Abstract Electrical railways produce airborne wear particles (AWPs) in significant amounts from wheel–rail contact. Herein, the effects of wet conditions on the AWPs released from the wheel–rail contact under different normal loads were investigated using a twin-disk rig. A fast mobility particle sizer and an optical particle sizer were used to measure number concentrations (NCs) of AWPs. Analyses of NCs and particle size distribution were conducted. The findings suggest that significantly fewer AWPs are generated under wet conditions than under dry conditions. Marked differences were also seen in the size distribution peaks between wet and dry conditions: under dry conditions, the largest peak corresponded to fine particles, whereas under wet conditions, the largest peak corresponded to ultrafine particles. The generation trends of AWPs were different for dry and wet conditions: AWPs increased and then decreased after maximal NCs under dry condition; however, they increased and then remained nearly constant under wet conditions. The total amount of ultrafine, fine, and coarse particles increased with normal load under wet conditions, indicating that AWP generation is significantly influenced by the normal load. Furthermore, water can significantly reduce the amount of ultrafine, fine, and coarse particles generated from the wheel–rail contact.

中文翻译：

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使用双盘钻机在潮湿条件下从轮轨接触中产生空气传播的磨损颗粒

摘要 电气铁路从轮轨接触中产生大量的空气传播磨损颗粒 (AWP)。在此，使用双盘钻机研究了潮湿条件对不同法向载荷下轮轨接触释放的 AWP 的影响。使用快速迁移率粒度仪和光学粒度仪测量 AWPs 的数量浓度 (NCs)。进行了NC和粒度分布的分析。研究结果表明，在潮湿条件下产生的 AWP 明显少于干燥条件下。干湿条件下的粒径分布峰也存在显着差异：在干燥条件下，最大峰对应于细颗粒，而在湿条件下，最大峰对应于超细颗粒。干、湿条件下AWPs的产生趋势不同：干燥条件下NCs达到最大后AWPs先增加后减少；然而，它们在潮湿条件下增加，然后几乎保持不变。在潮湿条件下，超细、细、粗颗粒的总量随正常载荷的增加而增加，表明 AWP 生成受正常载荷的显着影响。此外，水可以显着减少轮轨接触产生的超细、细和粗颗粒的数量。表明 AWP 生成受正常负载的显着影响。此外，水可以显着减少轮轨接触产生的超细、细和粗颗粒的数量。表明 AWP 生成受正常负载的显着影响。此外，水可以显着减少轮轨接触产生的超细、细和粗颗粒的数量。