液滴与水平壁面碰撞力的实验方法

张彬; 郭朋华; 李景银

doi:10.7652/xjtuxb201511002

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液滴与水平壁面碰撞力的实验方法

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- 液滴与水平壁面碰撞力的实验方法
- Experimental Research on Impact Force of Drop Impacting on Horizontal Plate
- 西安交通大学学报 2015年49卷第11期页码：8-13
- 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：
  
  : 2015-01-31。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(51276137,51406155)
- DOI：10.7652/xjtuxb201511002
  中图分类号： TK05
- 网络首发：2015-11-10，
  
  纸质出版：2015
- 稿件说明：
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张彬, 郭朋华, 李景银. 液滴与水平壁面碰撞力的实验方法[J]. 西安交通大学学报, 2015,49(11):8-13.

Experimental Research on Impact Force of Drop Impacting on Horizontal Plate[J]. 2015, 49(11): 8-13.
张彬, 郭朋华, 李景银. 液滴与水平壁面碰撞力的实验方法[J]. 西安交通大学学报, 2015,49(11):8-13. DOI： 10.7652/xjtuxb201511002.

Experimental Research on Impact Force of Drop Impacting on Horizontal Plate[J]. 2015, 49(11): 8-13. DOI： 10.7652/xjtuxb201511002.

摘要

为了获得准确的碰撞力数据

根据液滴碰撞过程极其短暂且低速液滴碰撞力较小的特点

搭建了低速液滴与固体壁面碰撞力测量实验台; 通过理论分析和实验验证对液滴碰撞力测量系统进行了优化

以探究系统振动对瞬态碰撞力结果的影响; 利用滤波等措施消除影响后获得低速液滴和固体壁面碰撞过程的碰撞力。实验中使用压电传感器来测量碰撞力随时间变化的过程

同时将测量系统简化为双振子模型

以分析基座和碰撞盘的振动对碰撞力信号的影响; 通过进行实验结果的频谱分析来验证理论模型

同时找出影响碰撞力信号波动的因素。实验表明:基座和碰撞盘的振动会导致碰撞力曲线出现波动

增大基座质量可以消除基座振动的影响

减小碰撞盘的质量并结合低通滤波可以消除碰撞盘振动的影响。测试系统可以实现不同液滴直径、不同碰撞速度和物性的液滴碰撞力的采集和处理。

Abstract

The force of a low-speed drop impacting on the wall is tiny with a short duration. To measure the impact force precisely

an experimental rig was developed by adding a high-precision piezoelectric sensor. The measuring system was optimized based on both theoretical analysis and experimental verification

and the effect of system vibration on the transient impact force was investigated. The precise impact force can be obtained in terms of filters and other measures to eliminate the signals of the system vibration. In this approach

a double oscillator model was adopted to analyze the effect of the substrate and impact plate masses on the impacting force signal. Then the experimental frequency spectrums were compared to verify the vibration model

and the factors causing the fluctuation of force signals were determined. It is found that the vibration of the substrate and the impact plate is responsible for the fluctuation of force signal

which can be eliminated by choosing a very heavy substrate and a light impact plate combined with low-pass filter. Such an improved experimental system can measure the impact force of drops with different properties

diameters and impact velocities.

关键词

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references

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