汽车轮胎磨损颗粒物扩散特性的数值模拟研究
PDF下载 (352)卢 轩,黄海波,张 涛,董家楠.汽车轮胎磨损颗粒物扩散特性的数值模拟研究[J].宁波大学学报(理工版),2019,32(1):44-51.DOI:
LU Xuan,HUANG Hai-bo,ZHANG Tao,DONG Jia-nan.Numerical simulation on diffusion characteristics of car tire wear particles[J].Journal of Ningbo University(Natural Science & Engineering Edition),2019,32(1):44-51.DOI:
| Title: | Numerical simulation on diffusion characteristics of car tire wear particles |
| 作者: | 卢 轩, 黄海波, 张 涛, 董家楠 |
| Author(s): | LU Xuan, HUANG Hai-bo, ZHANG Tao, DONG Jia-nan |
| 关键词: | 轮胎磨损颗粒物; 运动轨迹; 扩散特性; 数值模拟 |
| Keywords: | tire wear particles; trajectories; diffusion characteristics; Numerical simulation |
| 分类号: | U501 |
| 文献标识码: | A |
| 摘要: | 为了解汽车轮胎磨损颗粒物的扩散特性, 采用离散相模型方法, 考虑离散相和流体相的双向耦合作用, 利用Rosin-Rammler粒径分布模型, 模拟了不同工况下汽车行驶过程中轮胎磨损颗粒物的运动轨迹. 结果表明: 汽车尾部旋转涡流对颗粒物扩散横向距离有较大影响, 对扩散高度影响不大. 当距离汽车前轮中心竖直平面后方一定时, 颗粒物扩散高度与车速基本呈线性关系. 在距离汽车前轮中心竖直平面后方5m时, 地面处不同位置颗粒物质量浓度变化呈双峰分布, 而在距离为10m时呈单峰分布, 与气流在截面形成不同尺度的漩涡有关. 车速相同时, 粒径越大, 颗粒物沉积越显著. 随着车速的增大, 0.1~10μm的颗粒物在地面处质量浓度不断降低; 10~200 μm的颗粒物在地面处质量浓度先增大后减小, 并在车速为60km·h-1时达到最大值. |
| Abstract: | In order to understand the diffusion characteristics of car tire wear particles, a discrete phase model method was used. The two-way coupling of discrete and fluid phase was considered. Rosin-Rammler distribution was utilized to describe the particle size distribution. The trajectories of tire wear particles when driving under different working conditions were simulated. The results indicate that the rotating vortex at the rear of the vehicle has a great influence on the transverse distance of particle diffusion, but has little effect on the diffusion height. When the distance from the center vertical plane of the front wheel is constant, the dispersion height has a linear relationship with the car speed. At the distance of 5m behind the center vertical plane of the front wheel, the particle concentration at different positions on the ground shows a bimodal distribution, while it is a unimodal distribution at the distance of 10m, which is related to the formation of vortices at different sections. At the same speed, particle deposition is more significant with the larger particle size. When the particle size is 0.1-10μm, the particle concentration on the ground decreases with the increase of the car speed. When the particle size is 10-200μm, the particle concentration increases first and then decreases with the increase of the car speed, and reaches the maximum at 60km·h-1. |
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| 备注/Memo: | 收稿日期: 2018－03－01. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/基金项目: 国家自然科学基金（51205213）; 浙江省大学生科技创新活动计划暨新苗人才计划（2016R405070）.第一作者: 卢轩（1990－）, 男, 湖北荆州人, 在读硕士研究生, 主要研究方向: 轮胎摩擦磨损. E-mail: 1141800408@qq.com*通信作者: 黄海波（1978－）, 男, 山东临沂人, 教授, 主要研究方向: 滚动体的摩擦磨损. E-mail: huanghaibo@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
