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在前期证明导向叶轮式喷嘴所产生的旋转射流具有较强的破岩成孔能力的基础上，本文对旋转射流的运动规律进行了实验研究。结果表明：旋转射流的速度及压力分布特性明显不同于普通圆射流，在近喷嘴范围内其速度剖面、压力剖面和轴向速度剖面均呈现“M”形分布的特点，切向速度剖面呈现“N”形分布的特点；随着射流向前喷射，射流的横断面不断向外扩散，其速度和压力剖面变得越来越平缓，衰减较快；旋转射流截面最大轴向速度和切向速度与喷距的负指数成正比关系衰减。表明该旋转射流相对于普通圆射流具有较强的横向扩散能力和较弱的轴向传递能力，为合理设计和利用旋转射流提供了依据。
On the basis of proving that the rotating jet produced by the guide vane nozzle has a strong ability of rock breaking, the experimental study on the movement law of the rotating jet is carried out in this paper. The results show that the velocity and pressure distribution of the rotating jet are obviously different from those of the ordinary circular jet. The velocity profile, pressure profile and axial velocity profile of the jet show an “M” shape distribution in the vicinity of the nozzle. The tangential velocity profile shows " As the jet jet forwards, the cross-section of the jet continues to diffuse outwards, its velocity and pressure profile become more and more gentle and decay rapidly; the maximum axial velocity and the tangential velocity of the rotating jet cross section Negative exponents and spray distance proportional to the decline. The results show that the rotating jet has stronger lateral diffusivity and weaker axial transmission ability than ordinary circular jet, which provides a basis for the rational design and utilization of rotating jet.