碰撞速度和碰撞角度对典型材料起电影响

doi:10.12382/bgxb.2022.0083

摘要/Abstract

摘要：

针对飞行器沉积静电问题,以典型材料起电电压为研究对象,进一步探索在不同碰撞角度、碰撞速度条件下,典型材料与空气颗粒物碰撞后的起电变化规律。采取模拟试验和仿真分析相结合的方式,重点研究空气颗粒物碰撞角度和碰撞速度对于典型材料的起电影响,初步得出部分材料起电电压随碰撞角度和碰撞速度的变化规律。试验结果表明:典型材料起电电压随着碰撞角度的增加近似呈线性增大,随着碰撞速度的增加近似呈线性增大;碰撞速度会影响接触面积和接触模式,碰撞角度会影响接触面积中不同模式所占比例,二者共同影响着典型材料起电电压的变化。

关键词: 沉积静电, 典型材料, 空气颗粒物, 碰撞角度, 碰撞速度

Abstract:

This study aims to address the problem of electrostatic deposition in aircraft by exploring the electrification voltage of typical materials. The focus is on understanding the change in electrification voltage after collisions between typical materials and air particles at different collision angles and speeds. This research approach involves a combination of simulation tests and analysis, with the goal of understanding the influence of collision angle and speed of air particles on the electrification of typical materials as well as preliminarily unveiling the change law of electrification voltage of certain materials. The results show that the electrification voltage of the typical material increases approximately linearly with an increase in collision angle and speed. The collision speed affects the contact area and mode, while the collision angle affects the proportion of different modes in the contact area, both of which impact the change in electrification voltage of typical materials.

Key words: electrostatic deposition, typical material, air particles, collision angle, collision speed

翟维鹏, 胡小锋, 周帅, 王莹莹. 碰撞速度和碰撞角度对典型材料起电影响[J]. 兵工学报, 2023, 44(5): 1358-1364.

ZHAI Weipeng, HU Xiaofeng, ZHOU Shuai, WANG Yingying. Impact of Collision Speeds and Angles on Electrification of Typical Materials[J]. Acta Armamentarii, 2023, 44(5): 1358-1364.

图/表 10

图1 试验装置连接示意图

Fig.1 Schematic diagram of the test setup

图2 PVC起电电压值随碰撞角度变化趋势

Fig.2 Variation of PVC electrification voltage value with collision angle

图3 聚四氟乙烯起电电压值随碰撞角度变化趋势

Fig.3 Variation of PTFE electrification voltage value with collision angle

图4 有机玻璃起电电压值随碰撞角度变化趋势

Fig.4 Variation of plexiglass electrification voltage value with collision angle

图5 仿真模型示意图

Fig.5 Schematic diagram of the simulation model

表1 不同碰撞角度的接触参数

Table 1 Contact parameters at different collision angles

角度/ (°)	位移差/m	最大位移量时间点/s	接触面积/m²
30	4.06×10^-3	4.15×10^-4	0.001357168
45	5.42×10^-3	3.51×10^-4	0.001790708
60	6.55×10^-3	3.19×10^-4	0.002139424
75	7.25×10^-3	3.35×10^-4	0.002277655
90	7.49×10^-3	3.35×10^-4	0.002353053

图6 不同碰撞角度的起电量

Fig.6 Electrification amount of different collision angles

图7 3种材料起电电压值随碰撞速度变化趋势

Fig.7 Variation of electrification voltage with collision speed for three materials

表2 不同碰撞速度的接触参数

Table 2 Contact parameters at different collision velocities

速度/ (m·s^-1)	位移差/m	最大位移量时间点/s	接触面积/ m²
50	7.49×10^-3	3.35×10^-4	0.00235
100	1.44×10^-2	2.72×10^-4	0.00452
200	2.71×10^-2	2.36×10^-4	0.00851
340	4.26×10^-2	2.15×10^-4	0.01338
680	7.34×10^-2	1.80×10^-4	0.02306
1020	9.75×10^-2	1.59×10^-4	0.03063

图8 不同碰撞速度的起电量

Fig.8 Electrification amount of different collision velocities

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