Inviscid and viscous aerodynamics of dense gases
Inviscid and viscous aerodynamics of dense gases
复制标题
稠密气体的无粘性和粘性空气动力学
DOI：
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发表时间：
2007
影响因子：
3.7
通讯作者：
P. Congedo
中科院分区：
文献类型：
--
作者：
P. Cinnella;P. Congedo
本文对Bethe-Zel'dovich-Thompson（BZT）型稠密气体跨音速和低超音速流动进行了数值研究。BZT气体表现出，在一系列的热力学条件接近的液体/蒸汽共存曲线，负值的基本导数的气体动力学。在跨音速和超音速区域，这可能导致非经典气体动力学行为，例如稀疏激波、混合激波/扇波和激波分裂。在目前的工作中，无粘和粘性流动的BZT流体过去的翼型研究使用精确的热物理模型的气体接近饱和条件和三阶中心的数值方法。分析了上游运动学和热力学条件对流态和翼型气动性能的影响，并指出了使用非常规工质可能带来的优点。
A numerical investigation of transonic and low-supersonic flows of dense gases of the Bethe–Zel'dovich–Thompson (BZT) type is presented. BZT gases exhibit, in a range of thermodynamic conditions close to the liquid/vapour coexistence curve, negative values of the fundamental derivative of gasdynamics. This can lead, in the transonic and supersonic regime, to non-classical gasdynamic behaviours, such as rarefaction shock waves, mixed shock/fan waves and shock splitting. In the present work, inviscid and viscous flows of a BZT fluid past an airfoil are investigated using accurate thermo-physical models for gases close to saturation conditions and a third-order centred numerical method. The influence of the upstream kinematic and thermodynamic conditions on the flow patterns and the airfoil aerodynamic performance is analysed, and possible advantages deriving from the use of a non-conventional working fluid are pointed out.