An approach for simulating the air brake system of long freight trains based on fluid dynamics
Abstract Air brake systems are critical equipment for railway trains, which affects the running safety of the trains significantly. To study air braking characteristics of long freight trains, an approach for simulating air brake systems based on fluid dynamics theory was proposed. The structures an...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2022-12-01
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| Series: | Railway Engineering Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40534-022-00291-0 |
| _version_ | 1797779075032416256 |
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| author | Xin Ge Qinghua Chen Liang Ling Wanming Zhai Kaiyun Wang |
| author_facet | Xin Ge Qinghua Chen Liang Ling Wanming Zhai Kaiyun Wang |
| author_sort | Xin Ge |
| collection | DOAJ |
| description | Abstract Air brake systems are critical equipment for railway trains, which affects the running safety of the trains significantly. To study air braking characteristics of long freight trains, an approach for simulating air brake systems based on fluid dynamics theory was proposed. The structures and working mechanisms of locomotive and wagon air brakes are introduced, and mathematical models of the pipes, brake valves, reservoirs or chambers, cylinders, etc., are presented. Besides, the dynamic motions of parts in the main valve are considered. The simulation model of the whole air brake system is then formulated, and the solving method based on the finite-difference method is used. New efficient pipe boundary conditions without iterations are developed for brake pipes and branch pipes, which can achieve higher computational efficiency. The proposed approach for simulating the air brake system is validated by comparing with published measured data. Simulation results of different train formations indicate that models that consider the dynamic behavior of brake pipes are recommended for predicting the characteristics of long trains under service braking conditions. |
| first_indexed | 2024-03-12T23:26:29Z |
| format | Article |
| id | doaj.art-bbd7ddae5be04641bc6b2bf4e4e3bdaa |
| institution | Directory Open Access Journal |
| issn | 2662-4745 2662-4753 |
| language | English |
| last_indexed | 2024-03-12T23:26:29Z |
| publishDate | 2022-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Railway Engineering Science |
| spelling | doaj.art-bbd7ddae5be04641bc6b2bf4e4e3bdaa2023-07-16T11:08:38ZengSpringerOpenRailway Engineering Science2662-47452662-47532022-12-0131212213410.1007/s40534-022-00291-0An approach for simulating the air brake system of long freight trains based on fluid dynamicsXin Ge0Qinghua Chen1Liang Ling2Wanming Zhai3Kaiyun Wang4State Key Laboratory of Traction Power, Southwest Jiaotong UniversityState Key Laboratory of Traction Power, Southwest Jiaotong UniversityState Key Laboratory of Traction Power, Southwest Jiaotong UniversityState Key Laboratory of Traction Power, Southwest Jiaotong UniversityState Key Laboratory of Traction Power, Southwest Jiaotong UniversityAbstract Air brake systems are critical equipment for railway trains, which affects the running safety of the trains significantly. To study air braking characteristics of long freight trains, an approach for simulating air brake systems based on fluid dynamics theory was proposed. The structures and working mechanisms of locomotive and wagon air brakes are introduced, and mathematical models of the pipes, brake valves, reservoirs or chambers, cylinders, etc., are presented. Besides, the dynamic motions of parts in the main valve are considered. The simulation model of the whole air brake system is then formulated, and the solving method based on the finite-difference method is used. New efficient pipe boundary conditions without iterations are developed for brake pipes and branch pipes, which can achieve higher computational efficiency. The proposed approach for simulating the air brake system is validated by comparing with published measured data. Simulation results of different train formations indicate that models that consider the dynamic behavior of brake pipes are recommended for predicting the characteristics of long trains under service braking conditions.https://doi.org/10.1007/s40534-022-00291-0Air brake systemFluid dynamicsRailway trainBoundary conditionSimulation |
| spellingShingle | Xin Ge Qinghua Chen Liang Ling Wanming Zhai Kaiyun Wang An approach for simulating the air brake system of long freight trains based on fluid dynamics Railway Engineering Science Air brake system Fluid dynamics Railway train Boundary condition Simulation |
| title | An approach for simulating the air brake system of long freight trains based on fluid dynamics |
| title_full | An approach for simulating the air brake system of long freight trains based on fluid dynamics |
| title_fullStr | An approach for simulating the air brake system of long freight trains based on fluid dynamics |
| title_full_unstemmed | An approach for simulating the air brake system of long freight trains based on fluid dynamics |
| title_short | An approach for simulating the air brake system of long freight trains based on fluid dynamics |
| title_sort | approach for simulating the air brake system of long freight trains based on fluid dynamics |
| topic | Air brake system Fluid dynamics Railway train Boundary condition Simulation |
| url | https://doi.org/10.1007/s40534-022-00291-0 |
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