喷嘴内螺纹结构对射流破裂长度的影响

刘禹; 施浙杭; 郝业峻; 王子钰; 赵辉; 刘海峰

doi:10.14135/j.cnki.1006-3080.20201228003

喷嘴内螺纹结构对射流破裂长度的影响

doi: 10.14135/j.cnki.1006-3080.20201228003

1.
华东理工大学上海煤气化工程技术研究中心，上海 200237
2.
上海空间推进研究所，上海 201112

基金项目: 国家重点研发计划(2018YFC0808500)；国家自然科学基金(21878095)

详细信息

作者简介:
刘禹：刘　禹(1996-)，男，江苏淮安人，硕士生，主要从事多相流气液雾化的研究。E-mail：y30180833@mail.ecust.edu.cn

通讯作者:
赵　辉，E-mail: zhaohui@ecust.edu.cn

中图分类号: O359⁺.1
计量
- 文章访问数: 406
- HTML全文浏览量: 235
- PDF下载量: 22
- 被引次数: 0
出版历程
- 收稿日期: 2020-12-28
- 网络出版日期: 2021-04-07
- 刊出日期: 2022-02-23

Effects of Nozzle Screw Structure on Breakup Length of Jet

1.
Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, China
2.
Shanghai Institute of Space Propulsion, Shanghai 201112, China

摘要

摘要: 使用高速相机研究了喷嘴螺纹结构对液体射流破裂长度的影响。采用5种不同直径(4.00、4.80、7.50、8.75、10.80 mm)的喷嘴进行实验，螺纹深度范围0.40~1.25 mm，液体射流雷诺数范围500~22 600。实验结果表明：当雷诺数小于1600时，液体射流破裂长度随着雷诺数的增加而增加，喷嘴螺纹结构对液体射流破裂长度的影响较小；随着雷诺数的增加，液体射流破裂长度先增加后减小，喷嘴螺纹结构的影响显著，带螺纹结构喷嘴的液体射流破裂长度小于光滑喷嘴的液体射流破裂长度；当雷诺数大于7000时，液体射流破裂长度随着雷诺数的增加而增加，喷嘴螺纹结构继续促进液体射流破裂长度的减小；同时，实验结果还表明喷嘴螺纹结构对小直径（直径小于5 mm）喷嘴的影响更显著。最后，以量纲为一螺纹深度、雷诺数和韦伯数为参数建立了液体射流破裂长度预测关系式。
- 破裂长度 /
- 螺纹结构 /
- 螺纹深度 /
- 液体射流 /
- 喷嘴
Abstract: The effects of nozzle screw structure on liquid jet breakup were investigated with a high-speed camera. Five nozzles with different diameters (4.00, 4.80, 7.50, 8.75 , 10.80 mm) were used in the experiment. The thread depth range was 0.40—1.25 mm, the liquid jet Reynolds number (Re) was within the scope of 500—22600, and the Weber number was within the scope of 0.0003—1.2000. The experimental results showed the screw structure had a strong disturbance to the jet and promoted the breakup of jet. By comparing the jet breakup length under different experimental conditions, it could be obtained that increasing Re led to the decrease of breakup length when Re<1 600. The structure of nozzle screw had little influence on the breakup length of liquid jet. The breakup length of liquid jet increased first and then decreased with Re raised. In this condition, the influence of screw structure of nozzle was significant, the breakup length was shorter than that of the smooth one. When Re>7 000, the breakup length of liquid jet rised with the increase of Re and the screw structure of nozzle continued to promote the decrease of the breakup length of liquid jet. The experimental results showed that the influence of nozzle screw structure on small diameter nozzle (diameter less than 5 mm) was more significant than that on the larger nozzle. By using dimensionless thread depth, Re and Weber number, the relationship for predicting the breakup length of liquid jet was established.
- breakup length /
- screw structure /
- thread depth /
- liquid jet /
- nozzle

HTML全文

图 1 实验装置(a) 和螺纹结构(b)示意图

1—Liquid storage; 2—Pump; 3—Valve; 4—Tube rotameter; 5—Nozzle; 6—High speed camera; 7—Computer

Figure 1. Schematic diagram of experimental setup (a) and nozzle structure (b)

下载: 全尺寸图片幻灯片

图 2 光滑喷嘴（左）和螺纹喷嘴（右）射流对比

Figure 2. Jet comparison of smooth nozzle(left) and screw structure nozzle(right)

下载: 全尺寸图片幻灯片

图 3 直径脉动与采样时间关系图（u_l=2.31 m/s，Re=22 600)

