CAJ | 학술논문

液膜流动现象广泛存在于自然界中,作为一种高效传热传质技术,其在化工等领域有着广泛的应用.近几年来,国内外学者越来越热衷于运用数值模拟技术来研究液膜的流动特性及传热传质特性.本文归纳分析了数值模拟研究中液膜自由液面的追踪方法.总结了不同壁面结构、不同壁面倾角、液体物性、液相流量与气相流速 4 个方面对液膜的流动特性的影响规律,以及改变壁面倾角、入口雷诺数、入口添加扰动时表面波呈现的波动特性.此外,还论述了流动液膜的传热传质特性的研究现状.所得结论对流动液膜的数值模拟研究具有一定的参考价值,最后提出了用数值模拟方法研究液膜流动的缺陷与不足,展望了更加科学合理地研究流动液膜的方法.
액막류동현상엄범존재우자연계중,작위일충고효전열전질기술,기재화공등영역유착엄범적응용.근궤년래,국내외학자월래월열충우운용수치모의기술래연구액막적류동특성급전열전질특성.본문귀납분석료수치모의연구중액막자유액면적추종방법.총결료불동벽면결구、불동벽면경각、액체물성、액상류량여기상류속 4 개방면대액막적류동특성적영향규률,이급개변벽면경각、입구뢰낙수、입구첨가우동시표면파정현적파동특성.차외,환논술료류동액막적전열전질특성적연구현상.소득결론대류동액막적수치모의연구구유일정적삼고개치,최후제출료용수치모의방법연구액막류동적결함여불족,전망료경가과학합리지연구류동액막적방법.
As an efficient heat and mass transfer technology,liquid film flow has been extensively used in chemical engineering and many other industries. In recent years,numerical simulation methods were widely applied in the study of the properties of the liquid film flow and heat transfer characteristics. This paper analyzed the liquid film free surface tracking methods of numerical simulation. Four aspects,including different wall structure,different wall angle,liquid property,liquid flow rate and gas velocity were summarized. The features of fluctuations were investigated through changing the wall angle,the inlet Reynolds number and inlet disturbance. In addition,the research status of heat and mass transfer characteristics were summarized. The disadvantages of using numerical simulation method to study liquid film flow were also discussed. The more scientific and reasonable methods of researching the liquid film flow were prospected.