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Numerical investigation of H-2 injection in Mach 5 air flow with a strong shock/boundary layer interaction

机译：具有强烈冲击/边界层相互作用的5马赫气流中H-2注入的数值研究

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A numerical study of the hydrogen injection has been investigated in a flow configuration obtained from the interaction of two axisymmetric oblique shock waves produced by a conical ring and a centre-body. This configuration, due to a strong shock/boundary layer interaction, was named a viscous mach interaction (VMI). The geometry which leads to this configuration can be used as a hypersonic inlet, and as this inlet could be axisymmetric or two-dimensional, a first result was to show that this VMI configuration exists in both cases. Different injection locations in the subsonic zone are tested in order to keep this VMI configuration . The influence of the hydrogen injection on the mixing flow behavior is analyzed. The numerical results show that the equivalence ratio Phi of the gas-mixture is high enough in order to have a non-reactive gas close to the wall which keeps constant the hydrogen temperature along the centre-body. Thus, the hydrogen injection can play the role of a forward-facing jet reducing heat-transfer at the centre-body wall.
机译：氢注入的数值研究已经在由圆锥形环和中心体产生的两个轴对称倾斜冲击波相互作用的流动构型中进行了研究。由于强烈的冲击/边界层相互作用，此配置被称为粘性马赫相互作用（VMI）。导致这种配置的几何形状可以用作超音速进气口，并且由于该进气口可以是轴对称的或二维的，因此第一个结果是证明在两种情况下都存在此VMI配置。测试了亚音速区域中的不同注入位置，以保持此VMI配置。分析了氢气注入对混合流动行为的影响。数值结果表明，气体混合物的当量比Phi足够高，以使非反应性气体靠近壁，从而使沿中心体的氢气温度保持恒定。因此，氢的注入可以起到减少流体在中心体壁处传热的作用。

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