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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Numerical simulation of a hypersonic flow past a blunt body
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Numerical simulation of a hypersonic flow past a blunt body

机译：高超声速流过钝体的数值模拟

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Purpose - The purpose of this paper is to explore the characteristics of hypersonic flow past a blunt body. Design/methodology/approach - The implicit finite volume schemes are derived from axisymmetric Navier-Stokes equations by means of AUSM+ and LU-SGS methods, and programmed in FORTRAN. Based on the verified result that a 2D axisymmetric chemical equilibrium flow has a good agreement with the literature, the characteristics of hypersonic flow past a sphere are simulated by using four different models which involve four factors, namely, viscous, inviscid, equilibrium and calorically perfect gas. Findings - Compared with the calorically perfect gas under hypervelocity condition, the shock wave of the equilibrium gas is more close to the blunt body, gas density and pressure become bigger, but gas temperature is lower due to the effect of real gas. Viscous effects are not obvious in the calculations of the equilibrium gas or the calorically perfect gas. In a word, the model of equilibrium gas is more suitable for hypersonic flow and the calculation of viscous flow has a smaller error. Originality/value - The computer codes are developed to simulate the characteristics of hypersonic flows, and this study will be helpful for the design of the thermal protection systemin hypersonic vehicles.
机译：目的-本文的目的是探索经过钝体的高超声速流动的特征。设计/方法/方法-隐式有限体积方案是通过AUSM +和LU-SGS方法从轴对称Navier-Stokes方程派生的，并在FORTRAN中进行编程。根据二维轴对称化学平衡流与文献的验证结果，采用四个不同的模型来模拟流过球体的高超声速流动特性，其中涉及粘性，无粘性，平衡和热量完美四个因素加油站。发现-与超高速条件下的热量完美气体相比，平衡气体的冲击波更接近钝体，气体密度和压力变大，但是由于实际气体的作用，气体温度较低。在平衡气体或热量完美气体的计算中，粘性作用并不明显。一言以蔽之，平衡气体模型更适合于高超声速流，粘性流的计算误差较小。原创性/价值-开发计算机代码来模拟高超音速流动的特性，这项研究将有助于高音速飞行器的热保护系统的设计。

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