Abstract:Based on the linear instability theory, the perturbed pressure and electric fields were analyzed and the dispersion equation of charged viscid liquid jet was established by force characteristics analysis. Through numerical computations, the influence of jet velocity, charged voltage and viscosity on the instability of charged jet were obtained. The results show that with increasing jet velocity and charged voltage, the maximum of wave growth rate, corresponding optimal wave number, and the maximum of wave number get larger, and the droplet size gets smaller. Viscosity always makes the jet more stable. When viscosity is higher, the maximum of wave growth rate and corresponding optimal wave number get smaller so that the droplet size is bigger, but the maximum of wave number remains unchanged. For the jet with a velocity in the range of 0 to 1 m/s, the 0order wave always exists regardless whether the jet is charged or not. The 1order wave appears on the surface of uncharged liquid jet only when the jet velocity reaches a certain value and high voltage makes the 1order wave occur in a lower jet velocity. The 0order wave is dominant in jet breakup because the maximum growth rate of 0order wave is larger than that of 1order wave.
王晓英, 王军锋. 荷电黏性液体射流线性不稳定性分析[J]. 排灌机械工程学报, 2012, 30(2): 225-230.
WANG Xiao-Ying, WANG Jun-Feng. Linear stability analysis for charged viscid liquid jets. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(2): 225-230.
参考文献(References)[1]王贞涛,闻建龙,王晓英,等.高压静电液体雾化技术[J].高电压技术,2008,34(5):1067-1072.Wang Zhentao,Wen Jianlong,Wang Xiaoying,et al.High voltage electrostatic spray[J].High Voltage Engineering,2008,34(5):1067-1072.(in Chinese)[2]万云霞,黄勇,朱英.液体圆柱射流破碎过程的实验[J].航空动力学报,2008,23(2):208-214.Wan Yunxia,Huang Yong,Zhu Ying.Experiment on the breakup process of free round liquid jet[J].Journal of Aerospace Power,2008,23(2):208-214.(in Chinese)[3]Cheong B S,Howes T.Capillary jet instability under the influence of gravity[J].Chemical Engineering Science,2004,59(11):2145-2157.[4]Cervone A,Manservisi S,Scardovelli R.Simulation of axisymmetric jets with a finite element Navier-Stokes solver and a multilevel VOF approach[J].Journal of Computational Physics,2010,229(19):6853-6873.[5]Cheong B S,Howes T.Effect of initial disturbance amplitude in gravity affected jet breakup[J].Chemical Engineering Science,2005,60(13):3715-3719.[6]Li Fang,Yin Xieyuan,Yin Xiezhen.Temporal linear instability analysis of an electrified coaxial jet with inner driving liquid inside a coaxial electrode[J].Journal of Electrostatics,2006,64(10):690-698.[7]汪朝晖,廖振方.针板电极荷电液体射流不稳定性分析[J].农业机械学报,2009,40(8):86-91.Wang Zhaohui,Liao Zhenfang.Analysis of instability for charged liquid jets with the needleplate electrode[J].Transactions of the Chinese Society for Agricultural Machinery,2009,40(8):86-91.(in Chinese)[8]Abd Elmonem Khalil Elcoot.Weakly nonlinear EHD stability of slightly viscous jet[J].European Journal of MechanicsB/Fluids,2009,28(1):127-135.[9]张军,闻建龙,王军锋,等.不同雾化模式下静电雾化的雾滴特性[J].江苏大学学报:自然科学版,2006,27(2):105-108.Zhang Jun,Wen Jianlong,Wang Junfeng,et al.Droplets characteristics of electrostatic spraying at different modes of spraying[J].Journal of Jiangsu University: Natural Science Edition,2006,27(2):105-108.(in Chinese)[10]Zhang R J,Liu Y,Yang T T,et al.A numerical study of viscosity ratio on instability of electrically driven jets[J].Mechanics Research Communications,2009,36(4):537-545.
没有找到本文相关文献
江苏大学梦溪校区(镇江市梦溪园巷30号)图书馆5楼 0511-84440893
传真0511--84440033 Copyright 江苏大学杂志社 2010-2015 All
Rights Reserved