Fundamental Aeronautics Hypersonics Project: Overview

Mansour, Nagi N.; Pittman, James L.; Olson, Lawrence E.

doi:10.2514/6.2007-4263

Cited by 30 publications

(19 citation statements)

References 5 publications

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“…[1][2][3][4][5] Many stem from an inability to simultaneously achieve operation in an extreme environment, vehicle survivability, and vehicle responsiveness. 4,5 This is due to the fact that a responsive vehicle is inherently compliant, which leads to strongly coupled multidiscipline interactions throughout the system.…”

Section: Introductionmentioning

confidence: 99%

Robust Treatment of Temperature Feedback in Aerothermodynamic Models for Fluid-Thermal-Structural Analysis

Crowell

Miller

McNamara

2013

54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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One of the primary challenges in the development of high-speed systems is accurate and efficient prediction of the aerodynamic heating, particularly for light-weight systems where the aerothermodynamic loads are strongly coupled with the structural response. This study builds upon previous work focused on using CFD surrogates for prediction of aerothermodynamic loads within a tightly integrated fluid-thermal-structural analysis framework. A novel approach is developed that corrects heat flux predictions from a pointwise dependency on surface temperature in order to account for surface temperature gradients. This enables efficient construction of a CFD surrogate for aerodynamic heating without a priori assumptions on the surface temperature profile; while also accurately maintaining the critical feedback behavior of the surface temperature profile for a coupled fluid-thermal-structural analysis. The method is compared, in terms of accuracy and efficiency, with a hierarchy of approaches for aerodynamic heating prediction. Comparison cases include simple flat plate heating, as well as shock impingements in two dimensional and three dimensional flows. Typically the approach yields less than 5% error relative to full-order CFD predictions, and clearly outperforms all other simple prediction methods in terms of accuracy. Furthermore, it maintains excellent computational efficiency, enabling long time record fluid-thermal-structural analysis in complex, three-dimensional flow environments.

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Section: Introductionmentioning

confidence: 99%

Robust Treatment of Temperature Feedback in Aerothermodynamic Models for Fluid-Thermal-Structural Analysis

Crowell

Miller

McNamara

2013

54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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“…Therefore, to guarantee optimal vehicle configurations, new high-fidelity strategies must be introduced earlier in the design process. [4][5][6] This work proposes such a strategy via the formulation of the adjoint problem for the non-equilibrium flow environment.…”

Section: Introductionmentioning

confidence: 99%

Adjoint-Based Aerothermodynamic Shape Design of Hypersonic Vehicles in Non-Equilibrium Flows

Copeland

Palacios

Alonso

2014

52nd Aerospace Sciences Meeting

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In this paper, a new, continuous formulation of the adjoint equations is derived for a steady, continuum, inviscid gas mixture in thermochemical non-equilibrium for force-based objective functions. These adjoint equations, when solved in conjunction with the governing equations, provide sensitivity information that can be used in a gradient-based optimization framework for shape design. The governing and adjoint equations are implemented in an unstructured, three-dimensional CFD solver, enabling efficient, optimal design of complex geometries with aerothermodynamic considerations in the presence of high-enthalpy, chemically reactive gas mixtures. Surface gradients calculated using the adjoint formulation provided herein are validated against finite-difference gradients for blunt-body and simple wing configurations.

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“…象, 这种处理能解决一定的工程问题, 但与实际情况存在一定差距. 随着NASP, TAV, HyTech, Hyper-X等计划的相继提出 [7] , 国外逐渐实现了工程方法的耦合求解, 发展形成了基于松/紧耦合求解的数值求解方法, 并在热气动弹性分析、单向/双向影响的耦合分析, 以及相关专业软件研制等方面取得了丰硕成果 [8][9][10] . 近来, 美国HTV-2, X-51A, X-37B等和俄罗斯锆石、匕首等高…”

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Combined thermal phenomena of hypersonic vehicle

Gui

2019

Sci. Sin.-Phys. Mech. Astron.

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Fundamental Aeronautics Hypersonics Project: Overview

Cited by 30 publications

References 5 publications

Robust Treatment of Temperature Feedback in Aerothermodynamic Models for Fluid-Thermal-Structural Analysis

Robust Treatment of Temperature Feedback in Aerothermodynamic Models for Fluid-Thermal-Structural Analysis

Adjoint-Based Aerothermodynamic Shape Design of Hypersonic Vehicles in Non-Equilibrium Flows

Combined thermal phenomena of hypersonic vehicle

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