摘要
为了解决磨料射流固、液两相流场运动对割缝效果的影响问题,采用数值模拟的方法,通过建立磨料射流固、液两相流场的数学模型,研究了磨料两相射流割缝的速度场和流动场规律。结果表明:磨料射流中割缝速度可达100 m/s左右,有利于有效割缝;有效割缝需要入射压力至少达到25 Mpa;磨料射流割缝过程中会形成了一道"水墙"阻止磨料射流全部高速射出。产生二次回流。虽然二次加速的效果有限,但二次循环的水和颗粒经过二次加速能够再一次对壁面形成高速打击,提高割缝效率。研究成果对磨料两相射流割缝提高油井采收率具有指导意义。
In order to understand the impact on abrasive hydraulic slotting by liquid-solid two phase flow field, this study has developed a mathematical model of liquid-solid two phase flow field for abrasive water jet, and investigated the velocity field and fluid field of abrasive hydraulic slotting. The study shows that the cutting speed using abrasive water jet can reach approaximately 100 m/s, which is benefical to slot cutting. The incident pressure for an effective slotting is at least 25Mpa. A ＂water wall＂ will be formed during the abrasive hydraulic slotting which arrests the high-speed abrasive granules, engender the secondary reverse current. Although the effect of the second acceleration were limited, the recirculate water and granules engender hypervelocity impact on wall face by the second acceleration, which can increase the efficiency of slotting. The findings in this study can provide a guide for improving oil recovery using abrasive hydraulic slotting.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2011年第3期385-388,共4页
Journal of Liaoning Technical University (Natural Science)
基金
辽宁省教育厅基金资助项目(05L167)
关键词
磨料射流
两相流
割缝
数值模拟
回流
abrasive water jet
liquid-solid two-phase flow
slotting
numerical simulation
reverse current
