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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 performed to investigate Reynolds number effects in supersonic turbulent boundary layers (TBLs) at Mach 2.0. The resulting database covers more than a decade of friction Reynolds number Re<sub>τ</sub>, from 242 to 5554, which considerably extends the parameter range of current high-fidelity...journal article 2024
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D'Aguanno, A. (author), Quesada Allerhand, P. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)In this experimental study, panel flutter induced by an impinging oblique shockwave is investigated at a freestream Mach number of 2, using the combination of planar particle image velocimetry (PIV) and stereographic digital image correlation (DIC) to obtain simultaneous full-field structural displacement and flow velocity measurements. High...journal article 2023
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D'Aguanno, A. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)This experimental study investigates the use of shock control bumps (SCBs) for controlling transonic buffet. Threedimensional SCBs have been applied on the suction side of an OAT15A supercritical airfoil with the experiments conducted in the transonic–supersonic wind tunnel of Delft University of Technology at fully developed buffet...journal article 2023
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Carrasco Grau, J. (author), van Campenhout, O.W.G. (author), Hartog, Friso H. (author), van Nesselrooij, M. (author), Baars, W.J. (author), Schrijer, F.F.J. (author)Chevron-shaped protrusions have been proposed in the literature for turbulent skin friction reduction. However, there is no consensus on the performance of this passive flow control technique; both an increase and a decrease in drag have been observed in previous studies. There is also no experimental evidence to support the working mechanism...journal article 2023
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Tambe, S.S. (author), Schrijer, F.F.J. (author), Gangoli Rao, A. (author), Veldhuis, L.L.M. (author)Boundary-layer instability on a rotating cone induces coherent spiral vortices that are linked to the onset of laminar–turbulent transition. This type of transition is relevant to several aerospace systems with rotating components, e.g., aeroengine nose cones. Because a variety of options exist for the nose-cone shapes, it is important to...journal article 2023
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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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van Nesselrooij, M. (author), van Campenhout, O.W.G. (author), van Oudheusden, B.W. (author), Schrijer, F.F.J. (author), Veldhuis, L.L.M. (author)Accurately measuring small changes in aerodynamic drag over a flat surface stands at the core of the development of technologies capable of reducing turbulent friction drag. A wind tunnel drag measurement system was developed which improves significantly on the state of the art. Experimental tests demonstrated that an uncertainty of less than...journal article 2022
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D'Aguanno, A. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)This study experimentally investigates the effects of the sweep angle and finite wing on transonic buffet, studying two-dimensional (2-D) and three-dimensional wing configurations. Background-oriented schlieren and stereographic particle image velocimetry (PIV) have been used as measurement techniques, performing experiments on an OAT15A airfoil...journal article 2022
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Tambe, S.S. (author), Schrijer, F.F.J. (author), Veldhuis, L.L.M. (author), Gangoli Rao, A. (author)This work shows the behaviour of an unstable boundary-layer on rotating cones in high-speed flow conditions: high Reynolds number Rel > 106, low rotational speed ratio S < 1–1.5, and inflow Mach number M = 0.5. These conditions are most-commonly encountered on rotating aero-engine-nose-cones of transonic cruise aircraft. Although it has...journal article 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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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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D'Aguanno, A. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)This experimental study investigates the possibility of controlling transonic buffet by means of a trailing edge flap with an upward deflection (referred to as “upper trailing edge flap”, or: UTEF). Different geometries (straight and serrated) and dimensions of UTEFs (with heights ranging between 1 and 2% of the chord) have been studied with...journal article 2022
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Laguarda, L. (author), Santiago Patterson, J. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author), Hickel, S. (author)Experiments on shock–shock interactions were conducted in a transonic–supersonic wind tunnel with variable free-stream Mach number functionality. Transition between the regular interaction (RI) and the Mach interaction (MI) was induced by variation of the free-steam Mach number for a fixed interaction geometry, as opposed to most previous...journal article 2021
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D'Aguanno, A. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)Abstract: Transonic buffet behaviour of the supercritical airfoil OAT15A was investigated experimentally at flow conditions Ma= 0.7 and α= 3. 5 <sup>∘</sup>, using schlieren and particle image velocimetry (PIV). The general behaviour of the buffet cycle was characterised with short-exposure schlieren visualisation and phase-averaged PIV...journal article 2021
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D'Aguanno, A. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)This experimental study has the objective of providing new insight into the role of upstream traveling waves (UTWs) in the transonic buffet phenomenon, using the background-oriented schlieren (BOS) technique and corroborating the results with particle image velocimetry. The experiments were carried out on the supercritical OAT15A airfoil...journal article 2021
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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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Babinsky, Holger (author), Dupont, Pierre (author), Polivanov, Pavel (author), Sidorenko, Andrey (author), Bur, Reynald (author), Giepman, R.H.M. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author), Sansica, Andrea (author)An important goal of the TFAST project was to study the effect of the location of transition in relation to the shock wave on the separation size, shock structure and unsteadiness of the interaction area. Boundary layer tripping (by wire or roughness) and flow control devices (Vortex Generators and cold plasma) were used for boundary layer...book chapter 2021
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Tambe, S.S. (author), Schrijer, F.F.J. (author), Gangoli Rao, A. (author), Veldhuis, L.L.M. (author)Centrifugal instability of the boundary layer is known to induce spiral vortices over a rotating slender cone that is facing an axial inflow. This paper shows how a deviation from the symmetry of such axial inflow affects the boundary layer instability over a rotating slender cone with half-angle. The spiral vortices are experimentally...journal article 2021