Figure 3. Relationship of diameter pulsation and sampling time(u_l=2.31 m/s, Re=22600)

下载: 全尺寸图片幻灯片

图 4 喷嘴液体射流直径脉动能谱图（u_l=2.31 m/s， Re=22 600)

Figure 4. Energy spectra of nozzle liquid jet diameter pulsation (u_l=2.31 m/s, Re=22 600 )

下载: 全尺寸图片幻灯片

图 5 液体射流破裂长度示意图

Figure 5. Schematic diagram of breakup length of liquid jet

下载: 全尺寸图片幻灯片

图 6 不同喷嘴射流破裂长度随Re变化趋势图(拟合曲线来自公式8、10、11)

Figure 6. Trend diagram of different nozzle jet breakup length changing with Re (fitting curve from formula 8, 10, 11)

下载: 全尺寸图片幻灯片

图 7 量纲为一射流破裂长度分区

Figure 7. Dimensionless jet fracture length partition

下载: 全尺寸图片幻灯片

图 8 螺纹喷嘴9在不同Re时的工况射流对比

Figure 8. Screw nozzle 9 jet comparison with different Re

下载: 全尺寸图片幻灯片

表 1 实验喷嘴尺寸

Table 1. Size of experimental nozzle

No. D/mm a /mm X

1 4.00 0 0
2 4.00 0.40 0.10
3 4.80 0 0
4 4.80 0.45 0.09
5 7.50 0 0
6 7.50 0.10 0.01
7 7.50 0.75 0.10
8 8.75 0 0
9 8.75 1.00 0.11
10 10.80 0 0
11 10.80 1.25 0.12

下载: 导出CSV

参考文献(32)

