流体机械Issue(7)：32-36,41,6.DOI:10.3969/j.issn.1005-0329.2015.08.007
新型旋转射流多孔喷嘴流场的分析
Flow Field Study on a New Kind Swirling Multi-orifices Nozzle
摘要
Abstract
A new kind swirling multi-orifices nozzle for radial horizontal drilling technology was presented.There were three for-ward orifices with different tangential inclination uniformly distributed in the front face.The inclination angles were 15°,30°and 45°.Three dimensional flow fields of the nozzle were simulated in terms of RNG k -ε turbulent model,also compared with the ex-periment result.The result shows that the 15°orifice has larger axial velocity and poor diffusivity,so the velocity decays just like the normal jetting and the efficiency of rock breaking is moderate;the 30°orifice has larger axial velocity,radial velocity,tangential velocity and moderate diffusivity,so the velocity decays slowly and high efficiency of rock breaking can be gained;the 45°orifice has largest radial velocity,tangential velocity and diffusivity,so the velocity seriously decays and large area rock can be broken with limited depth;the area of rock breaking of the three orifices covers each other,so when the nozzle swirls the rock breaking can be completed by the track scanning way;different inclination angle has different rock breaking rate,the 30°has the highest rate in this experiment.The simulation result is almost consistent with the experiment result.关键词
径向水平井/旋转射流/多孔喷嘴/流场分析Key words
radial horizontal drilling/swirling jet/multi-orifices nozzle/flow field study分类
机械制造引用本文复制引用
李敬彬,李根生,黄中伟,宋先知,李奎..新型旋转射流多孔喷嘴流场的分析[J].流体机械,2015,(7):32-36,41,6.基金项目
国家科技重大专项（2011ZX05036002）；国家科技重大专项 （）
