Aerothermoelastic Scaling Laws for Hypersonic Skin Panel Configurations with Arbitrary Flow Orientation

Huang, Daning; Friedmann, Peretz P.; Rokita, Tomer

doi:10.2514/1.j057499

Cited by 13 publications

(3 citation statements)

References 27 publications

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“…By element assembling procedure, the global matrices of mass M, structural stiffness K, geometric stiffness K G , aerodynamic stiffness K a , aerodynamic damping C a and the global nodal force vector F T caused by thermal expansion are obtained according to Equations (17), (21), (26), (31) and (28). The total kinetic energy, potential energy and work done by external force are given in terms of the global nodal displacement vector d, as…”

Section: Governing Equationsmentioning

confidence: 99%

Mechanical Stability of Hybrid Corrugated Sandwich Plates under Fluid-Structure-Thermal Coupling for Novel Thermal Protection Systems

Zhuang

Yang

2020

Applied Sciences

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Hybrid corrugated sandwich (HCS) plates have become a promising candidate for novel thermal protection systems (TPS) due to their multi-functionality of load bearing and thermal protection. For hypersonic vehicles, the novel TPS that performs some structural functions is a potential method of saving weight, which is significant in reducing expensive design/manufacture cost. Considering the novel TPS exposed to severe thermal and aerodynamic environments, the mechanical stability of the HCS plates under fluid-structure-thermal coupling is crucial for preliminary design of the TPS. In this paper, an innovative layerwise finite element model of the HCS plates is presented, and coupled fluid-structure-thermal analysis is performed with a parameter study. The proposed method is validated to be accurate and efficient against commercial software simulation. Results have shown that the mechanical instability of the HCS plates can be induced by fluid-structure coupling and further accelerated by thermal effect. The influences of geometric parameters on thermal buckling and dynamic stability present opposite tendencies, indicating a tradeoff is required for the TPS design. The present analytical model and numerical results provide design guidance in the practical application of the novel TPS.

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Section: Governing Equationsmentioning

confidence: 99%

Mechanical Stability of Hybrid Corrugated Sandwich Plates under Fluid-Structure-Thermal Coupling for Novel Thermal Protection Systems

Zhuang

Yang

2020

Applied Sciences

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“…15,16 The consideration of non-classical boundary conditions, due to the deviation of assembly process, friction, and gasket creep in engineer practice, 17 also receives considerable investigations. 18–20 Moreover, the application of panel flutter as a flow control strategy has been explored by recent studies. 21–23…”

Section: Introductionmentioning

confidence: 99%

“…15,16 The consideration of nonclassical boundary conditions, due to the deviation of assembly process, friction, and gasket creep in engineer practice, 17 also receives considerable investigations. [18][19][20] Moreover, the application of panel flutter as a flow control strategy has been explored by recent studies. [21][22][23] While the behavior of panel flutter in its traditional form is well understood, investigations on the panel flutter induced by shock impingement are still in their early stage.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of characteristic change of panel flutter caused by oblique shock impingement

Meng,

Ye,

2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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Compared to the shock-free condition, the weak shock impingement stabilizes the flexible panel, while the strong shock impingement leads to the early onset of panel flutter with a significant increase in flutter amplitude and frequency. However, the reason for this change by shock impingement remains unclear. The current research examines the mechanism of this change by an in-house code where the von Kármán’s large deflection plate theory is coupled with two-dimensional Euler equations. Compared to the shock-free condition, the oblique shock impingement leads to the change of local dynamic pressure on the panel as well as the static pressure differential across the panel. The analysis on the influence of these changes indicates that, on the one hand, the average dynamic pressure on the panel becomes larger than the shock-free condition, accelerating the onset of panel flutter. On the other hand, the change of the static pressure differential across the panel alters the coupling characteristic between different natural frequencies (modes) of the panel structure. The dynamic response of panel flutter under shock impingements is dominated by the coupling between the second and third modes instead of the first two modes for panel flutter under the shock-free condition. The combined effect of these two changes leads to the change of flutter characteristics of the panel under shock impingement. These findings provide valuable insights into the mechanism of shock-induced panel flutter.

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Fluid/Structural/Thermal/Dynamics Interaction (FSTDI) in Hypersonic Flow

Dowell

2021

A Modern Course in Aeroelasticity

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Hypersonic flight is a major technical challenge and substantial efforts are currently underway to provide the understanding and technology required to design and operate effectively and safely a hypersonic aircraft for commercial or military purposes. Leyva [1] has recently described the essence of this challenge. The present chapter provides a summary of the past, present and proposed work for fluid/structural/thermal dynamics interaction.

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Aerothermoelastic Scaling Laws for Hypersonic Skin Panel Configurations with Arbitrary Flow Orientation

Cited by 13 publications

References 27 publications

Mechanical Stability of Hybrid Corrugated Sandwich Plates under Fluid-Structure-Thermal Coupling for Novel Thermal Protection Systems

Mechanical Stability of Hybrid Corrugated Sandwich Plates under Fluid-Structure-Thermal Coupling for Novel Thermal Protection Systems

Mechanism of characteristic change of panel flutter caused by oblique shock impingement

Fluid/Structural/Thermal/Dynamics Interaction (FSTDI) in Hypersonic Flow

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