Browse > Article
http://dx.doi.org/10.5916/jkosme.2014.38.10.1257

Spray characteristics of misaligned impinging injectors  

Subedi, Bimal (Graduate School of Aerospace and Mechanical Engineering)
Son, Min (Graduate School of Aerospace and Mechanical Engineering)
Kim, Woojin (Department of Aircraft Maintenance, Chodang University)
Choi, Jangsu (INNOVIS Co. Ltd.)
Koo, Jaye (School of Aerospace and Mechanical Engineering, Korea Aerospace University)
Abstract
The variances of atomization characteristics with the misalignment of injectors defined as the fraction of skewness for various angles of impingement and pressure conditions were studied using the doublet impinging injectors with a like-on-like arrangement. Water was used as simulant and the spray characteristics along with the changes in the skewness were analyzed using the methods of spray image photography. Experiment was carried for the impinging nozzles of orifice diameter of 1.2 mm within Reynolds numbers ranging from $9{\times}10^3-4.5{\times}10^4$ and the fraction of skewness considered for the experiment ranges from 0.0 to 0.9 at ambient temperature condition. Flat sheet with a distinct rim produced perpendicular to the plane of impinging jets goes ondisappear and sheet appears comparatively shorterwith the increase in fraction of skewness resulting the atomization of fluid droplet very close to impingement point with decrease in breakup length and increase in spray angle up to certain extent. The maximum allowable skewness was found as the result. The skewness up to the certain extent can be considered as the parameter to control the atomization characteristics of simulant inside the combustion chamberproviding the high economic performance of fuel and time.
Keywords
Fraction of Skewness; Atomization; Impinging Injectors; Spray Characteristics;
Citations & Related Records
연도 인용수 순위
  • Reference
1 W. E Anderson, H. M. Ryan, S. Pal, and R. J. Santoro, "Fundamental Studies of Impinging Liquid Jets," Proceedings of the 30th Aerospace Sciences Meeting (AIAA-1992-0458), 1992.
2 H. M. Ryan, W. E. Anderson, S. Pal, and R. J. Santoro, "Atomization characteristics of impinging liquid jets," Journal of Propulsion and Power, vol. 11, no. 1, pp 135-144, 1995.   DOI   ScienceOn
3 K. Jung, Y. Yoon, and S. S. Hwang, "Spray Characteristics of Impinging Jet InjectorsUsing Imaging Techniques," Proceedings of the 36th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit (AIAA-2000-3396), 2000.
4 M. F.Heidmann, R. J.Priem, and J. C. Humphrey, A Study of Sprays Formed by Two Impinging Jets, NASA TN 3835, 1957.
5 H. P. Gadgil and B.N. Raghunandan, "Effect of skewness on the characteristics of impinging jet atomizers," Atomization and Sprays, vol. 19, no. 1, pp.1-18, 2009.   DOI
6 G. Bailardi, M. Negri, and H. K. Ciezki, "Several aspects of the atomization behavior of various Newtonian fluids with a likeon-like impinging jet injector." Proceedings of the 23rd European Conference on Liquid Atomization and Spray Systems, 2010.