[1]	LASHERAS J C, HOPFINGER E J. Liquid jet instability and atomization in a coaxial gas stream[J]. Annual Review of Fluid Mechanics, 1998, 32(1): 275-308.
[2]	DESHPANDE S S, GURJAR S R, TRUJILLO M F. A computational study of an atomizing liquid sheet[J]. Physics of Fluids, 2015, 27(8): 082018.
[3]	KANG Z, LI Q, CHENG P, et al. Effects of self-pulsation on the spray characteristics of gas-liquid swirl coaxial injector[J]. Acta Astronautica, 2016, 127: 249-259. doi: 10.1016/j.actaastro.2016.05.038
[4]	吴炬晖, 章文斌, 赵辉, 等. 表面活性剂对二次雾化袋状破裂特性的影响[J]. 华东理工大学学报(自然科学版), 2016, 42(3): 329-334.
[5]	MITCHELL B R, KLEWICKI J C, KORKOLIS Y P, et al. Normal impact force of Rayleigh jets[J]. Physical Review Fluids, 2019, 4(11): 113603. doi: 10.1103/PhysRevFluids.4.113603
[6]	KOURMATZIS A, MASRI A R. Air-assisted atomization of liquid jets in varying levels of turbulence[J]. Journal of Fluid Mechanics, 2014, 764: 95-132.
[7]	RAYLEIGH L. On the instability of jets[J]. Proceedings of the London Mathematical Society, 1878, 10(1): 4-13.
[8]	WEBER C. Zum zerfall eines flüssigkeitsstrahles[J]. Zeitschrift fur Angewandte Mathematik und Mechanik, 1931, 11: 136-141.
[9]	LEFEBVRE A H. Atomization and Sprays[M]. New York: Hemisphere Publishing Corporation, 1988.
[10]	BIROUK M, LEKIC N. Liquid jet breakup in quiescent atmosphere: A review[J]. Atomization and Spray, 2009, 19(6): 501-528. doi: 10.1615/AtomizSpr.v19.i6.20
[11]	赵志伟, 苏永升. 不同出口角度扩压器的内部流动及离心压缩机级性能数值研究[J]. 华东理工大学学报(自然科学版), 2017, 43(2): 266-272.
[12]	吴兆伟, 施浙杭, 赵辉, 等. 表面张力变化对含气泡液体射流破裂的影响[J]. 化工学报, 2021, 72(3): 1283-1294.
[13]	VAN HOEVE W, GEKLE S, SNOEIJER J H, et al. Breakup of diminutive Rayleigh jets[J]. Physics of Fluids, 2010, 22(12): 122003. doi: 10.1063/1.3524533
[14]	ARAI M, AMAGAI K. Surface wave transition before breakup on a laminar liquid jet[J]. Internationl Journal of Heat and Fluid Flow, 1999, 20(5): 507-512. doi: 10.1016/S0142-727X(99)00039-9
[15]	SALVADOR F J, RUIZ S, CRIALESI-ESPOSITO M, et al. Analysis on the effects of turbulent inflow conditions on spray primary atomization in the near-field by direct numerical simulation[J]. International Journal of Multiphase Flow, 2018, 102: 49-63. doi: 10.1016/j.ijmultiphaseflow.2018.01.019
[16]	石仲璟, 王学生, 陈琴珠. 乙氧基化反应喷嘴雾化和反应性能[J]. 华东理工大学学报(自然科学版), 2017, 43(2): 273-279.
[17]	MARMOTTANT P, VILLERMAUX E. On spray formation[J]. Journal of Fluid Mechanics, 2004, 498: 73-111. doi: 10.1017/S0022112003006529
[18]	李建昌, 李宏宇, 陈建, 等. 喷嘴结构对真空喷射雾化性能影响研究[J]. 真空科学与技术学报, 2014, 34(2): 101-105. doi: 10.3969/j.issn.1672-7126.2014.02.01
[19]	ETZOLD M, DESWAL A, CHEN L, et al. Break-up length of liquid jets produced by short nozzles[J]. International Journal of Multiphase Flow, 2018, 99: 397-407. doi: 10.1016/j.ijmultiphaseflow.2017.11.006
[20]	GONG C, OU M, JIA W. The effect of nozzle configuration on the evolution of jet surface structure[J]. Results in Physics, 2019, 15: 102572. doi: 10.1016/j.rinp.2019.102572
[21]	LI Y, SISOEV G M, SHIKHMURZAEV Y D. On the breakup of spiralling liquid jets[J]. Journal of Fluid Mechanics, 2019, 862: 364-384. doi: 10.1017/jfm.2018.956
[22]	UDDIN J, DECENT S P, SIMMONS M J H. Non-linear waves along a rotating non-Newtonian liquid jet[J]. International Journal of Engineering Science, 2008, 46(12): 1253-1265. doi: 10.1016/j.ijengsci.2008.06.016
[23]	PĂRĂU E I, DECENT S P, KING A C, et al. Nonlinear travelling waves on a spiralling liquid jet[J]. Wave Motion, 2006, 43(7): 599-618. doi: 10.1016/j.wavemoti.2006.05.004
[24]	DECENT S P, KING A C, SIMMONS M J H, et al. The trajectory and stability of a spiralling liquid jet: Viscous theory[J]. Applied Mathematical Modelling, 2009, 33(12): 4283-4302. doi: 10.1016/j.apm.2009.03.011
[25]	SHIKHMURZAEV Y D, SISOEV G M. Spiralling liquid jets: Verifiable mathematical framework, trajectories and peristaltic waves[J]. Journal of Fluid Mechanics, 2017, 819: 352-400. doi: 10.1017/jfm.2017.169
[26]	REZAYAT S, FARSHCHI M, GHORBANHOSEINI M. Primary breakup dynamics and spray characteristics of a rotary atomizer with radial-axial discharge channels[J]. International Journal of Multiphase Flow, 2019, 111: 315-338. doi: 10.1016/j.ijmultiphaseflow.2018.10.001
[27]	LIU C, LIU F, YANG J, et al. Experimental investigations of spray generated by a pressure swirl atomizer[J]. Journal of the Energy Institute, 2019, 92(2): 210-221. doi: 10.1016/j.joei.2018.01.014
[28]	SIKRORIA T, KUSHARI A. Experimental analysis and phenomenological model for liquid jet breakup in swirling flow of air[J]. Journal of Engineering for Gas Turbines and Power, 2019, 141(9): 091015. doi: 10.1115/1.4044060
[29]	LU H, LIU H F, LI W F, et al. Bubble formation in an annular granular jet dispersed by a central air round jet[J]. AIChE Journal, 2013, 59(6): 1882-1893. doi: 10.1002/aic.13974
[30]	戴干策, 陈敏恒. 化工流体力学[M]. 北京: 化学工业出版社, 2005.
[31]	HASSLBERGER J, KETTERL S, KLEIN M, et al. Flow topologies in primary atomization of liquid jets: A direct numerical simulation analysis[J]. Journal of Fluid Mechanics, 2018, 859: 819-838.
[32]	EGGERS J, VILLERMAUX E. Physics of liquid jets[J]. Reports on Progress in Physics, 2008, 71(3): 036601. doi: 10.1088/0034-4885/71/3/036601