Publicado 12 números por año
ISSN Imprimir: 1044-5110
ISSN En Línea: 1936-2684
Indexed in
BREAKUP OF LIQUID JETS EMANATING FROM ELLIPTICAL ORIFICES AT LOW FLOW CONDITIONS
SINOPSIS
This article presents experimental results on the breakup behavior of liquid jets emanating from elliptical orifices with different orifice aspect ratios. The experiments were carried out in the range of mean jet velocity 0−5 m/s, using water as the working fluid; the liquid jets were injected vertically downward in still, ambient air. Photographic methods were employed to analyze the breakup characteristics of the liquid jets. The breakup curves of the elliptical orifice jets are compared with those of circular orifices with the same exit area as the elliptical orifices. The comparison shows that the liquid jets emanating from the elliptical orifice are less stable than jets from the circular orifice in a particular range of flow conditions corresponding to a √We range of 2−20. We attribute this enhanced instability of the elliptical jet to the axis-switching process occurring in this √We regime, a phenomenon by which the elliptical jet interchanges major and minor axes periodically as the jet flows downstream. The breakup process of the elliptical jet resembles that of the circular jet below this range of flow conditions, and their breakup curves coincide. Above this range, the elliptical liquid jets exhibit different flow behavior from the circular jet, although their breakup curves coincide again.
-
Kasyap T.V., Sivakumar D., Raghunandan B.N., Flow and breakup characteristics of elliptical liquid jets, International Journal of Multiphase Flow, 35, 1, 2009. Crossref
-
Sharma Priyesh, Fang Tiegang, Breakup of liquid jets from non-circular orifices, Experiments in Fluids, 55, 2, 2014. Crossref
-
Lin Chin-Tien, Kuo Jenn-Kun, Yen Tzu-Hsiang, Three-dimensional molecular dynamics study of aperture shape effect on nanojet ejection, Journal of the Chinese Institute of Engineers, 34, 8, 2011. Crossref
-
Ku K.W., Hong J.G., Effect of Flow Structure Inside Nozzle on the Liquid Jet Breakup of Elliptical Nozzle, Journal of ILASS-Korea, 18, 1, 2013. Crossref
-
Wang Fujun, Fang Tiegang, Liquid jet breakup for non-circular orifices under low pressures, International Journal of Multiphase Flow, 72, 2015. Crossref
-
Song Yoonho, Hwang Donghyun, Ahn Kyubok, Effect of orifice geometry on spray characteristics of liquid jet in cross flow, 55th AIAA Aerospace Sciences Meeting, 2017. Crossref
-
Yu Shenghao, Yin Bifeng, Deng Weixin, Jia Hekun, Ye Ze, Xu Bin, Xu Huaping, Internal flow and spray characteristics for elliptical orifice with large aspect ratio under typical diesel engine operation conditions, Fuel, 228, 2018. Crossref
-
Zhao Fei, Qin Li-Zi, Fu Qing-Fei, Mo Chao-Jie, Yang Li-Jun, Spray Characteristics of Elliptical Power-Law Fluid-Impinging Jets, Journal of Fluids Engineering, 139, 7, 2017. Crossref
-
Jaberi A., Tadjfar M., Wavelength and frequency of axis-switching phenomenon formed over rectangular and elliptical liquid jets, International Journal of Multiphase Flow, 119, 2019. Crossref
-
Song Yoonho, Hwang Donghyun, Ahn Kyubok, Effect of Orifice Geometry on Column Trajectories of Liquid Jets in Crossflows, International Journal of Aeronautical and Space Sciences, 20, 1, 2019. Crossref
-
Chiatti Giancarlo, Chiavola Ornella, Palmieri Fulvio, Pompei Roberto, On the Influence of the Slot Orifice in Diesel Common Rail Nozzle, The Open Fuels & Energy Science Journal, 11, 1, 2018. Crossref
-
Zhao Fei, Yang Li-jun, Mo Chao-jie, Li Xue-de, Characteristics of Sheet Formed by Collision of Two Elliptical Jets at Short Impact Distance, Journal of Fluids Engineering, 138, 5, 2016. Crossref
-
Yin Bifeng, Xu Bin, Jia Hekun, Yu Shenghao, The Effect of Elliptical Diesel Nozzles on Spray Liquid-Phase Penetration under Evaporative Conditions, Energies, 13, 9, 2020. Crossref
-
Jaberi Amin, Tadjfar Mehran, Comparative study on interfacial oscillations of rectangular and elliptical liquid jets, Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 234, 7, 2020. Crossref
-
Aliyoldashi MH, Tadjfar M, Jaberi A, Entrance length effects on the flow features of rectangular liquid jets, Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 235, 10, 2021. Crossref
-
Biswas Gautam, Sahu Kirti Chandra, Recent Advances in Free Surface Flows, in Mechanical Sciences, 2021. Crossref
-
Zhang Mengsen, Zhu Jianqin, Tao Zhi, Qiu Lu, Breakup of rectangular liquid jets with controlled upstream disturbances, International Journal of Multiphase Flow, 139, 2021. Crossref
-
Zheng Hong-Xiang, Luo Yun, Zhang Bao-Zhu, Jiang Wen-Chun, Tu Shan-Tung, A new calculation formula to describe the dynamic pressure of water jet peening with elliptical nozzle for high-efficiency treatment, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 236, 10, 2022. Crossref
-
Jordan Daniel T. A., Ribe Neil M., Deblais Antoine, Bonn Daniel, Chain oscillations in liquid jets, Physical Review Fluids, 7, 10, 2022. Crossref