化工学报 ›› 2022, Vol. 73 ›› Issue (3): 1147-1156.doi: 10.11949/0438-1157.20211620

• 流体力学与传递现象 • 上一篇    下一篇

基于最优传质系数的槽型结构参数对液膜机械密封汽化特性影响及优化

许晓东(),马晨波(),孙见君,张玉言,於秋萍   

  1. 南京林业大学机械电子工程学院，江苏 南京 210037
  • 收稿日期:2021-11-11 修回日期:2021-12-18 出版日期:2022-03-15 发布日期:2022-03-14
  • 通讯作者: 马晨波 E-mail:759063234@qq.com;mahaibo62@163.com
  • 作者简介:许晓东(1996—），男，硕士研究生，759063234@qq.com
  • 基金资助:
    国家重点研发计划项目(20l8YFB2000800);国家自然科学基金项目(52075268);江苏省重点研发计划项目(BE2021062)

Influence and optimization of groove structure parameters on vaporization characteristics of liquid film mechanical seals based on optimal mass transfer coefficient

Xiaodong XU(),Chenbo MA(),Jianjun SUN,Yuyan ZHANG,Qiuping YU   

  1. College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu，China
  • Received:2021-11-11 Revised:2021-12-18 Published:2022-03-15 Online:2022-03-14
  • Contact: Chenbo MA E-mail:759063234@qq.com;mahaibo62@163.com

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摘要：

在获取Lee相变传质方程中最优传质系数的基础上，研究了螺旋角、槽径比、槽堰比以及槽深等槽型结构参数对液膜机械密封汽化特性(平均汽相体积分数表征)的影响规律，并基于均匀试验设计方法和响应面法探明了槽型结构参数之间的交互作用。最后以槽型结构参数为设计变量，以平均汽相体积分数为优化目标，采用遗传算法获得了结构参数的最优解范围。研究表明：平均汽相体积分数随着螺旋角、槽堰比、槽深的增大而增大，随着槽径比的增大先增加再减小；槽堰比和槽深交互影响极其显著，螺旋角和槽深交互影响较为显著；螺旋角、槽径比、槽堰比以及槽深分别在25.0°~28.0°、0.10~0.30、0.10~0.25和4.0~6.0 μm时，可以获得较优的平均汽相体积分数值。

关键词: 汽化, 传质系数, 结构参数, 平均汽相体积分数, 交互作用

Abstract:

On the basis of obtaining the optimal mass transfer coefficient in the Lee phase change mass transfer equation, the influence of the groove structure parameters such as helix angle, groove diameter ratio, groove weir ratio and groove depth on the vaporization characteristics of liquid film mechanical seals (characterization of average vapor phase volume fraction) is studied. And based on the uniform experimental design method and the response surface method, the interaction between the groove structure parameters is proved. Finally, the trough structural parameters are used as design variables, the average vapor phase volume fraction is used as the optimization objective, and the constraints are commonly used and empirically selected, and the genetic algorithm is used to obtain the optimal solution range of the structural parameters. Research shows that the average vapor phase volume fraction increases with the increase of helix angle, slot-weir ratio, and slot depth, and first increases and then decreases with the increase of slot-diameter ratio. The interaction between slot-weir ratio and groove depth is extremely significant, and the interaction between helix angle and groove depth is more significant. When the helix angle, groove diameter ratio, groove weir ratio and groove depth are 25.0°—28.0°, 0.10—0.30, 0.10—0.25 and 4.0—6.0 μm, better average vapor phase volume fraction values can be obtained.

Key words: vaporization, mass transfer coefficient, structural parameters, average vapor phase volume fraction, interaction

中图分类号: 

  • TH 117
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