Nonlinear dynamics and flutter of plate and cavity in response to supersonic wind tunnel start

M Freydin, EH Dowell, SM Spottswood, RA Perez - Nonlinear Dynamics, 2021 - Springer
The transient response of a plate and a cavity is investigated in a supersonic wind tunnel
start experiment where the freestream flow inside the test section reaches turbulent flow at …

Response of a plate with piezoelectric elements to turbulent pressure fluctuation in supersonic flow

M Freydin, EH Dowell, SV Varigonda… - Journal of Fluids and …, 2022 - Elsevier
The aeroelastic response of a plate with supersonic freestream flow on one side and a
shallow cavity on the other to turbulent pressure fluctuations is investigated computationally …

Vibration of a thin panel exposed to ramp-induced shock-boundary layer interaction at Mach 2

MA Eitner, YJ Ahn, MN Musta, NT Clemens… - Journal of Fluids and …, 2023 - Elsevier
Flight vehicles that operate in the supersonic regime can be subject to adverse fluid–
structure interactions due to their lightweight design. The presence of geometric obstructions …

Correlation of supersonic wind tunnel measurements with a nonlinear aeroelastic theoretical/computational model of a thin plate

LP Serafim, M Freydin, EH Dowell - Journal of Fluids and Structures, 2023 - Elsevier
Supersonic wind tunnel test data is compared with a nonlinear aeroelastic computational
model, considering a freestream flow with Mach nearly 2, coupled cavity, and no-shock …

Hypersonic fluid–thermal–structural interaction of cone–slice–ramp: computations with experimental validation

A Sadagopan, D Huang, A Jirasek, J Seidel, A Pandey… - AIAA Journal, 2023 - arc.aiaa.org
The paper presents an investigation of fluid–thermal–structural interaction (FTSI) on a
complex geometry in hypersonic flows. The objective is to assess high-fidelity numerical …

Nonlinear supersonic flutter of a composite panel backed by an acoustic cavity with finite-amplitude sound waves

H Liu, Y Qu, S Liu, G Meng - International Journal of Mechanical Sciences, 2024 - Elsevier
In this paper, an implicit partitioned fluid-structure-acoustic interaction method is presented
for predicting nonlinear aeroelastic response of an elastic composite laminated panel …

Flutter and Limit-Cycle Oscillations of a Panel Using Unsteady Potential Flow Aerodynamics

LP Serafim, M Freydin, EH Dowell - AIAA Journal, 2023 - arc.aiaa.org
The potential aerodynamic theory is implemented to model the flow over a flexible panel.
The present study compares the more complete unsteady version of the potential flow theory …

Fully coupled nonlinear aerothermoelastic computational model of a plate in hypersonic flow

M Freydin, EH Dowell - AIAA Journal, 2021 - arc.aiaa.org
A recent structural model of a plate is extended to include a nonuniform temperature
differential that varies in time using a modal expansion. The nonlinear structural plate model …

Natural frequencies of a heated plate: Theory and experiment

M Freydin, D Levin, EH Dowell, S Vaibhav Varigonda… - AIAA Journal, 2020 - arc.aiaa.org
THE experimental work was undertaken as a precursor to a wind-tunnel experiment of a
heated plate in a hypersonic flow. It was desired to see if discernible changes in plate …

Limit Cycle Oscillation of Elastic Plate in Supersonic Flow

M Freydin, L Piccolo Serafim, EH Dowell… - AIAA Journal, 2024 - arc.aiaa.org
Fluid–structure interaction of an elastic plate with piezoelectric elements, turbulent
freestream flow at Mach 2.5, and a pressurized cavity is investigated computationally and …