液滴与水平壁面碰撞力的数值研究

张彬; 韩强; 袁小芳; 李景银

doi:10.7652/xjtuxb201309004

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液滴与水平壁面碰撞力的数值研究

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- 液滴与水平壁面碰撞力的数值研究
- Simulation of Impact Force of Drop Impacting on Horizontal Plate
- 西安交通大学学报 2013年47卷第9期页码：23-27
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
  
  李景银(通信作者),男,教授,博士生导师。基金项目: 国家科技重大专项资助项目(2017-II-0007-0021)
- 基金信息：
  
  : 2013-01-21。作者简介: 张彬(1989—),男,博士生;李景银(通信作者),男,教授,博士生导师。基金项目: 国家自然科学基金资助项目(51276137);中央高校基本科研业务费专项资金资助项目
- DOI：10.7652/xjtuxb201309004
  中图分类号： TK05
- 网络首发：2013-09-10，
  
  纸质出版：2013
- 稿件说明：
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张彬, 韩强, 袁小芳, 等. 液滴与水平壁面碰撞力的数值研究[J]. 西安交通大学学报, 2013,47(9):23-27.

Simulation of Impact Force of Drop Impacting on Horizontal Plate[J]. 2013, 47(9): 23-27.
张彬, 韩强, 袁小芳, 等. 液滴与水平壁面碰撞力的数值研究[J]. 西安交通大学学报, 2013,47(9):23-27. DOI： 10.7652/xjtuxb201309004.

Simulation of Impact Force of Drop Impacting on Horizontal Plate[J]. 2013, 47(9): 23-27. DOI： 10.7652/xjtuxb201309004.

摘要

为探究叶轮机械内部液滴与固壁之间碰撞引起的壁面磨损破坏的机理

采用流体体积方法

数值研究液滴直径、碰撞速度和液滴与壁面之间的接触角对液滴与壁面碰撞的瞬态碰撞力发展变化的影响。研究结果表明

液滴与壁面之间的接触角对液滴碰撞过程中的碰撞力几乎没有影响

但对于不同雷诺数和韦伯数下的液滴

其与静止壁面的碰撞力按液滴直径的2.118次方和速度的1.761次方正则化后

碰撞力的无量纲时间曲线基本重合

且碰撞力峰值出现的无量纲时刻为0.26

即同样直径的液滴

碰撞速度越大

到达碰撞力峰值所用时间越短

对同样速度的液滴

液滴直径越大

则液滴到达碰撞力峰值所用时间越长。

Abstract

In order to understand the mechanism of surface erosion caused by the impact of liquid drops on the blade in the turbomachinery

the effects of contact angle

drop diameter and impact velocity on the impact force of a drop colliding with a stationary plate were discussed with the VOF method. The results show that the impact force is slightly affected by the variation in contact angle but considerably influenced by the change in the droplet diameter and impact velocity. Moreover

if the impact force is normalized by the product of the 2.118

power of the droplet diameter and the 1.761

power of the droplet impact velocity

the curves of the normalized forces for drops at different Re and We numbers verse dimensionless time almost all collapse into a single curve

and the normalized peak force occurs at the dimensionless time of 0.26.

This indicates that the same size drop at a higher velocity experiences its peak impact force at an earlier time while the impact force of a larger drop at the same velocity reaches its peak at a later time.

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references

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