from particle image velocimetry (PIV) and Lagrangian particle tracking (LPT) has been developed by constructing a simulated experiment from a zonal detached eddy simulation for an axisymmetric base flow at Mach 0.7. The test case comprises sequences of four subsequent particle images (representing...
journal article 2017
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Tambe, S.S. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
The physical relation between the geometry and the flow topology of the wake of a micro ramp is investigated by means of a parametric study. Various micro ramp geometries are placed in a supersonic turbulent boundary layer at a free-stream Mach number of 2. The flow field is measured with schlieren and Particle Image Velocimetry (PIV). The...
conference paper 2017
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van Gent, P.L. (author), Payanda, Qais (author), Brust, Steve (author), van Oudheusden, B.W. (author), Schrijer, F.F.J. (author)
PIV measurements have been carried out to study the effect of exhaust plume and nozzle length on the flow topology and mean pressure distribution of axisymmetric base flows at freestream Mach numbers 0.76 and 2.20. Four different nozzle lengths with and without exhaust plume have been tested. The use of different nozzle lengths leads to flow...
conference paper 2017
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Nayak, K. (author), Giepman, R.H.M. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
Micro-ramp vortex generators (or micro-ramps) have gained popularity as promising alternatives to boundary layer bleed for high speed flow-control applications. Micro-ramps generate a counter-rotating vortex pair which leads to a more separation resistant boundary layer. Furthermore, they modulate the size of the shock induced separation bubble...
conference paper 2017
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Schrijer, F.F.J. (author), Horchler, T. (author), Deck, S (author), van Gent, P.L. (author)
The present work is conducted in the framework of the ESA TRP “Launcher Base Flows and Shock Interactions Regions Improved Load Characterization”, where high speed PIV measurements and unsteady pressure measurements performed in the DNW-HST on a 1:60 scale Ariane 5 are compared to simulations using IDDES and ZDES for the same configuration and...
conference paper 2017
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Ye, Q. (author), Schrijer, F.F.J. (author), Scarano, F. (author)
The transitional flow features over and downstream of isolated roughness elements in hypersonic flow are investigated by means of infrared thermography. The local heat flux distribution in the wake of the roughness element reveals the footprint of multiple streamwise counter-rotating vortex pairs. The formation of a turbulent wedge with the...
conference paper 2016
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Ye, Q. (author), Schrijer, F.F.J. (author), Scarano, F. (author)
The transitional flow features past a micro-ramp are investigated in the incompressible flow regime at critical and supercritical roughness-height based Reynolds number (Reh). Tomographic PIV is adopted as the diagnostic technique to identify the instantaneous three-dimensional flow behaviour in the domain of 73 ramp height streamwise. The...
conference paper 2016
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Brust, S.G. (author), van Gent, P.L. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
conference paper 2016
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van Campenhout, O.W.G. (author), van Nesselrooij, M. (author), Veldhuis, L.L.M. (author), van Oudheusden, B.W. (author), Schrijer, F.F.J. (author)
Although various experimental studies have confirmed a potential drag reduction of dimpled surfaces in turbulent boundary layers, the working mechanism behind the effect remains largely unresolved. The goal of this experimental study is to reveal the flow structures that could explain this drag reduction. To this end, flow visualizations over...
conference paper 2016
Searched for: author:"Schrijer, F.F.J."
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