ALSTOM TRANSPORT SA, 33 Rue des Bateliers, 93400, Saint-Ouen, France.
LAMIH Laboratory, UMR CNRS 8201, Polytechnic University of Hauts-de-France, 59300, Valenciennes, France.
Environ Sci Pollut Res Int. 2020 May;27(15):18615-18631. doi: 10.1007/s11356-020-08337-8. Epub 2020 Mar 21.
The particulate matter emissions related to the braking of railway rolling stock are investigated using a reduced scale braking device. Samples of organic materials and cast iron discs are tested for different nominal contact pressures and disc surface temperatures, representative of real conditions. The aim of this work is to investigate the influence of braking conditions on the global amount of particles emitted, their distribution in number and size, and their morphological and chemical characteristics. To be representative, the tested conditions are designed to dissipate the same amount of energy for all the braking events by adjusting the pad application duration. The results show that for the same dissipated energy, a temperature increase above a transition value in the range of 230-280 C depending on the braking conditions modifies the size and number distributions of the generated particles. The results obtained are of interest to better represent their propagation through CFD modelling according to the characteristic of the particle emission.
采用缩尺制动装置研究了与铁路车辆制动相关的颗粒物排放。针对不同名义接触压力和代表性实际条件下的圆盘表面温度，对有机材料和铸铁圆盘样本进行了测试。本工作旨在研究制动条件对排放颗粒总量、颗粒数量和尺寸分布以及颗粒形貌和化学特性的影响。为了具有代表性，通过调整刹车片的应用持续时间，将测试条件设计为使所有制动事件耗散相同的能量。结果表明，对于相同的耗散能量，取决于制动条件，温度升高超过 230-280°C 的转变值会改变生成颗粒的大小和数量分布。获得的结果有助于根据颗粒排放特性，通过 CFD 建模更好地表示其传播。
