It has shown from the experimental results that the vorticity near the jetboundary region is high in magnitude due to the interaction between the jet fluid and the entrained ambient fluid.
结果表明，由于射流的卷吸及其与环境流体之间的相互作用，使得射流边界处具有很高的涡量；
2
Based on the boundary condition of jet flow in a niche and the interaction of jet with air current, a pressurization relation equation have been established.
It is proved that the uniform density hypothesis is the sufficiency condition for the proportional expansion hypothesis under the existence of the breech boundary motion and the mass jet.