휠-레일 접촉 시험기를 활용한 다양한 열차 속도에서의 살수 방법의 공기 질 향상 효과 측정 및 분석

초록

This study investigated the effectiveness of tap water application in reducing nano-sized wear particles at a wheel-railcontact interface and its impact on air quality at different train velocities. Airborne wear particles (AWPs) were simulatedusing a twin-disk rig at 500, 800, and 1,300 RPM. Mass concentration of nano-sized wear particles was measured using afast mobility particle sizer (FMPS) at a sampling frequency of 1 Hz. To simulate various vehicle dynamics and contactconditions, the slip rate was incrementally increased from 0 to 3%. During wet conditions, water was applied at a rate of 7L/min. PM0.1 and PM0.56 under dry and wet conditions were compared to evaluate the method’s effectiveness. Theanalysis showed that the tap water application method improved the air quality by reducing PM0.56 by at least 74% andPM0.1 by approximately 80%. In conclusion, the water application method can effectively improve air quality by reducinggeneration of nano-sized wear particles. The train velocity affected the generation of nano-sized wear particles under bothconditions.

키워드