An experimental investigation of liquid jets under low-speed crossflows

Year 2024, Volume: 10 Issue: 6, 1411 - 1422, 19.11.2024

Hatice Mercan , Mehdi Nabati Hasan Bedir , Günay Anlaş

Abstract

This study presents the breakup mechanisms and droplet features of a liquid jet introduced into a low-speed cross air flow. The main aim of this study is to investigate the spray behavior of water when exposed to a uniform crossflow of air at very low velocities. A shadow sizing system is employed to collect comprehensive data for analyzing the interactions between liquid jets and crossflowing air. Three different nozzles were used to examine the distribution, penetration, and breakup characteristics of water jets in an air crossflow. It is worth high-lighting that the Weber number in this experiment was maintained at a very low level. Both the jet Weber number (1.3 < Wej < 119) and the gas Weber number (0 < Weg < 1), along with the momentum flux ratio (2 < q < 14400), are crucial dimensionless parameters significantly affecting various droplet properties such as size, velocity, shape, and breakup behavior. This study investigates the structural features, trajectory of the jet, and duration of breakup near the nozzle. Subsequently, the experimental results are tabulated for future numerical and analytical studies. As the air crossflow velocity increases, the liquid jet bends in the direction of the airflow. The breakup length decreases with increasing air velocity. The nozzle with medium diameter shows the maximum dimensionless breakup length. At a constant air velocity, the breakup length initially increases and then decreases with an increasing momentum flux ratio. Higher liquid flow rates result in a higher density of smaller droplets. The liquid jets shift upstream with increasing q values; however, due to the wide range of q values, existing empirical relations in the literature fail to accurately predict this behavior.

Keywords

Droplet Formation, Gaseous Crossflow, Liquid Jet, Momentum Flux Ratio, Shadow Graph, Spray Penetration, Weber Number

