|本期目录/Table of Contents|

[1]徐阳杰,虞育松,李国岫. 超临界环境下的雾化过程中表面张力变化对射流稳定性的影响[J].燃烧科学与技术,2017,(02):111-115.[doi:DOI 10.11715/rskxjs.R201604016]
 Xu Yangjie,Yu Yusong,Li Guoxiu. Effects of Change in Surface Tension on Jet Stabilitiesin Atomization Process under Supercritical Environments[J].Journal of Combustion Science and Technology,2017,(02):111-115.[doi:DOI 10.11715/rskxjs.R201604016]
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 超临界环境下的雾化过程中表面张力变化对
射流稳定性的影响
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《燃烧科学与技术》[ISSN:1006-8740/CN:12-1240/TK]

卷:
期数:
2017年02
页码:
111-115
栏目:
出版日期:
2017-04-15

文章信息/Info

Title:
 Effects of Change in Surface Tension on Jet Stabilities
in Atomization Process under Supercritical Environments
作者:
 徐阳杰虞育松李国岫
 北京交通大学机械与电子控制工程学院,北京 100044
Author(s):
 Xu YangjieYu YusongLi Guoxiu
 School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China
关键词:
 射流破碎气液界面热交换表面张力线性稳定性跨临界环境中
Keywords:
 jet breakupheat exchange on liquid-gas interfacesurface tensionlinear instabilitysupercriticalenvironments
分类号:
TK421.2
DOI:
DOI 10.11715/rskxjs.R201604016
文献标志码:
A
摘要:
 通过考虑由于气液界面上存在传热过程而导致的表面张力随空间分布的变化规律,并将此影响耦合加入
线性稳定性理论中,研究燃油射流在进入跨临界环境后的稳定性及破碎行为.结果表明,随温度的增加,表面张
力减小的梯度逐渐增大,并非线性分布;当气液界面温度接近临界点时,表面张力快速衰减为零;考虑传热效应
和表面张力变化时,最不稳定波的增长率随波的发展是变化的.分析结果将有助于理解跨临界环境下射流破碎的
机理,进一步扩展现有雾化模型在实际工况下的适用性.
Abstract:
 Linear theory model has been applied for the investigation on the instability and breakup of fuel spray in
supercritical or subcritical environment since it has considered the spatial variation of surface tension at the liquidgas
interface.The spatial variation of surface tension is obtained from the states of real-fluid thermodynamics that
is upon both surface tension and transient heat-transfer between the surrounding gas and the liquid column,via
which the classical interface breakup theory and the effects of the real fluid thermodynamic state are coupled.As
the results show,the gradient of the surface tension gets larger along with the increase of temperature in a nonlinear
distribution.When the temperature at the gas-liquid interface is close to critical point,the surface tension
rapidly reduces to zero.When the heat transfer effect and the surface tension changes are taken into
consideration,the growth rate of the dominant wave is a changing value.Such an analysis method could provide a
great help to the understanding of fuel spray breakup mechanisms under supercritical or subcritical conditions,
consequently a significant guide to the understanding of actual operation conditions in advanced diesel engines.

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备注/Memo

备注/Memo:
 收稿日期:2016-04-25.
基金项目:国家自然科学基金资助项目(51476008).
作者简介:徐阳杰(1990— ),男,博士,13116352@bjtu.edu.cn.
通讯作者:李国岫,男,博士,教授,li_guoxiu@yahoo.com.
更新日期/Last Update: