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D'Aguanno, A. (author), González Romero, A. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
Hammerhead launcher configurations, characterized by a larger diameter in the payload fairing than the rest of the launch vehicle, face substantial challenges during transonic operations due to their susceptibility to flow separation and intense pressure fluctuations. This experimental study investigates the influence of the nose and boat-tail...
conference paper 2024
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Laguarda, L. (author), Hickel, S. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
Wall-resolved large-eddy simulations (LES) are carried out to investigate the aeroelastic coupling between a Mach 2.0 impinging shock-wave/turbulent boundary-layer interaction (STBLI) and a flexible thin-panel. After the initial transient, the panel exhibits self-sustained oscillatory behavior with varying oscillation amplitude, confirming the...
conference paper 2023
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Dacome, G. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
The current study considers the configuration of a transverse jet in a supersonic crossflow that is interacting with an impinging oblique shock wave. The relevance of this configuration is associated to high-speed air-breathing propulsion systems, where a shock may be induced in the combustion chamber to enhance mixing. To investigate the...
conference paper 2022
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D'Aguanno, A. (author), Camps Pons, C. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
In this study the effect of wing sweep on transonic buffet is studied experimentally to reveal the differences between two-dimensional (2D) and three-dimensional (3D) wing configurations. Background oriented schlieren (BOS) and stereographic particle image velocimetry (PIV) have been used as measurement techniques, performing experiments on: an...
conference paper 2022
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Sampat, R.P. (author), Goselink, N.G.H. (author), Schrijer, F.F.J. (author), Gangoli Rao, A. (author)
Flameless Combustion is an interesting low NO<sub>x</sub> combustion technology for gas turbine engines. In order to design systems for stringent performance standards, it is important to understand emission formation in this regime. To this end, the characteristics of a combustor capable of operating in the Flameless regime are studied....
conference paper 2022
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Laguarda, L. (author), Hickel, S. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
We investigate Reynolds number effects in shockwave/turbulent boundary-layer interactions (STBLI) with strong mean flow separation. Three wall-resolved large-eddy simulations (LES) are performed for this purpose, with different Reynolds number but otherwise equal flow parameters and simulation setup. The resulting LES data covers more than a...
conference paper 2022
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D'Aguanno, A. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
View Video Presentation: https://doi-org.tudelft.idm.oclc.org/10.2514/6.2021-2558.vid<br/><br/>This experimental study investigates the use of shock control bumps (SCBs) for controlling transonic buffet. Three-dimensional SCBs have been applied on the suction side of an OAT15A supercritical airfoil with the experiments conducted in the transonic...
conference paper 2021
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Beltrame, F. (author), Head, A.J. (author), de Servi, C.M. (author), Pini, M. (author), Schrijer, F.F.J. (author), Colonna, Piero (author)
This paper reports one of the initial NICFD experiments in the nozzle test section of the ORCHID aimed at providing accurate data for the validation of flow solvers, albeit, at this stage of the research, the focus is limited to inviscid phenomena. Notably, a series of schlieren photographs displaying Mach waves in the supersonic flow of the...
conference paper 2021
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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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van Oudheusden, B.W. (author), Flinkerbusch, Arti (author), Schrijer, F.F.J. (author)
The paper investigates the application of wall porosity for controlling the interaction between an impinging oblique shock wave and a turbulent boundary layer. This type of passive control aims to smear out the shock system in the longitudinal extent, thus inducing a more gradual pressure rise over the shock system with associated decrease of...
conference paper 2019
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D'Aguanno, A. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
This paper investigates the appearance, propagation and orientation of upstream travelling waves (UTWs) in transonic buffet. Their role has been studied experimentally on a supercritical airfoil (OAT15A) in the transonic-supersonic wind tunnel of TU Delft at Mach number of 0.7, and an angle of attack of 3.5. In the experiments Background...
conference paper 2019
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D'Aguanno, A. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
This study investigates the possibility of controlling transonic buffet by means of a Gurney Flap with an upward deflection at the trailing edge of the airfoil (UGF). Different geometries and dimensions of UGFs have been studied for their impact on the buffet behaviour. The effectiveness of the UGFs has been tested experimentally with Schlieren...
conference paper 2019
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Santiago Patterson, J. (author), Laguarda, 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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Laguarda, 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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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 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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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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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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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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