加热条件下粘性液膜射流破碎机理的研究  

Study on Breakup Mechanism of Viscous Liquid Sheets Under Heating Condition

作　　者：张平[1] 杜青[1] 丁宁[1] 郗大光[2] 杨延相[2] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072 [2]天津内燃机研究所,天津300072

出　　处：《燃烧科学与技术》2003年第4期353-359,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(59906008).

摘　　要：利用线性不稳定性理论,对具有温度梯度的粘性液膜射流模型所对应的色散方程进行了数值求解.利用计算结果,研究了加热条件下反对称模式和对称模式粘性液膜射流大、小尺度破碎模式的破碎机理,探讨了韦伯数(We)、密度比(Q)、Marangoni数(Ma)和Ohnesorge数(z)对液膜射流表面波的最大扰动增长率及占优波数的影响.Based on linear instability theory, the dispersion equation of a moving liquid sheet with viscosity and temperature gradient was solved by digital calculation. Using the calculated results, the breakup mechanism of liquid sheets under sinuous mode and varicose mode in large scale and small scale breakup regimes was studied. Effects of dimensionless numbers, including Weber number (We), density ratio (Q), Marangoni number (Ma) and Ohnesorge number (z) on the growth rate and dominant frequency of surface wave on liquid sheets were investigated.

关 键 词：液膜 不稳定性 破碎 反对称模式 对称模式 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]