加热条件下泰勒模式液膜射流破碎的模式特征研究  

Study on Characters of Breakup Modes of Liquid Sheets in Taylor Mode Under Heating Conditions

作　　者：杜青[1] 丁宁[1] 金中国[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5期413-418,共6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.利用所得到的结果,研究了加热条件下泰勒模式粘性液膜射流破碎的模式特征以及无量纲Weber数、密度比、Marangoni数和Ohnesorge数对不同模式特征液膜射流的最大扰动增长率、占优波数和截止波数的影响.研究结果表明,依照不同的物理条件,液膜射流的破碎会呈现出由对称模式和反对称模式共同控制或分别控制的模式特征来.Based on linear instability theory, the dispersion equation of a moving liquid sheet with viscosity and temperature gradient was solved by digital calculation. By using the calculation results, characters of breakup modes of the liquid sheet in Taylor mode were studied, and the effects of dimensionless numbers, including Weber number, density ratio, Marangoni number, and Ohnesorge number, on such parameters as perturbation growth rate, dominant wave number and cutoff wave number of different modes were also investigated. It is shown that under certain physical conditions, the breakup of liquid sheets will be controlled by sinuous mode or varicose mode respectively, or these two modes together. 

关 键 词：液膜 泰勒模式 破碎 对称模式 反对称模式 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]