摘要
针对旋转水射流代替机械钻头破岩钻径向水平井的实际要求，运用数值模拟方法研究了旋转射流在井底的流动规律。结果表明，旋转射流的流动不同于普通圆射流，它的每一个质点都具有三维速度，射流能量不是集中在射流中心部位，而是集中在一定半径的圆环上，同时具有明显的扩散性，并在中心形成回流区。随着旋流强度的增大，射流扩散能力增强。数值模拟得到的流动规律与实验结果完全一致。
The flow characteristics of swirling jet in bottomhole was studied by developing PHOENICS soft wear. The swirling jet flows in a different way from the general round jet, and the jet energy is not concentrated on the jet center but on a ring with a certain diameter. The swirling jet diverges obviously, and the divergence increases with the raise of the swirl intensity. The simulated properties of the jet flow agree completely with the experimental results, which revealing the mechanism that the swirling jet can break a large area of rocks and has a high rock cutting efficiency.
出处
《石油大学学报（自然科学版）》
CSCD
1998年第6期46-49,共4页
Journal of the University of Petroleum,China(Edition of Natural Science)
基金
山东省自然科学基金