References

• [1] Birouk M, Stäbler T, Azzopardi BJ. An experimental study of liquid jets interacting with cross airflows. Part Part Syst Charact 2003;20:3946. [CrossRef]
• [2] Karagozian AR. Transverse jets and their control. Prog Energy Combustion Sci 2010;36:531553. [CrossRef]
• [3] Desantes JM, Arrègle J, López JJ, García JM. Turbulent gas jets and diesel-like sprays in a crossflow: A study on axis deflection and air entrainment. Fuel 2006;85:21202132. [CrossRef]
• [4] Broumand M, Birouk M. Liquid jet in a subsonic gaseous crossflow: Recent progress and remaining challenges. Prog Energy Combustion Sci 2016;57:129. [CrossRef]
• [5] Kasmaiee S, Tadjfar M. Influence of injection angle on liquid jet in crossflow. Int J Multiphase Flow 2022;153:104128. [CrossRef]
• [6] Pai M, Bermejo-Moreno I, Desjardins O, Pitsch H. Parametric study of primary breakup of turbulent liquid jets in crossflow: Role of Weber number. 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Orlando, Florida; 4-7 Jan 2010. p. 212. [CrossRef]
• [7] Prakash SR, Jain SS, Lovett JA, Raghunandan BN, Ravikrishna RV, Tomar G. Detailed numerical simulations of atomization of a liquid jet in a swirling gas crossflow. Atom Sprays, 2019;29:577603. [CrossRef]
• [8] Mukundan AA, Tretola G, Ménard T, Herrmann M, Navarro-Martinez S, Vogiatzaki K, et al. DNS and LES of primary atomization of turbulent liquid jet injection into a gaseous crossflow environment. Proc Combust Inst 2021;38:32333241. [CrossRef]
• [9] Wu PK, Kirkendall KA, Fuller RP, Gruber MR, Nejad AS. Spray trajectories of liquid fuel jets in subsonic crossflows. Int J Fluid Mech Res 1997;24:128137. [CrossRef]
• [10] Tambe S, Jeng SM, Mongia H, Hsiao G. Liquid jets in subsonic crossflow. 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada; 11 Jan 2005. p. 731. [CrossRef]
• [11] Yoo YL, Han DH, Hong JS, Sung HG. A large eddy simulation of the breakup and atomization of a liquid jet into a cross turbulent flow at various spray conditions. Int J Heat Mass Transf 2017;112:97112. [CrossRef]
• [12] Schetz JA, Kush EA Jr, Joshi PB. Wave phenomena in liquid jet breakup in a supersonic crossflow. AIAA 1980;18:774778. [CrossRef]
• [13] Wu L, Wang ZG, Li Q, Zhang J. Investigations on the droplet distributions in the atomization of kerosene jets in supersonic crossflows. Appl Physics Letters 2015;107:104103. [CrossRef]
• [14] Singh V, Joseph NC, Thakor N, Chaudhuri S. Liquid Jet Interaction with Supersonic Crossflow. AIAA Scitech 2020 Forum, Orlando, FL; 6-10 Jan 2020. p. 1613. [CrossRef]
• [15] Catton I, Hill DE, McRae RP. Study of liquid jet penetration in a hypersonic stream. AIAA 1968;6:20842089. [CrossRef]
• [16] Perurena JB, Asma CO, Theunissen R, Chazot O. (). Experimental investigation of liquid jet injection into Mach 6 hypersonic crossflow. Experiments Fluids 2009;46:403417. [CrossRef]
• [17] Stenzler JN, Lee JG, Santavicca DA, Lee W. Penetration of liquid jets in a cross-flow. Atom Sprays 2006;16:887906. [CrossRef]
• [18] Kong L, Lan T, Chen J, Wang K, Sun H. Breakup processes and droplet characteristics of liquid jets injected into low-speed air crossflow. Processes 2020;8:676. [CrossRef]
• [19] Mazallon J, Dai Z, Faeth GM. Primary breakup of nonturbulent round liquid jets in gas crossflows. Atom Sprays 1999;9:291311. [CrossRef]
• [20] Madabhushi RK, Leong MY, Arienti M, Brown CT, McDonell VG. On the breakup regime map of liquid jet in crossflow. ILASS Americas, 19th Annual Conference on Liquid Atomization and Spray Systems, Toronto, Canada; 2006.
• [21] Vich G, Ledoux M. Investigation of a liquid jet in a subsonic cross-flow. Int J Fluid Mech Res 1997;24:112. [CrossRef]
• [22] Scharfman B, Techet A, Bush J. Hydrodynamic instabilities in round liquid jets in gaseous crossflow. APS Div Fluid Dynamics Meet Abst 2011;64:R25005.
• [23] Kitamura Y, Takahashi T. Stability of a liquid jet in air flow normal to the jet axis. J Chem Engineer Japan 1976;9:282286. [CrossRef]
• [24] Peters J, Birouk M. Liquid jet breakup in a subsonic cross airflow: An experimental study of the effect of the gas phase turbulence. Exp Comput Multiphase Flow 2024;6:4158. [CrossRef]
• [25] Olyaei G, Kebriaee A. Experimental study of liquid jets injected in crossflow. Exp Therm Fluid Sci 2020;115:110049. [CrossRef]
• [26] Prakash RS, Sinha A, Tomar G, Ravikrishna RV. Liquid jet in crossflow–effect of liquid entry conditions. Exp Therm Fluid Sci 2018;93:4556. [CrossRef]
• [27] Zhang T, Song X, Kai X, He Y, Li R. Numerical simulation on primary breakup characteristics of liquid jet in oscillation crossflow. Aerospace 2023;10:991. [CrossRef]
• [28] Manshadi MD. A new approach for turbulence reduction in a subsonic wind tunnel. PhD Thesis; Tehran, Iran: Sharif University of Technology; 2009.
• [29] Manshadi MD. The importance of turbulence reduction in assessment of wind tunnel flow quality. In: Lerner JC, Boldes U, eds. Wind Tunnels and Experimental Fluid Dynamics Research. InTech; 2011.
• [30] Lubarsky E, Reichel JR, Zinn BT. McAmis R. Spray in crossflow: Dependence on Weber number. J Engineer Gas Turbines Power 2009;132:021501. [CrossRef]