Computational Technology Resources - CCC

D. Yamamoto, "Reduction Technique for Braking Distance of Railway Vehicles via Dry Air Jetting", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 14.1, 2024, doi:10.4203/ccc.7.14.1

Keywords: railway vehicle, wheel/rail, low adhesion, high-humidity conditions, friction coefficient, braking distance, dry-air injection.

Abstract

This paper describes that the technique for temporarily improving the friction force by jetting dry air with less than 30% humidity on the contact surface, and results of the fundamental measurement experiment of the tangential contact force using the small two-disk rolling machine. In the fundamental experiment, the tangential contact force coefficient increased simultaneously with dry-air injection and remained stable during dry-air injection under dry and high-humidity conditions. It was also confirmed that tangential contact force improvement effect of dry-air injection depended on the surface properties of the contact surface of the specimens. Furthermore, as an example of a dry-air injection system application, we proposed the technique of shortening the braking distance of the rail vehicles based on the results of the fundamental experiment, and its validity of the proposed technique was confirmed using a vehicle dynamics analysis.

download the full-text of this paper (PDF, 12 pages, 1014 Kb)

go to the previous paper
go to the next paper
return to the table of contents
return to the volume description

	Computational & Technology Resources an online resource for computational, engineering & technology publications
	not logged in - login
Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 7 PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 14.1 Reduction Technique for Braking Distance of Railway Vehicles via Dry Air Jetting D. Yamamoto Computational Mechanics Laboratory, Railway Technical Research Institute, Tokyo, Japan doi:10.4203/ccc.7.14.1 Full Bibliographic Reference for this paper D. Yamamoto, "Reduction Technique for Braking Distance of Railway Vehicles via Dry Air Jetting", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 14.1, 2024, doi:10.4203/ccc.7.14.1 Keywords: railway vehicle, wheel/rail, low adhesion, high-humidity conditions, friction coefficient, braking distance, dry-air injection. Abstract This paper describes that the technique for temporarily improving the friction force by jetting dry air with less than 30% humidity on the contact surface, and results of the fundamental measurement experiment of the tangential contact force using the small two-disk rolling machine. In the fundamental experiment, the tangential contact force coefficient increased simultaneously with dry-air injection and remained stable during dry-air injection under dry and high-humidity conditions. It was also confirmed that tangential contact force improvement effect of dry-air injection depended on the surface properties of the contact surface of the specimens. Furthermore, as an example of a dry-air injection system application, we proposed the technique of shortening the braking distance of the rail vehicles based on the results of the fundamental experiment, and its validity of the proposed technique was confirmed using a vehicle dynamics analysis. download the full-text of this paper (PDF, 12 pages, 1014 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
Back to top	©Civil-Comp Limited 2023 - terms & conditions