基于Gerris的离心式喷嘴锥形液膜破碎过程数值模拟

推进技术 ›› 2018, Vol. 39 ›› Issue (5): 1041-1050.

基于Gerris的离心式喷嘴锥形液膜破碎过程数值模拟

王凯¹,杨国华²,李鹏飞¹,张民庆³,周立新¹

西安航天动力研究所液体火箭发动机技术重点实验室，陕西西安 710100,西北工业大学航天学院，陕西西安 710072,西安航天动力研究所液体火箭发动机技术重点实验室，陕西西安 710100,航天推进技术研究院，陕西西安 710100,西安航天动力研究所液体火箭发动机技术重点实验室，陕西西安 710100

发布日期:2021-08-15
作者简介:王凯，男，博士生，研究领域为液体火箭发动机喷雾燃烧。

Numerical Simulation on Conical Liquid Sheet Breakup Process of Pressure Swirl Injector Based on Gerris

Science and Technology on Liquid Rocket Engine Laboratory，Xi’an Aerospace Propulsion Institute，Xi’an 710100，China,College of Astronautics，Northwestern Polytechnical University，Xi’an 710072，China,Science and Technology on Liquid Rocket Engine Laboratory，Xi’an Aerospace Propulsion Institute，Xi’an 710100，China,China Academy of Aerospace Liquid Propulsion Technology，Xi’an 710100，China and Science and Technology on Liquid Rocket Engine Laboratory，Xi’an Aerospace Propulsion Institute，Xi’an 710100，China

Published:2021-08-15

摘要/Abstract

摘要： 为了实现离心式喷嘴锥形液膜破碎过程的精细可视化和雾化特性的准确计算，基于自适应网格加密技术和VOF方法，建立了一种数值方法，可以捕捉到包含一次雾化和二次雾化的喷雾场结构特征，获得了全场液滴的空间分布和粒径分布，液滴捕捉效果逼真。针对给定结构尺寸的敞口型离心式喷嘴，计算了在不同流量和不同切向孔直径下的液膜锥角、液滴平均粒径SMD的变化，并与高速摄影拍摄的锥形液膜破碎过程图像和PDPA(Phase Doppler Particle Analyzer)测量的液滴SMD对比。结果表明，数值模拟与实验所获得的喷雾场吻合，获得的液膜锥角和液滴平均粒径最大相对误差分别为4.18%和11.82%，结果吻合较好，验证了数值方法的准确性，为离心式喷嘴的精细研究和设计应用提供一种新手段。研究表明，切向孔直径对液膜锥角和液滴平均粒径的影响较显著，在设计加工时，是一个比较重要的结构参数。

关键词: 离心式喷嘴；锥形液膜；破碎过程；雾化特性

Abstract: In order to realize the refined visualization of liquid sheet spray process and the accurate numerical calculation of spray characteristics， the numerical method based on adaptive mesh refinement technique and VOF method was established for pressure swirl injector. The method was able to capture the structure characteristics of the spray field， including the first spray and the second spray. And the spatial distribution and diameter distribution of droplets in the field could be obtained. The visual effect of droplets captured was almost lifelike. For the open-end swirl injector of given structure size， the spray characteristics， such as cone angle of liquid film and droplets average diameter SMD， have been calculated under the different flows and the different diameters of tangential orifices， and were compared with the breakup process images of conical liquid sheet photographed with high-speed photography and the droplets SMD measured by PDPA (phase doppler particle analyzer) system. The results are in good agreement between simulation and experiment， and the maximum relative errors of cone angle of liquid film and droplets SMD are respectively 4.18% and 11.82%， which shows that the numerical method is relatively accurate and provides a new method for the refined research and design of pressure swirl injector. In addition， the research also shows that the diameter of tangential orifice has a relatively significant impact on the cone angle of liquid film and droplets SMD. So the diameter of tangential orifice plays a more important role in the structure design and manufacturing.

Key words: Pressure swirl injector；Conical liquid sheet；Breakup process；Spray characteristics

王凯,杨国华,李鹏飞,张民庆,周立新. 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.

WANG Kai¹,YANG Guo-hua²,LI Peng-fei¹,ZHANG Min-qing³,ZHOU Li-xin¹. Numerical Simulation on Conical Liquid Sheet Breakup Process of Pressure Swirl Injector Based on Gerris[J]. Journal of Propulsion Technology, 2018, 39(5): 1041-1050.

