Abstract—

The computational results of the weak planar shock–elliptical light gas bubble interaction are presented. The influence of different light gases (helium and neon) on the interaction process is clarified using high-resolution computation schemes. It is found that the helium gas bubble is easier to be compressed than the neon gas bubble owing to its smaller density and the helium gas bubble can be split into two, upper and lower, parts by the inward air jet, which is not the case for the neon gas bubble. The area of the helium gas bubble decreases in the incident and reflected shock compression stages and increases in the expansion stages behind the shock waves. At the same time, the neon gas bubble area decreases in the four stages, which is mainly due to the fact that the average vorticity intensity increases, as the gas density decreases. Further, the factors affecting the vorticity evolution are also analyzed and it is revealed that the compression term has a relatively stronger influence on the vorticity evolution than the other two terms in the helium and neon gas bubbles, but in the expansion stage behind the incident shock the influence of viscosity is stronger than the baroclinic effect in the neon gas bubble.

中文翻译：

---

弱平面激波——椭圆轻气泡在激波和再激波加速流中相互作用的数值研究

摘要——

给出了弱平面激波-椭圆轻气泡相互作用的计算结果。使用高分辨率计算方案阐明了不同轻气体（氦气和氖气）对相互作用过程的影响。发现氦气泡比氖气泡更容易被压缩，因为它的密度较小，而且氦气泡可以被向内的空气射流分成上下两部分，但事实并非如此。对于霓虹气泡。氦气泡的面积在入射和反射激波压缩阶段减小，而在激波后的膨胀阶段增大。同时，氖气泡面积在四个阶段都减小，这主要是由于平均涡度强度随着气体密度的减小而增大。更多，