Results show that the frequency spectrum characteristics of arc diffluence is accordance to jet fluctuation. Arc diffluence in the new gun is confined obviously.

试验结果表明，电弧分流和射流脉动的频谱特性是一致的，在使用新等离子体喷枪时，电弧分流明显得到了限制。

In order to explore the effect of ambient pressure on jet flow field in deep well and ultra-deep well, a physical model for flow field of confined water jet at bottom hole was established.

考虑到深井、超深井中井底围压对射流流场有一定的影响，建立了井底受限射流流场的物理模型。

A numerical study of a propulsive jet flow confined by bottom plane and against a flat plate is made.

本文对发射台底面与后挡板之间的喷流流场进行了数值研究。