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Numerical analysis of hypersonic flows around blunt-nosed models and a space vehicle

机译：钝头模型和航天器周围高超声速流动的数值分析

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摘要

This work addresses the problem of the aerothermodynamics of hypersonic nonequilibrium flows over blunt nosed models and space vehicles with rarefaction effects. First, the in-house Navier Stokes solver, UNIC-UNS code, with the slip boundary condition and finite-rate chemistry is used to simulate the hypersonic flows over a blunt nosed model and the simplified European eXPErimental Re-entry Test-bed (EXPERT) model V4.4. Next, hypersonic flows over the whole EXPERT 3D model, which correspond to the expected descent trajectory with allowance for rarefaction and thermochemical nonequilibrium are simulated. By comparing with the Direct Simulation Monte Carlo (DSMC) method, it is observed that the UNIC-UNS code is reliable in simulating hypersonic flows with rarefaction and thermochemical nonequilibrium effects. A detailed analysis of the aerothermodynamics for EXPERT for a wide range of flow regimes is also provided by utilizing the numerical flow visualization. The present numerical simulations provide some important data for EXPERT, which cannot be easily derived by experiments. This study aims to work as a precursor for future studies and to provide to the scientific community with quality data that can be used to improve tools for the design of hypersonic vehicles. (C) 2015 Elsevier Masson SAS. All rights reserved.
机译：这项工作解决了在具有钝化效应的钝鼻模型和航天器上高超声速非平衡流的气动热力学问题。首先，内部的Navier Stokes解算器UNIC-UNS代码具有滑移边界条件和有限速率化学作用，用于在钝嘴模型和简化的欧洲eXPErimental再入试验台（EXPERT）上模拟高超声速流动）模型V4.4。接下来，模拟整个EXPERT 3D模型上的高超音速流动，该流动与预期的下降轨迹相对应，并考虑到稀疏和热化学非平衡。通过与直接模拟蒙特卡罗（DSMC）方法进行比较，可以观察到UNIC-UNS代码在模拟具有稀疏和热化学非平衡效应的高超声速流动方面是可靠的。通过使用数值流可视化，还提供了针对广泛流态的EXPERT空气动力学的详细分析。目前的数值模拟为EXPERT提供了一些重要的数据，这些数据无法通过实验轻松得出。这项研究旨在作为未来研究的先驱，并为科学界提供可用于改进高超音速飞行器设计工具的质量数据。 （C）2015 Elsevier Masson SAS。版权所有。

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  • 来源
    《Aerospace science and technology》 |2015年第6期|360-371|共12页
  • 作者

    Massimi Heriberto Saldivar; Shen Hua; Wen Chih-Yung; Chen Yen-Sen; Liang Shen-Min;

  • 作者单位

    Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China;

    Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China;

    Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China;

    Natl Space Org, Hsinchu 30078, Taiwan;

    Far East Univ, Dept Comp Applicat Engn, Tainan 744, Taiwan;

  • 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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