参考文献

[1] 王成军, 陈海耿, 张宝诚. 双路离心式喷嘴的实验与数值模拟[J]. 工程热物理学报, 2010, 31(10): 1797-1799.
[2] 杨立军, 张向阳, 葛明和. 敞口型离心喷嘴动力学特性理论分析 [J]. 推进技术, 2006, 27(6): 497-500. (YANG Li-jun, ZHANG Xiang-yang, GE Ming-he. Theoretical Analysis of Dynamics of Open Swirl Injector[J]. Journal of Propulsion Technology, 2006, 27(6):497-500.)
[3] York J L, Stubbs H F, Tek M R. The Mechanism of Disintegration of Liquid Sheets[J]. Transactions of ASME, 1953, 75: 1279-1286.
[4] 岳明, 徐茂林. 锥形液膜空间稳定性分析[J]. 航空动力学报, 2003, 18(6): 794-798.
[5] Youngbin Yoon, In-Seuk Jeung. Effects of Ambient Gas Pressure on the Breakup of Sprays in Like-Doublet and Swirl Coaxial Injectors[C]. Istanbul: International Symposium on Energy Conversion Fundamentals, 2004.
[6] Paul W Loustalan, Martin H Davy, Paul A Williams. Experimental Investigation into the Liquid Sheet Break-Up of High-Pressure DISI Swirl Atomizers [C]. Warrendale: SAE International, 2003.
[7] 刘娟, 李清廉, 刘卫东, 等. 离心式喷嘴液膜破碎过程实验 [J]. 推进技术, 2011, 32(4): 539-543. (LIU Juan, LI Qing-lian, LIU Wei-dong, et al. Experiment on Liquid Sheet Breakup Process of Pressure Swirl Injector[J]. Journal of Propulsion Technology, 2011, 32(4): 539-543.)
[8] Yue Ming, Xu Hang, Yang Maolin, et al. Study on Breakup of Conical Liquid Sheet under Varying Flow Conditions[J]. Chinese Journal of Aeronautics, 2003, 16(1): 12-14.
[9] 张新桥, 沈赤兵, 李清廉, 等. 切向孔单/双排布局对离心式喷嘴锥形液膜雾化特性影响 [J]. 推进技术, 2016, 37(11): 2142-2149. (ZHANG Xin-qiao, SHEN Chi-bing, LI Qing-lian, et al. Effects of Single-Row/Dual-Row Layout of Tangential Holes on Atomization Characteristics of Conical Sheets Emanating from Swirl Atomizer[J]. Journal of Propulsion Technology, 2011, 32(4): 539-543.)
[10] 徐让书, 年帅奇, 牛玲, 等. 离心式喷嘴内部流动与液膜初级破碎的耦合模拟[J]. 沈阳工业大学学报, 2011, 33(6): 661-666.
[11] 刘娟. 旋转锥形液膜破碎过程实验与仿真研究 [D]. 长沙:国防科学技术大学, 2012.
[12] Olivier Desjardins, Jeremy O McCaslin, Mark Owkes, et al. Direct Numerical and Large-Eddy Simulation of Primary Atomization in Complex Geometries[J]. Atomization and Sprays, 2013, 23 (11): 1001-1048.
[13] Daniel Fuster, Anne Bagué, Stéphane Popinet, 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] 阎超, 于剑, 徐晶磊, 等. CFD模拟方法的发展成就与展望 [J]. 力学进展, 2011, 41(5): 562-589.
[15] Mehravaran K. Direct Simulation of Primary Atomization in Moderate-Speed Diesel Fuel Injection[J]. International Journal of Materials, Mechanics and Manufacturing, 2013, 1(2): 207-209.
[16] Stéphane Popinet. An Accurate Adaptive Solver for Surface-Tension-Driven Interfacial Flows[J]. Journal of Computational Physics, 2009, 228(16): 5838-5866.
[17] Shahriar Afkhami, Yuriko Renardy. A Volume-of-Fluid Formulation for the Study of Co-Flowing Fluids Governed by the Hele-Shaw Equations[J]. Physics of Fluids, 2013, 25(8): 0820011-0820019.
[18] 陈晓东, 刘宇, 杨威迦. 背压对液体离心式喷嘴内液膜厚度的影响 [J]. 航空动力学报, 2010, 25(1):198-202.
[19] 王凯, 杨国华, 李鹏飞, 等. 离心式喷嘴内部流动过程数值仿真分析[J]. 火箭推进, 2016, 42(4): 14-20.
[20] Rizk N K, Lefebvre A H.Internal Flow Characteristics of Simplex Swirl Atomizers[J]. Journal of Propulsion and Power, 1985, 1(3): 193-199.
[21] Rizk N K, Lefebvre A H. Spray Characteristics of Simplex Swirl Atomizers[J]. Progress in Astronautics and Aeronautics, 1984, 95: 563-580.
[22] Benjamin M A. Film Thickness, Droplet Size Measurements and Correlations for Large Pressure-Swirl Atomizers[C]. Stockholm: International Gas Turbine and Aeroengine Congress and Exhibition American Society of Mechanical Engineer, 1998.
[23] Jasuja A K. Atomization of Crude and Residual Fuel Oils[J]. Journal of Engineering for Gas Turbiners & Power,1979, 101(2): 250-258.
[24] Jones A R. Design Optimization of a Large Pressure-Jet Atomizer for Power Plant[C]. Madison:Proceedings of the 2nd International Conference on Liquid Atomization and Spray Systems, 1982.(编辑:史亚红)　　　　　　　　　　　　　*　收稿日期:2017-03-22；修订日期:2017-06-12。作者简介:王凯,男,博士生,研究领域为液体火箭发动机喷雾燃烧。E-mail:1075832794@qq.com