首页|斜螺旋式旋转空化喷嘴性能仿真研究

斜螺旋式旋转空化喷嘴性能仿真研究

扫码查看
针对旋转空化喷嘴(Spin Cavitation Nozzle,SCN)开采天然气水合物时能耗高、效率低的问题,设计了一种斜螺旋式旋转空化喷嘴(Oblique Spiral type Spin Cavitation Nozzle,OSSCN).基于 CFD 方法,对 OSSCN、SCN 以及收缩-扩张型喷嘴(Contraction-Dilatation Cavitation Nozzle,CDCN)进行性能对比分析.仿真分析结果表明:与 CDCN 相比,OSSCN 和SCN流场中空化泡的分布更广泛、空化性能更优,且对水合物碎片有着更强的卷吸能力;与SCN相比,OSSCN在水合物壁面处产生的液压冲击能量更大,其径向流速更高,对水合物壁面产生的冲蚀效果更佳;OSSCN的斜螺旋叶轮结构极大地降低了喷嘴液阻、减小了能耗,在与SCN性能相差不大的情况下,OSSCN较SCN降低了约39%的能耗,展现出高效节能的优势.该设计可为空化射流钻水平井+衬管完井技术的商业化应用提供技术支持.
Simulation Study on the Performance of Oblique Spiral Type Spin Cavitation Nozzle
Exploitation of natural gas hydrate using spin cavitation nozzle(SCN)is challenged by the prob-lems such as high energy consumption and low efficiency.To solve these problems,an oblique spiral type spin cavitation nozzle(OSSCN)was designed.Based on the computational fluid dynamics(CFD)method,the per-formances of OSSCN,SCN and contraction-dilatation cavitation nozzle(CDCN)were analyzed by simulation.The results show that compared with CDCN,OSSCN and SCN have a wider distribution of cavitation bubbles in the flow field,better cavitation performance and stronger entrainment capacity for hydrate fragments.Compared with SCN,OSSCN has a higher radial flow velocity and generates greater hydraulic impact energy at the hydrate wall,resulting in better erosion effect on the hydrate wall.The oblique spiral impeller structure of OSSCN greatly reduces the liq-uid resistance of the nozzle and the energy consumption.When the performance is not significantly different from SCN,OSSCN reduces energy consumption by about 39%compared to SCN,demonstrating an advantage of high efficiency and energy conservation.This innovative design provides technical support for the commercial application of cavitation jet drilling horizontal well+liner completion technology.

cavitating jet drillingspin cavitation nozzleoblique helicoidnatural gas hydratecomputation-al fluid dynamics(CFD)jet erosioncavitation performanceentrainment performance

陈效平、何志鹏、刘广力、敖鑫、文学、刘志辉

展开 >

邵阳学院高效动力系统智能制造湖南省重点实验室

西华大学机械工程学院

空化射流钻井 旋转空化喷嘴 斜螺旋面 天然气水合物 计算流体力学 射流冲蚀 空化性能 卷吸性能

西华大学人才引进项目邵阳学院研究生科研创新项目邵阳维克液压股份有限公司企业横向项目

Z17119-0303CX2023SY0812023HX46

2024

石油机械
中国石油天然气集团公司装备制造分公司 中国石油学会石油工程专业委员会 江汉机械研究所 江汉石油管理局

石油机械

CSTPCD北大核心
影响因子:0.737
ISSN:1001-4578
年,卷(期):2024.52(9)