流向强迫作用下的液体初始雾化机制及动力学特征

doi:10.13675/j.cnki.tjjs.190155

推进技术 ›› 2020, Vol. 41 ›› Issue (2): 353-361.DOI: 10.13675/j.cnki.tjjs.190155

流向强迫作用下的液体初始雾化机制及动力学特征

陈潜¹,邹建锋¹,周程林¹,袁炎炎¹

浙江大学航空航天学院, 浙江杭州 310027

发布日期:2021-08-15
作者简介:陈潜，硕士生，研究领域为液体燃料射流数值模拟。E-mail： chenqian1994@zju.edu.com
基金资助:
国家自然科学基金（11372276；11432013；11272285）；国家自然科学基金委员会-广东省人民政府联合基金（第二期）超级计算科学应用研究专项资助。

Initial Atomization Mechanism and Dynamic Characteristics of Liquid with Forced Perturbation

School of Aeronautics and Astronautics,Zhejiang University, Hangzhou 310027, China

Published:2021-08-15

摘要/Abstract

摘要： 使用Volume of fluid（VOF）方法和基于树形数据结构的自适应算法来研究射流雾化的破碎过程以及扰动对射流破碎机理产生的影响。在无扰动情况下，液体射流的头部、液丝和液滴随着射流时间的发展不断发生演变。射流头部先呈现蘑菇状外形，随后液丝生成，并慢慢转变成网兜状，直至断裂形成小液滴。在周期性流向强迫的作用下，射流液柱的表面会形成周期波，其液丝破裂形成液滴的时机与稳定射流情形相比会有所提前，射流形成的头部更趋于扁平，最终生成的液滴数量更多。低中频阶段，随着扰动频率的增大，射流未扰动液柱长度（ L）逐渐缩短，液滴直径的概率密度分布（ PDF）趋于尖锐，液滴平均直径（ SMD）增大。在高频阶段，随着扰动频率的增大， L会随之增大，液滴直径的 PDF分布变得平缓， SMD会减小。

关键词: 燃烧室;射流破碎;扰动波;雾化;频率;液滴

Abstract: To investigate the breakup process of jet atomization and the effects of disturbance on the jet, the volume of fluid (VOF) method and the adaptive algorithm based on tree data structure are used to simulate the atomization process. The tip, the liquid filaments and the droplets in undisturbed liquid jet change continuously with the evolution of the jet time. First, the tip appears in a mushroom shape, then the liquid filaments appear, and gradually become a thin-net shape. The liquid filaments slowly become small droplets, and the droplets spread upstream around the tip. The perturbation frequency forces on the jet and produces a periodic wave on the surface of the liquid column. Compared with the steady velocity jet, the liquid filaments form droplets earlier, the tip is flatter, and the number of droplets is larger. In the low-middle frequency phase, as the disturbance frequency increases, the non-perturbed length ( L) gradually decreases, probability density function ( PDF) distribution of the droplet diameter tends to be sharp, Sauter mean diameter ( SMD) increases. In the high frequency phase， as the disturbance frequency increases, L gradually increases, PDF of the droplet diameter tends to be smooth and SMD decreases.

Key words: Combustor;Jet breakup;Disturbing wave;Atomization;Frequency;Droplet

陈潜,邹建锋,周程林,袁炎炎. 流向强迫作用下的液体初始雾化机制及动力学特征[J]. 推进技术, 2020, 41(2): 353-361.

CHEN Qian¹,ZOU Jian-feng¹,ZHOU Cheng-lin¹,YUAN Yan-yan¹. Initial Atomization Mechanism and Dynamic Characteristics of Liquid with Forced Perturbation[J]. Journal of Propulsion Technology, 2020, 41(2): 353-361.

