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

D'Aguanno, A.; Allerhand, P. Quesada; Schrijer, F.F.J.; Oudheusden, B.W. van

doi:10.1007/s00348-022-03551-1

Cited by 6 publications

(1 citation statement)

References 55 publications

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“…In the past decades, significant effort has been spent in visualizing the dynamics of flexible structures using optical techniques (Giovannetti et al 2017, Zhang et al 2019, Deng et al 2022, D'Aguanno et al 2023. Obtaining a full-field dataset of spatiotemporally-varying structural deformations (Giovannetti et al 2017, Wood et al 2018) is essential for identifying complex fluid-structure interaction (FSI) behavior.…”

Section: Introductionmentioning

confidence: 99%

High-frequency visualization of flexible structures using an event-triggered camera: multiple flapping membranes

Lyu,

Cai,

Liu

2024

Meas. Sci. Technol.

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Optical measurements of fluid–structure interaction (FSI) usually require high-speed imaging techniques. Traditional high-speed cameras are expensive and cannot record data continuously for long periods. An inexpensive and high-frequency measurement method that utilizes an event-triggered camera and a strobe laser is proposed in this paper. In this method, the k-means clustering technique was first employed to determine the precise time window in which to reconstruct frames from event data. Then, a Kalman filtering algorithm was used to extract the dynamic deformation process of the flexible structures from the noisy event data. Wind tunnel flutter tests were conducted using various sets of parallel membranes to examine the proposed method. Under the illumination of a 30-mW strobe laser, membrane flapping was recorded at a resolution of 1280 × 720 pixels with a frame rate of 10,000 fps. With no camera memory storage limitations, the proposed method could continuously record the membrane flapping, thereby making it easy to capture the intermittent flutter phenomenon at the flutter boundary. Various flapping modes, as well as mode transitions, were also observed and analyzed. For the first time, the collision processes between membranes were recorded during the flutter of multiple membranes. These collisions were found to be associated with the transitions between different flapping modes.

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Section: Introductionmentioning

confidence: 99%

High-frequency visualization of flexible structures using an event-triggered camera: multiple flapping membranes

Lyu,

Cai,

Liu

2024

Meas. Sci. Technol.

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Nonlinear shock-induced flutter of a compliant panel using a fully coupled fluid-thermal-structure interaction model

Shahriar,

Shoele

2024

Journal of Fluids and Structures

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High-speed shock–boundary-layer interaction over deformed surfaces

Kokkinakis,

Drikakis,

Spottswood

et al. 2023

Physics of Fluids

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This paper concerns the interaction of an oblique shock wave with a supersonic turbulent boundary layer over a thin panel surface, leading to shock–boundary layer interaction and panel buckling. We have performed high-order numerical simulations featuring various static two-dimensional surface deformations typically encountered in experiments. The deformation amplitudes we examined were at least half the height of the incoming turbulent boundary layer thickness. The results show that along the panel midspan, where the maximum deformation amplitude is located, the mean and root mean square pressure are affected by about 10%. Cases for which the pressure at the shock–boundary layer interaction was increased relative to the planar case showed to decrease downstream, and vice versa. Despite the weak response to the mean pressure amplitude, the mean pressure surface contour plots reveal that the streamwise, particularly the spanwise distribution, is affected more noticeably. For example, the surface deformation modes are shown to disrupt the spanwise constant mean pressure, forming higher (or lower) values at either the panel's midspan or edges, depending on the mode. Moreover, the surface curvature leads to a characteristic bending of the spanwise distribution, which can be concave or convex depending on the deformation mode. Analysis of the Reynolds stress anisotropy componentality at different heights from the buckled surface reveals a similar spanwise response of the turbulent velocity fluctuations. The results suggest that the deformation rate plays an important role alongside the deformation amplitude in the turbulent layer and shock–boundary layer interaction.

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

Cited by 6 publications

References 55 publications

High-frequency visualization of flexible structures using an event-triggered camera: multiple flapping membranes

High-frequency visualization of flexible structures using an event-triggered camera: multiple flapping membranes

Nonlinear shock-induced flutter of a compliant panel using a fully coupled fluid-thermal-structure interaction model

High-speed shock–boundary-layer interaction over deformed surfaces

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