인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
This study investigates the effectiveness of the tap water method in reducing nano-sized wear particles (mass concentration) from wheel-rail contact for air quality improvement, by using a small-sized twin-disk rig at train speeds of 45 and 80 km/h. A diffusion dryer is used to eliminate the water vapor expected to be generated due to frictional heat in tap water application. To verify the effectiveness of tap water application, the experiment was repeated twice for each rotational speed under dry and wet conditions. A Fast Mobility Particle Sizer (FMPS) was used to measure the mass concentration of particles in the 5.6 to 560 nm range, and mean values were used to calculate particle size mass distribution and PM0.035, PM0.1, and PM0.56 to analyze air quality improvement. The results showed that mass concentrations of particles below 35 nm in size were reduced at both train speeds, and this is deemed to be the effect of water vapor elimination using the diffusion dryer. The reduction rates were 50% or higher at most particle sizes, and over 95% for PM0.56, higher than results from earlier studies. Therefore, the tap water method is deemed to be effective in improving air quality through the actual reduction of nano-sized wear particles generated in wheel-rail contact.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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