参考文献

[1] Shinjo J , Umemura A . Simulation of Liquid Jet Primary Breakup: Dynamics of Ligament and Droplet Formation[J]. International Journal of Multiphase Flow， 2010， 36( 7): 513- 532.
[2] Linne M A ， Megan P ， Gord J R ， al et . Ballistic Imaging of the Liquid Core for a Steady Jet in Crossflow[J]. Applied Optics， 2005， 44( 31): 6627- 6634.
[3] Wang Y ， Liu X ， Im K S ， et al . Ultrafast X-Ray Study of Dense-Liquid-Jet Flow Dynamics Using Structure-Tracking Velocimetry[J]. Nature Physics， 2008， 4( 4): 305- 309.
[4] Blaisot J B ， Yon J . Droplet Size and Morphology Characterization for Dense Sprays by Image Processing: Application to the Diesel Spray[J]. Experiments in Fluids， 2005， 39( 6): 977- 994.
[5] Hoover D V ， Ryan H M ， Pal S ， et al . Pressure Oscillation Effects on Jet Breakup[R]. AIAA 2012- 0259.
[6] 韩雅芳，戴圣龙，杨守杰，等 . 均匀液滴喷射沉积模拟研究[J]. 航空制造技术， 2003, ( 7): 25- 27.
[7] Carpentier J B ， Baillot F ， Blaisot J B ， al et . Behavior of Cylindrical Liquid Jets Evolving in a Transverse Acoustic Field[J]. Physics of Fluids， 2009， 21( 2): 247- 276.
[8] Yu P ， Suga K . A Numerical Study on the Breakup Process of Laminar Jets into a Gas[J]. Physics of Fluids， 2006， 18( 5).
[9] Ménard T ， Tanguy S ， Berlemont A . Coupling Level Set/VOF/Ghost Fluid Methods: Validation and Application to 3D Simulation of the Primary Break-Up of a Liquid Jet[J]. International Journal of Multiphase Flow， 2007， 33( 5): 510- 524.
[10] Herrmann M . A Balanced Force Refined Level Set Grid Method for Two-Phase Flows on Unstructured Flow Solver Grids[J]. Journal of Computational Physics， 2008， 227( 4): 2674- 2706.
[11] Herrmann M . Detailed Numerical Simulations of the Primary Atomization of a Turbulent Liquid Jet in Crossflow[J]. Journal of Engineering for Gas Turbines and Power， 2010， 132( 6).
[12] Herrmann M . The Influence of Density Ratio on the Primary Atomization of a Turbulent Liquid Jet in Crossflow[J]. Proceedings of the Combustion Institute， 2011， 33: 2079- 2088.
[13] Fuster D ， Bagué A ， Boeck T ， et al . Simulation of Primary Atomization with an Octree Adaptive Mesh Refinement and VOF Method[J]. International Journal of Multiphase Flow， 2009， 35( 6): 550- 565.
[14] Gonzalez-Flesca M ， Schmitt T ， Ducruix S ， et al . Large Eddy Simulations of a Transcritical Round Jet Submitted to Transverse Acoustic Modulation[J]. Physics of Fluids， 2016， 28( 5): 163- 178.
[15] Heister S D ， Rutz M W ， Hilbing J H . Effect of Acoustic Perturbations on Liquid Jet Atomization[J]. Journal of Propulsion & Power， 1997， 13( 1): 82- 88.
[16] 邹建锋，黄钰期，应新亚，等 . VOF方法计算密度异重流[C]. 珠海：第十六届全国水动力学研讨会， 2002.
[17] 王凯，杨国华，李鹏飞，等 . 基于Gerris的离心式喷嘴锥形液膜破碎过程数值模拟[J]. 推进技术， 2018， 39( 5): 1041- 1050.
[18] Ashgriz N ， Yarin A L ， Yarin A L ， al et . Handbook of Atomization and Sprays[M]. USA: Springer， 2011.
[19] 李霄月，邹建锋，张阳，等 . 液体射流首次破碎的直接数值模拟及动力学过程分析[J]. 推进技术， 2018, 39( 7): 1529- 1539.
[20] Yarin A L . Drop Impact Dynamics: Splashing， Spreading， Receding， Bouncing…[J]. Annual Review of Fluid Mechanics， 2006， 38( 1): 159- 192.
[21] Yang X ， Turan A . Simulation of Liquid Jet Atomization Coupled with Forced Perturbation[J]. Physics of Fluids， 2017， 29( 2).

流向强迫作用下的液体初始雾化机制及动力学特征

Initial Atomization Mechanism and Dynamic Characteristics of Liquid with Forced Perturbation

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