摘要
采用CFD-DEM(Computational Fluid Dynamics with Discrete Element Method),模拟了磨料射流中颗粒在清水与0.2%(以质量分数计)胍胶溶液中的运动过程,研究了颗粒的运动轨迹、颗粒在喷嘴轴线位置处的速度变化情况、流体参数对射流扩散及颗粒空间分布的影响。在喷嘴收缩段内,胍胶溶液中的颗粒加速最快;在喷嘴外,随喷射距离的增加,胍胶溶液中心射流的速度衰减较快,清水中颗粒的减速较慢。在射流中心区域,与清水相比,胍胶溶液的射流中心处的颗粒占比相对较少,分布较为分散。研究结果表明,相比清水,胍胶溶液使得颗粒速度的加速更快,颗粒冲击能量更强,辅助钻井破岩的能力更强。
An algorithm of computational fluid dynamics with discrete element method(CFD-DEM)was applied to simulate the movement process of abrasive in water and non-Newtonian hydroxypropylguar gum solution.The trajectory of abrasive particles,the change of abrasive particles with the nozzle axis position,and the influence of fluid parameters on jet diffusion and the spatial distribution of abrasive particles were investigated.In the nozzle contraction section,the abrasive particles in the guar gum solution increased faster in the two fuild.On the nozzle outside,with the increase of spraying distance,the velocity of the central jet of guanidine gum solution decayed faster,and the deceleration of abrasive particles in clean water was the slowest.In the jet center area,compared with water,the particles at the jet center in hydroxypropylguar gum solution accounted for relatively less and were more dispersed.The conclusion showed that compared with water,hydroxypropylguar gum solution would accelerate the particle velocity faster and had stronger abrasive impact energy,which was more suitable for rock breaking in auxiliary drilling.
作者
刘昭辉
王治国
梁治国
刘阳
WANG Zhiguo;LIU Zhaohui;LIANG Zhiguo;LIU Yang(School of Mechanical Engineering,Xi’an Shiyou University,Xi’an 710065,China;Xianyang Special Equipment Laboratory,Xianyang 712000,China)
出处
《化工技术与开发》
CAS
2022年第3期1-4,27,共5页
Technology & Development of Chemical Industry
基金
国家自然科学基金项目(52074220,51906202)
西安石油大学研究生创新与实践能力培养计划项目(YCS19213114)。
