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Proper-Orthogonal-Decomposition-Based Leveraging of Reentry Vehicle's Surface Environment

机译：基于正确正交分解的再入飞行器表面环境控制

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摘要

In the early stage of a reentry vehicle design are often necessary tools able to perform mission and trajectory trade studies. Many works in the literature present tools able to interpolate from a numerical database of high-fidelity simulations to a target free-stream condition. In this context, the work explores the capability of a reduced-order model in extending a limited database of computational fluid dynamics simulations to the full coverage of the design space. This results in a fast physic-based tool able to generate load history experienced on a vehicle's surface during the reentry flight. The reduced-order model is based on proper orthogonal decomposition coupled with a Gaussian process for interpolations. Main results are the history of the pressure and skin-friction coefficient of a reference trajectory related to a specific vehicle's control points. This output will be compared with a simple Gaussian metamodel based directly on the computational fluid dynamics data of such control points. A detailed cross-validation analysis of the model that provides a loss function map in the design space can be considered as a guide to in-fill the database with further computational fluid dynamics simulations, keeping the number of computational fluid dynamics runs at a minimum value to limit the computational budget.
机译：在再入飞行器设计的早期阶段，通常是能够执行任务和轨迹贸易研究的必要工具。文献中的许多著作提出了能够从高保真模拟的数值数据库内插到目标自由流条件的工具。在这种情况下，这项工作探索了降阶模型在将有限的计算流体动力学模拟数据库扩展到设计空间的整个范围方面的能力。这导致了基于物理学的快速工具，该工具能够生成重返飞行期间在车辆表面上经历的载荷历史。降阶模型基于适当的正交分解以及用于插值的高斯过程。主要结果是与特定车辆的控制点相关的参考轨迹的压力和皮肤摩擦系数的历史记录。该输出将直接基于此类控制点的计算流体动力学数据与简单的高斯元模型进行比较。在设计空间中提供损失函数图的模型的详细交叉验证分析可以被认为是用进一步的计算流体动力学模拟填充数据库的指南，可将计算流体动力学的运行次数保持在最小值限制计算预算。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2015年第6期|1563-1576|共14页
  • 作者

    Cinquegrana Davide;

  • 作者单位

    Ctr Italiano Ric Aerosp, Computat Fluid Dynam Lab, Fluid Mech Area, I-81043 Capua, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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