论文标题
非疗法 - 途中超音速内流的中心线休克反射现象：超膨胀的超音速微型jets
Centreline shock reflection phenomena for Supersonic Internal Flows in the non-Rankine-Hugoniot zone: Overexpanded Supersonic Microjets
论文作者
论文摘要
已经通过完全耦合的基于压力的冲击捕获方案来研究了在过度膨胀的轴对称微射流中对中心线冲击反射的粘性和稀疏影响。由于较低的自由流雷诺数（re $ \ $ \ $ \ $ 7），因此Navier-Stokes方程与滑动速度和温度跳跃边界条件相结合，以考虑Knudsen层中稀有气体效应。已经发现，明显的粘度水平会导致从三震（三震（三击）到两震构型的过渡，这是由无关理论不允许的。这提供了新的证据，以支持轴对称环楔摄入量的最新观察结果。对冯·诺伊曼（Von Neumann）和脱离标准的分析表明，从马赫反射到常规反射的过渡类似于平面冲击的双分解域转变。另外，从数学角度进行了对入射冲击的纵向曲率的预测。
The viscous and rarefaction effects on centreline shock reflection occurring in an overexpanded axisymmetric microjet have been investigated numerically by means of a fully coupled pressure-based shock capturing scheme. Due to the low free-stream Reynolds number (Re $\approx$ 7), the Navier-Stokes equations were coupled with slip velocity and temperature jump boundary conditions to account for rarefied gas effects in the Knudsen layer. It has been found that pronounced viscosity levels can cause a transition from a three-shock to a two-shock configuration, which is impermissible by inviscid theory. This provides novel evidence that supports recent observations for axisymmetric ring wedge intakes. Analysis of the von Neumann and detachment criteria indicates that the transition from Mach reflection to regular-like reflection is analogous to the dual-solution domain transition for planar shocks. In addition, prediction of the longitudinal curvature of the incident shock has been conducted from a mathematical standpoint.
