Chemical Industry and Engineering Progress ›› 2020, Vol. 39 ›› Issue (4): 1282-1291.DOI: 10.16085/j.issn.1000-6613.2019-1143

• Chemical processes and equipment • Previous Articles     Next Articles

Experimental studies on primary breakup of liquid jets injected intolow-speed air crossflow

Tian LAN1,2(),Lingzhen KONG1,3(),Jiaqing CHEN1,3,Kuisheng WANG2   

  1. 1.School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
    2.College of Mechanical Electrical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
    3.Beijing Key Laboratory of Pipeline Critical Technology and Equipment for Deep Water Oil & Gas Development, Beijing 102617, China
  • Received:2019-07-17 Online:2020-04-28 Published:2020-04-05
  • Contact: Lingzhen KONG

低速横流作用下液体射流初次破碎实验

兰天1,2(),孔令真1,3(),陈家庆1,3,王奎升2   

  1. 1.北京石油化工学院机械工程学院,北京 102617
    2.北京化工大学机电工程学院,北京 100029
    3.深水油气管线关键技术与装备北京市重点实验室,北京 102617
  • 通讯作者: 孔令真
  • 作者简介:兰天(1995—),男,硕士研究生,研究方向为气液传质过程强化。E-mail:bruskylan@163.com
  • 基金资助:
    国家自然科学基金青年基金(21808015);北京市高水平创新团队建设计划(IDHT20170507)

Abstract:

The experimental setup of jet breakup and atomization was established. It was visualized to study the effects of different gas-liquid dimensionless parameters on the characteristics of the breakup modes and the jet penetration trajectory under the action of low-speed air crossflow. Experimental results showed that, two breakup modes of liquid jets injected into low-speed air crossflow were attained, including column breakup and bag breakup, among which column breakup can be divided into bump breakup and arcade breakup. According to the experimental regimes map based on the q and Wej of breakup processes, the q and the Wej together determined the jet breakup mode under low-speed air crossflow conditions. The transition boundary curve between different breakup modes were found. In addition, the logarithmic formula of jet penetration trajectory curve based on dimensionless parameters such as liquid-gas momentum flux ratio q, liquid Wej, liquid Rej, can well predict the liquid jet penetration trajectory under the action of low-speed air crossflow, and the flux-momentum ratio q is the main dimensionless parameter that affects jet penetration trajectory.

Key words: gas-liquid flow, liquid injection, primary breakup, mixing, breakup modes, jet penetration trajectory

摘要:

基于专门搭建的射流破碎雾化实验平台,利用高速摄像可视化研究低速横流作用下不同气液量纲为1参数对液体射流初次破碎模式特征和射流穿透轨迹特征的影响规律。实验结果表明,低速横流作用下液体射流破碎存在柱状破碎和袋式破碎两种模式,其中柱状破碎又可以分为鼓包破碎和拱形破碎。从实验得到的液气动量通量比q和液体韦伯数Wej射流破碎模式图可以看出,液气动量通量比q和液体韦伯数Wej共同决定低速横流条件下射流破碎模式,不同破碎模式之间存在明显的过渡边界。结合液气动量通量比q、液体韦伯数Wej、液体雷诺数Rej等量纲为1参数,拟合得到了射流穿透轨迹曲线对数形式公式,该公式能够很好地预测低速横流作用下液体射流穿透轨迹,其中液气动量通量比q是影响射流穿透轨迹的主要量纲为1参数。

关键词: 气液两相流, 液体射流, 初次破碎, 混合, 破碎模式, 射流穿透轨迹

CLC Number: 

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