北京航空航天大学学报 ›› 2017, Vol. 43 ›› Issue (11): 2286-2292.doi: 10.13700/j.bh.1001-5965.2017.0080

• 流动特性分析 • 上一篇    下一篇

搅拌流内大振幅界面波特性研究

王科1,2, 叶晶3,4, 白博峰4   

  1. 1. 中国石油大学(北京) 机械与储运工程学院, 北京 100249;
    2. 过程流体过滤与分离技术北京市重点实验室, 北京 100249;
    3. 上海船用柴油机研究所, 上海 201108;
    4. 西安交通大学 动力工程多相流国家重点实验室, 西安 710049
  • 收稿日期:2017-02-21 修回日期:2017-07-21 出版日期:2017-11-20 发布日期:2017-09-18
  • 通讯作者: 白博峰 E-mail:bfbai@mail.xjtu.edu.cn
  • 作者简介:王科,男,博士,讲师。主要研究方向:动力工程多相流、反应堆热工水力、石油工程多相流等;叶晶,男,博士,工程师。主要研究方向:气液两相流动与传热;白博峰,男,博士,教授,博士生导师。主要研究方向:石油工程多相流、复杂液滴动力学、热交换器及热力系统能效提升等。
  • 基金资助:
    国家自然科学基金(51276140,51474229,51706245);中国石油大学(北京)科研基金(2462016YJRC029)

Study on properties of huge waves in churn flow

WANG Ke1,2, YE Jing3,4, BAI Bofeng4   

  1. 1. College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, Beijing 100249, China;
    2. Beijing Key Laboratory of Process Fluid Filtration and Separation, Beijing 100249, China;
    3. Shanghai Marine Diesel Engine Research Institute, Shanghai 201108, China;
    4. State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2017-02-21 Revised:2017-07-21 Online:2017-11-20 Published:2017-09-18
  • Supported by:
    National Natural Science Foundation of China (51276140, 51474229, 51706245); Science Foundation of China University of Petroleum-Beijing (2462016YJRC029)

摘要: 针对竖直管内不同工况下气液两相搅拌流内的大振幅界面波特征参数(波形、波幅、波长和频率等)及运动特性进行了实验研究,系统分析了流动参数对大振幅界面波特征参数及运动特性的影响规律。结果表明:由于重力和气流剪切力在大振幅界面波不同运动阶段的影响程度不同,大振幅界面波在运动过程中存在与气流先逆向后同向的运动特点,证明了液泛现象普遍存在于搅拌流内,揭示了造成搅拌流液膜振荡剧烈的原因;搅拌流内,大振幅界面波波形符合正态分布函数特征,且波幅较环状流内扰动波波幅大,但是波幅和波长变化趋势与环状流内扰动波变化趋势相似,即波幅和波长随着气速的增大而减小,随液量的增大而增大,且当气速较小时,临界波幅随着液量的增加逐渐趋于定值;而大振幅界面波平均产生频率随气速和液速的增大而增大。

关键词: 气液两相流, 搅拌流, 界面波, 波动特性, 液膜, 液泛

Abstract: The present paper focused on huge wave's feature parameters (e.g. wave shape, wave amplitude, wave length, wave frequency, etc.) and kinetic properties in gas-liquid two-phase churn flow in vertical pipe under different working conditions and conducted experimental study. The effects of flow parameters on feature parameters and kinetic properties of huge wave were investigated. The results indicate that the competition between gravity and shear force under different flow conditions affects the wave behavior significantly. The huge wave firstly moves downward due to the gravity till it reaches a critical amplitude for the flow reversal, which demonstrates that the flooding of the film is a characteristic of the churn flow throughout the regime and the reason makes churn flow highly disturbed. The shape of huge wave can be described by a normal-distribution function, and the wave amplitude of huge wave is larger than disturbance wave in annular flow. The amplitude and wavelength of huge wave decrease with the increase in gas flow rate but increase with the increasing liquid mass flow rate, which is similar to annular flow. At lower gas superficial velocities, the critical amplitude asymptotically approaches a constant value at greater liquid mass flow rates. The wave frequency is found to be proportional to the gas and liquid velocity.

Key words: gas-liquid two-phase flow, churn flow, interfacial wave, wave property, liquid film, flooding

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