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Application of computational fluid dynamics to three-dimensional bodies in hypersonic flow.

机译：计算流体动力学在高超声速流三维物体中的应用。

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摘要

Hypersonic aircraft are now being designed. For that work to be completed, improved computational tools are required. This work seeks to provide the flow simulation capabilities which are needed. In order to accomplish this, features of several existing codes have been combined and enhanced.;The Compressible Navier-Stokes (CNS) computer code solves the thin-layer Navier-Stokes equations in three dimensions for arbitrary vehicle shapes. The solver can capture strong or weak shocks, and can model separated flow. Boundary-layer turbulence is accounted for empirically by use of the Baldwin-Lomax turbulence model. The code uses ideal gas assumptions or an equilibrium real gas model. Geometries are gridded in a zonal fashion, allowing for flexible convergence strategies and use of the best available equation set for each zone.;The grid on which the computations are performed is critical to the efficient generation of accurate solutions. Some of the criteria for grid quality are discussed, and a simple method of adapting grids to supersonic flow fields is presented.;The code has been tested against analytical, experimental, and numerical results, and shows excellent agreement for critical quantities such as heat transfer and skin friction. The zonal approach of the code and its modular structure allow for future inclusion of internal flow options, more complex geometrical models, nonequilibrium air chemistry, combustion chemistry, and other improvements.
机译：高超音速飞机现在正在设计中。为了完成该工作，需要改进的计算工具。这项工作旨在提供所需的流仿真功能。为此，已经合并并增强了几种现有代码的功能。可压缩的Navier-Stokes（CNS）计算机代码可针对任意车辆形状在三维上求解薄层的Navier-Stokes方程。解算器可以捕获强震动或弱震动，并且可以对分离的流进行建模。边界层湍流是根据经验使用鲍德温-洛马克斯湍流模型计算的。该代码使用理想气体假设或平衡实际气体模型。几何体以区域方式网格化，从而允许灵活的收敛策略并为每个区域使用最佳可用方程组。进行计算的网格对于有效生成精确解至关重要。讨论了一些网格质量标准，并提出了一种使网格适应超声速流场的简单方法。该代码已针对分析，实验和数值结果进行了测试，并显示了与关键量（如热传递）的出色一致性和皮肤摩擦。该规范的区域方法及其模块化结构允许将来包括内部流选项，更复杂的几何模型，非平衡空气化学，燃烧化学以及其他改进。

著录项

  • 作者

    Ryan, James Stevenson.;

  • 作者单位

    University of Colorado at Boulder.;

  • 授予单位 University of Colorado at Boulder.;
  • 学科 Engineering Aerospace.;Engineering Mechanical.;Physics Fluid and Plasma.
  • 学位 Ph.D.
  • 年度 1989
  • 页码 85 p.
  • 总页数 85
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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