Response of skin panels to combined self- and boundary layer-induced fluctuating pressure

Deshmukh, Rohit; Culler, Adam J.; Miller, Brent A.; McNamara, Jack J.

doi:10.1016/j.jfluidstructs.2015.08.008

Cited by 19 publications

(17 citation statements)

References 38 publications

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“…34 The numerical parameters used in this study are provided Table 3. The structural time step is consistent with that of Deshmukh et al, 37 which examined the same panel configuration subject to TBL pressure loads. 37 In contrast to this prior study, conservative values for the number of structural mode shapes and the thermal time step are specified to ensure local effects, due to the transitional aerothermodynamic loads, are accurately captured.…”

Section: Iib Problem Descriptionsupporting

confidence: 76%

“…Furthermore, Deshmukh et al 37 observed that the response of a panel to TBL loads was similar when assuming a random variation in space for ψ or the semi-empirical relation previously developed by Coe and Chyu. 38 Therefore, in this study ψ and τ are assumed to vary randomly with x and t, respectively.…”

Section: Iia1 Turbulent Boundary Layer Fluctuating Pressure Modelmentioning

confidence: 82%

“…37 The unsteady pressure due to the TBL is expressed as shown in Eq. 1, where f (x, t) and Θ(x, t) represent the magnitude and phase angle of the load.…”

Section: Iia1 Turbulent Boundary Layer Fluctuating Pressure Modelmentioning

confidence: 99%

“…The frequency domain PSD values must be converted to the time domain before pressure loads are applied to the panel. In previous studies 37,44 conversion from the frequency domain to the time domain was carried out using Discrete Inverse Fourier Transform. New sets of random numbers were generated at each time step to represent the random phase angles.…”

Section: Iia1 Turbulent Boundary Layer Fluctuating Pressure Modelmentioning

confidence: 99%

“…This configuration (geometry, material, freestream conditions) is selected for this study as it has been thoroughly examined in past works. 34,36,37 While this configuration does not represent an actual structure intended for use on a hypersonic vehicle, it provides a demonstration of the coupled response over a short time record. 34 The numerical parameters used in this study are provided Table 3.…”

Section: Iib Problem Descriptionmentioning

confidence: 99%

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Characterization of Structural Response to Hypersonic Boundary Layer Transition

Riley

Deshmukh

Miller

et al. 2015

56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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The inherent relationship between the state of the boundary layer, aerodynamic heating, and surface conditions make the potential for interaction between the structural response and boundary layer transition an important and challenging area of study in high speed flows. This paper phenomenologically explores this interaction using a fundamental aerothermoelastic model. Specifically, an existing model is extended to examine the impact of transition onset location, transition length and transitional overshoot on the structural response of surface panels. Transitional flow conditions are found to yield significantly increased thermal gradients, and can result in higher maximum panel temperatures compared to turbulent flow. Results indicate that accounting for transitional overshoot in heat flux and fluctuating pressure reduces the flutter onset time relative to no overshoot. Temperature-dependent material properties are found to cause dips in the flutter onset time for a subset of transitional flows. Furthermore, overshoot occurring near the mid-chord can yield average temperatures and peak displacements exceeding that experienced by the panel subject to turbulent flow. These results suggest that fully turbulent flow does not always conservatively predict the thermo-structural response of surface panels.

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Section: Iib Problem Descriptionsupporting

confidence: 76%

Section: Iia1 Turbulent Boundary Layer Fluctuating Pressure Modelmentioning

confidence: 82%

“…37 The unsteady pressure due to the TBL is expressed as shown in Eq. 1, where f (x, t) and Θ(x, t) represent the magnitude and phase angle of the load.…”

Section: Iia1 Turbulent Boundary Layer Fluctuating Pressure Modelmentioning

confidence: 99%

Section: Iia1 Turbulent Boundary Layer Fluctuating Pressure Modelmentioning

confidence: 99%

Section: Iib Problem Descriptionmentioning

confidence: 99%

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