Experimental Investigation of Flow-Structure Interaction for a Compliant Panel under a Mach 2 Compression-Ramp

Ahn, Yoo-Jin; Musta, Mustafa N.; Eitner, Marc A.; Sirohi, Jayant; Clemens, Noel T.

doi:10.2514/6.2022-0293

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…In contrast, the measurement of both flow and structure using PIV and DIC simultaneously has been documented for low speed fluid-structure interactions, as in Zhang and Porfiri (2019)), which proves the feasibility of the simultaneous use of these techniques. Hortensius et al (2018) and Ahn et al (2022) are the only other studies in which these techniques have been used under supersonic flow conditions. In the former study, the interaction between an underexpanded jet and an adjacent compliant surface is investigated without time resolving neither the flow nor the structure, in the latter, the oscillation of a compliant panel under a compression ramp is analyzed.…”

Section: Objectivementioning

confidence: 99%

Characterization of shock-induced panel flutter with simultaneous use of DIC and PIV

et al. 2023

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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-speed cameras are employed to obtain a time-resolved description of the panel motion and the shockwave-boundary layer interaction (SWBLI). In order to prevent interference between the PIV and DIC systems, an optical isolation is implemented using fluorescent paint, dedicated light sources, and camera lens filters. The effect of the panel motion on the SWBLI behavior is assessed, by comparing it with the SWBLI on a rigid wall. The results show that panel oscillations occur with a maximum amplitude of ten times the panel thickness. The dominant frequencies observed in the panel oscillation (424 Hz and 1354 Hz) match the main spectral content of the reflected shockwave position. A further POD analysis of the panel displacement spatial distribution shows that these two frequency contributions are well captured by the first two POD modes, which correspond, respectively, to a first and a third bending mode shape and account for 92% of the total oscillation energy. The fluid-structure coupling is studied by identifying, in the flow, the regions of maximum correlation between the panel displacement and the flow velocity fluctuations. The results obtained prove that the inviscid flow region upstream of the SWBLI is perfectly in phase with the panel oscillation, while the downstream region has a delay of one quarter of the flutter cycle.

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Section: Objectivementioning

confidence: 99%

Characterization of shock-induced panel flutter with simultaneous use of DIC and PIV

et al. 2023

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“…Such interactions can induce significant deformations that, in turn, modify the fluid flow. The complexity of the FSI phenomena necessitates the application of multiple approaches for their investigation, including numerical simulations [30][31][32], experimental methods [33][34][35], and hybrid techniques [36]. Within the extensive body of scientific literature addressing FSI, the moving mesh Arbitrary Lagrangian-Eulerian (ALE) method has been frequently utilized [37,38] due to its capacity to handle the intricate nature of FSI phenomena.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Fluid-Structure Interaction in Undulated Cavity

Tarek,

Elhadj,

Mohammed

et al. 2023

IJHT

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This study presents a numerical exploration into the phenomenon of natural convection within a cavity, characterized by a straight (cold) right wall and a wavy (hot) left wall. The focus lies in the dynamic interaction between the working fluid (air) and a sinusoidally moving solid structure (the fin). The Arbitrary Lagrangian-Eulerian (ALE) methodology is employed to handle the moving mesh, and the Galerkin weighted residual finite element method is utilized to solve the nonlinear equations and boundary conditions. A mesh validation test is undertaken, and a comparative analysis against numerical reference is included. In a novel approach, a mathematical formulation incorporating the geometric aspect ratio Ar (defined as the fundamental wavelength relative to its wavy width) is introduced into the fundamental equations. Numerical results, including isotherms, streamlines, temperature profiles, horizontal velocity, and local heat flux coefficient, are presented under specific conditions: a geometry ratio Ar=0.3, a Rayleigh number spanning from 10 3 to 10 7 , and a dimensionless time t ranging from 10 -5 to 3. These results are based on three distinct positions of the oscillating elastic. The findings elucidate the combined effect of convection and the vibration of the flexible oscillating fin, particularly at high Rayleigh numbers. This study contributes novel insights into the complex interplay between fluid dynamics and vibrating structures in the context of natural convection.

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Experimental Investigation of Flow-Structure Interaction for a Compliant Panel under a Mach 2 Compression-Ramp

Cited by 2 publications

References 8 publications

Characterization of shock-induced panel flutter with simultaneous use of DIC and PIV

Characterization of shock-induced panel flutter with simultaneous use of DIC and PIV

Numerical Simulation of Fluid-Structure Interaction in Undulated Cavity

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