Ming Jia   

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Language:English

Book Publications

Title of Paper:液滴在连续气流作用下的变形与破碎

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Date of Publication:2018-01-01

Journal:内燃机学报

Included Journals:CSCD

Volume:36

Issue:3

Page Number:230-236

ISSN No.:1000-0909

Key Words:液滴破碎; 临界We数; 预测模型; 液滴对

Abstract:基于OpenFOAM,采用简化耦合的多相流模型(S-CLSVOF)对液滴破碎进行了数值模拟研究.自适应网格加密(AMR)技术的应用提高了界面捕捉
   能力,同时减低了计算成本.基于该数值方法,首先考察了We数对液滴拽力系数和破碎形态的影响.结果表明:We数并不影响变形初期的拽力系数;随着We数
   增加,破碎液滴依次呈现帽状、帽状/液网及帽状/液丝结构.其次,研究了宽Ohnesorge数(0.001~2.000)范围内的袋式破碎临界We数,
   并基于模拟结果和Rayleigh-Taylor不稳定性,改进了袋式破碎临界We数的理论预测模型.最后,考察了液滴对相互作用下的破碎,结果表明,回
   流区的竞争/融合分别抑制/促进液滴对的变形与破碎.

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