[1]张井龙,刘崇江,许红丽,等.旋转变径管内螺旋流相干结构的大涡模拟研究[J].地震工程与工程振动,2019,39(06):038-45.[doi:10.13197/j.eeev.2019.06.38.zhangjl.006]
 ZHANG Jinglong,LIU Chongjiang,XU Hongli,et al.Large eddy simulation of coherent structure of spiral flow in a rotating reducing pipe[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2019,39(06):038-45.[doi:10.13197/j.eeev.2019.06.38.zhangjl.006]
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旋转变径管内螺旋流相干结构的大涡模拟研究
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《地震工程与工程振动》[ISSN:/CN:]

卷:
39
期数:
2019年06
页码:
038-45
栏目:
论文
出版日期:
2019-12-31

文章信息/Info

Title:
Large eddy simulation of coherent structure of spiral flow in a rotating reducing pipe
作者:
张井龙12 刘崇江3 许红丽4 王尊策12
1. 东北石油大学 机械科学与工程学院, 黑龙江 大庆 163318;
2. 黑龙江省石油石化多相介质处理及污染防护重点实验室, 黑龙江 大庆 163318;
3. 大庆油田有限责任公司采油工程研究院, 黑龙江 大庆 163453;
4. 大庆油田有限责任公司第一采油厂地质大队, 黑龙江 大庆 163000
Author(s):
ZHANG Jinglong12 LIU Chongjiang3 XU Hongli4 WANG Zunce12
1. College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China;
2. Key Laboratory of Petroleum and Petrochemical Multiphase Media Treatment and Pollution Protection of Heilongjiang, Daqing 163318, China;
3. Daqing Oil Field Co., LTD. Oil Production Engineering Research Institute, Daqing 163453, China;
4. Geological Brigade, No.1 Oil Production Company, Daqing Oilfield Limited Company, Daqing 163000, China
关键词:
变径圆管旋转壁面LESQ准则POD
Keywords:
a reducing piperotating wallLESQ-criterionPOD
分类号:
TH137
DOI:
10.13197/j.eeev.2019.06.38.zhangjl.006
摘要:
旋转管式分离设备的主分离段一般为变径管结构,针对其内部螺旋流的研究主要集中在平均统计量的分布规律上,缺乏从流动结构角度的描述。本文采用大涡模拟方法对不同旋转条件下变径管内螺旋流开展数值模拟研究,分别以Q准则与基于SVD方法的POD分解法,对数值计算的速度场进行了分析。Q准则等值面显示,螺旋涡从大锥段开始发生破碎,旋转效应能够减弱外涡流区的漩涡强度;POD分解重构后脉动速度场显示,脉动速度场的1阶模态为主模态,包含了湍流的大部分能量,5阶模态之后的流动为由小尺度涡构成的复杂湍动结构。旋转效应抑制了径向涡,促进了轴向涡。从流场结构的角度而言,旋转效应对分离起到了积极的作用。
Abstract:
The main separation section of rotating pipe separation equipment is reducing pipe. The research on spiral flow in reducing pipe mainly focuses on the distribution law of average statistics. In this paper, large eddy simulation method is used to study on spiral flow in a reducing pipe under different rotating conditions. The velocity field of numerical calculation is analyzed by Q-criterion and POD decomposition method based on SVD method respectively. The results of Q criterion show that the spiral vortex starts to break from the large cone section, and the rotation effect can weaken the vortex strength in the outer vortex region. The fluctuation velocity field after POD decomposition and reconstruction shows that the first order mode of the fluctuation velocity field is the main mode, containing most of the turbulent energy, and the flow after the fifth order mode is a complex turbulent structure composed of small-scale vortices. The rotation effect suppresses the radial vortex and promotes the axial vortex. From the point of view of flow field structure, rotation effect plays a positive role in separation.

参考文献/References:

[1] 徐艳, 张彦月, 张井龙, 等.基于LES方法的壁面旋转旋流分离器内流特性的研究[J].流体机械, 2017, 45(8):1-5. XU Yan, ZHANG Yanyue, ZHANG Jinglong, et al. Research on inner flow characteristics of wall rotating hydrocyclone separator based on LES method[J]. Fluid machinery, 2017, 45(8):1-5.(in Chinese)
[2] 张济民. 湍流有旋流冷态流场及扩散火焰的大涡模拟[D].合肥:中国科学技术大学, 2013. ZHANG Jimin. Lrage eddy simulation of turbulent non-reactive swirling flow and diffusion flames[D]. Hefei:University of Science and Technology of China, 2013.(in Chinese)
[3] Delgadillo J A, Rajamani R K. A comparative study of three turbulence-closure models for the hydrocyclone problem[J]. International Journal of Mineral Processing, 2005, 77(4):217-230.
[4] Jeong J J J, Hussain F. On the identification of a vortex[J]. Journal of Fluid Mechanics, 1995, 332(1):339-363.
[5] 张宏达, 张济民, 韩超, 等.大涡模拟研究钝体有旋流流场的拟序结构[J].航空学报, 2014, 35(7):1854-1864. ZHANG Hongmin, ZHANG Jimin, HAN Chao, et al. Coherent structures of flow fields in swirling flow around a bluff-body using large eddy simulation[J]. Acta Aeronautica et Astronautica Sinica, 2014, 35(7):1854-1864.(in Chinese)
[6] 董春红. 圆管螺旋流近壁相干结构与减阻性能研究[D].大庆:东北石油大学, 2017. DONG Chunhong.Study on near wall coherent structure and drag reduction performance of helical flow in a circular tube[D]. Daqing:Northeast Petroleum University, 2017.(in Chinese)
[7] Berkooz G, Holmes P, Lumley J L. The proper orthogonal decomposition in the analysis of turbulent flows[J]. Annual Review of Fluid Mechanics, 1993, 25(1):539-575.
[8] Holmes P. Turbulence, Coherent Structures, Dynamical Systems And Symmetry[M]. Cambridge Un