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首页> 外文期刊>Journal of Spacecraft and Rockets >Multi-Fidelity Approach to Estimate Heating for Three-Dimensional Hypersonic Aeroshells
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Multi-Fidelity Approach to Estimate Heating for Three-Dimensional Hypersonic Aeroshells

机译：多维保真度方法估计三维高超音速飞机壳体的热量

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摘要

In the early stages of aeroshell shape design, it is important to strike an appropriate balance between analysis fidelity and computational effort. Because the prediction of aerodynamic heating for axisymmetric flows is significantly faster than for three-dimensional flows, it is advantageous to employ an axisymmetric analysis method. The current work couples an equivalent axisymmetric body technique with different axisymmetric analysis methods, using a series of axisymmetric bodies to approximate the three-dimensional heating. Three levels of fidelity are considered: 1) a Newtonian inviscid solution coupled with an axisymmetric integral boundary layer approach, 2) an Euler solution coupled with an axisymmetric integral boundary-layer approach, and 3) a Navier-Stokes solution applied to each equivalent axisymmetric body. Approximate solutions for three-dimensional flows were compared with high-fidelity computational and experimental data, establishing the accuracy for various levels of fidelity. The multi-fidelity analysis showed that significant decreases in computational times could be achieved, at the same time maintaining sufficient accuracy to perform shape optimization.
机译：在飞机外形设计的早期阶段，重要的是要在分析保真度和计算工作量之间取得适当的平衡。因为对轴对称流动的空气动力加热的预测比对三维流动的空气动力加热的预测要快得多，所以采用轴对称分析方法是有利的。当前的工作将等效的轴对称体技术与不同的轴对称分析方法结合在一起，使用一系列轴对称体来近似三维加热。考虑了三个级别的保真度：1）结合轴对称积分边界层方法的牛顿无粘性解； 2）结合轴对称积分边界层方法的欧拉解；以及3）应用于每个等效轴对称的Navier-Stokes解身体。将三维流的近似解与高保真度的计算和实验数据进行了比较，从而确定了各种保真度的准确性。多保真度分析表明，可以显着减少计算时间，同时保持足够的精度以执行形状优化。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2013年第4期|754-762|共9页
  • 作者

    Matthew S. Bopp; Stephen M. Ruffin; Robert D. Braun; Ian G. Clark; John E. Theisinger;

  • 作者单位

    Georgia Institute of Technology, Atlanta, Georgia 30332-0150;

    Georgia Institute of Technology, Atlanta, Georgia 30332-0150;

    Georgia Institute of Technology, Atlanta, Georgia 30332-0150;

    Georgia Institute of Technology, Atlanta, Georgia 30332-0150;

    NASA Langley Research Center, Hampton, Virginia 23681;

  • 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
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