Factors influencing resuspended PM2.5 from the tires of two-wheeled electric vehicles

被引：1

作者：

Wu, Juncheng ^{[1
]}

Wang, Baoqing ^{[1
]}

Xu, Xiaofan ^{[1
]}

Guo, Ao ^{[1
]}

Bai, Yanyu ^{[1
]}

Wang, Jieyu ^{[1
]}

机构：

[1] Nankai Univ, Coll Environm Sci & Engn, State Environm Protect Key Lab Urban Particulate A, Tianjin 300350, Peoples R China

来源：

WATER AIR AND SOIL POLLUTION | 2023年 / 234卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Tires; Suspended PM2.5; Road dust; CFD simulation; FLUID-DYNAMICS; WHEEL; SIMULATIONS; MODEL; TYRE; WIND; FLOW;

D O I：

10.1007/s11270-023-06640-x

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The dust resuspended by tire motion is a key cause of particulate matter pollution. The resuspension of PM2.5 by tires of a two-wheeled electric vehicle was numerically simulated using Fluent under different conditions including different tire speed, wind speed, wind direction. The average pressure on the windward and leeward sides of the tires was 10.40 and 8.79 Pa, respectively, and the average pressure on the outside and inside sides was 9.59 and 2.65 Pa, respectively, when the wheel was moving forward. The average airflow speed on the windward and leeward sides of the tire was 5.25 and 5.56 m/s. The PM2.5 concentration distribution was more centralized at the start of tire motion, and the average PM2.5 concentration in the wake flow was 1.74 x 10(-7) kg/m(3) at t = 1 s. With tire motion, PM2.5 distribution gradually spread, and the average PM2.5 concentration of the wake flow was 6.18 x 10(-7) kg/m(3) at t = 5 s. The PM2.5 resuspended by the tire decreased with z direction. The average PM2.5 concentrations at the tire center cross section at wind grade 0 for downwind and upwind were 2.70 x 10(-8) and 2.30 x 10(-8) kg/m(3), respectively. The experimental and simulation results had the highest correlation at a tire speed of 15 km/h and the lowest correlation at a tire speed of 25 km/h.

引用

页数：14