喷嘴尾部流道的流场分析及结构优化  

Flow Field Analysis and Structure Optimization of the Nozzle Tail Flow

作　　者：付必伟[1] 艾雨 席燕卿 

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]中国民航西南地区空中交通管理局,四川省成都市双流机场,四川成都610202 [3]中国石油吐哈油田公司鲁克沁采油厂,新疆鄯善838200

出　　处：《高压物理学报》2016年第4期328-334,共7页Chinese Journal of High Pressure Physics

基　　金：中国石油2008年重点项目(2008C-2800)

摘　　要：喷嘴是水力水平钻孔设备的核心元件,改善其结构有利于提高低渗透油气资源开采的施工效率。因此基于计算流体动力学(CFD)技术,分析尾部流道结构参数对射流流场的影响,得出以下结论:尾部流道数N=6、倾角α满足15°<α<30°,喷嘴出口直径d=1.4mm时,喷嘴的破岩和排屑性能较好;合理设计N和d,有利于实现喷嘴自推进和射流破岩两项功能;合理设计α,能有效改善尾部流道的磨损情况,延长喷嘴使用寿命。The nozzle is the core component of a hydraulic horizontal drilling equipment,and optimizing its structure is crucial for helping to improve the construction efficiency of exploiting low permeability oil and gas resources.Based on the computational fluid dynamics（CFD）approach,we studied the effects of the structural parameters of the tail flow（evenly distributed on the end of the nozzle）on the jet flow field.The results show that：when the number of the tail flow（N）is 6,with an angle（α）between 15°and 30°and a diameter（D）of 1.4mm,the nozzle exhibits good performance on the rock fragmentation and discharge;the reasonable design of Nand Dcontributes to implementing the nozzle propulsion and the rock destruction by jet;the reasonable design of the jet nozzle angleαcontributes to effectively reducing the abrasion of the jet nozzle and extending its service life.

关 键 词：计算流体动力学 水力喷射钻孔 尾部流道 喷嘴 数值模拟 

分 类 号：O357.5[理学—流体力学] F416.44[理学—力学]