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A case study on the aerodynamic heating of a hypersonic vehicle

机译：高超音速飞行器空气动力加热的案例研究

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摘要

A Parabolised Navier-Stokes (PNS) flow solver is used to predict the aerodynamic heating on the surface of a hypersonic vehicle. This case study highlights some of the main heat flux sensitivies to various conditions for a full-scale vehicle and illustrates the use of different complimentary methods in assessing the heat load for a realistic application. Different flight phases of the vehicle are considered, with freestream conditions from Mach 4 to Mach 8 across a range of altitudes. Both laminar and turbulent flows are studied, together with the effect of the isothermal wall temperature, boundary-layer transition location and body incidence. The effect of the Spalart-Allmaras and Baldwin-Lomax turbulent models on the heat transfer distributions is assessed. A rigorous assessment of the computations is conducted through both iterative and grid convergence studies and a supporting experimental investigation is performed on a 1 /20th scale model of the vehicle's forebody for the validation of the numerical results. Good agreement is found between the PNS predictions, measurements and empirical methods for the vehicle forebody. The present PNS approach is shown to provide useful predictions of the heat transfer over the axisymmetric vehicle body. A highly complex flow field is predicted in the fin-body-fin region at the rear of the vehicle characterised by strong interference effects which limit the predictions over this region to a predominately qualitative level.
机译：抛物线型Navier-Stokes（PNS）流量求解器用于预测高超音速飞行器表面的空气动力加热。本案例研究重点介绍了全尺寸车辆对各种条件的一些主要热通量敏感性，并说明了在评估实际应用中的热负荷时使用不同的互补方法。考虑了车辆的不同飞行阶段，在整个高度范围内从4马赫到8马赫的自由流条件。研究了层流和湍流，以及等温壁温，边界层过渡位置和物体入射的影响。评估了Spalart-Allmaras和Baldwin-Lomax湍流模型对传热分布的影响。通过迭代和网格收敛研究对计算进行严格评估，并在前车身的1/20比例模型上进行辅助实验研究，以验证数值结果。在PNS的前体预测，测量和经验方法之间发现了很好的一致性。示出了本发明的PNS方法为轴对称车身上的热传递提供有用的预测。在车辆后部的鳍片-鳍片区域预测到一个高度复杂的流场，其特征在于强烈的干扰效应，这将对该区域的预测限制在定性水平。

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  • 来源
    《The Aeronautical Journal》 |2012年第1183期|p.873-893|共21页
  • 作者

    M. Mifsud; D. Estruch-Samper; D. MacManus; R. Chaplin; J. Stollery;

  • 作者单位

    School of Engineering Cranfield University Bedfordshire, UK;

    School of Engineering Cranfield University Bedfordshire, UK;

    School of Engineering Cranfield University Bedfordshire, UK;

    School of Engineering Cranfield University Bedfordshire, UK;

    School of Engineering Cranfield University Bedfordshire, UK;

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