Influence of the Head Wind on Determining Braking Performance of Zacns Tank Wagon
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2022
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From the aspect of safety, brakes of rail vehicles are an extremely important system on the vehicle. Braking performance affects the normal functioning of vehicles and interoperability of rail vehicles in classic railway train compositions. All trains, classic and different type of motor trains must conform with the available stopping distances, which are predefined by the railway signalling, i.e. control length of a signal and depends on the maximum allowable speed for which the track section is designed. Apart from that, in classic wagons, which are combined and participate in the formation of different train compositions, mutual compatibility must be ensured from the aspect of used braking equipment and connection subassemblies, but even more important, braking performance of all wagons in the train has to be uniform within certain tolerances. This prevents weaker braked wagons from running into stronger braked ones, which can cause longitudinal jerks and may in extremes lead to a t...rain rupture. Stopping distance during brake application depends on train braking performances, longitudinal running resistance and presence of wind and its direction. This paper deals with the influence of wind conditions on the results of slip brake tests and the estimation of a single vehicle's braking performance. Based on experimental measurements, simulations using CFD and comparison with the obtained results, this paper proposes a possibility to extract air drag resistance and wind force from the total resistance force. Presented methodology and obtained results may serve for further simulations of aerodynamic characteristics apart from braking performance, such as vehicle running resistance, energy consumption, etc. and for optimization of the wagon shape and design.
Кључне речи:
stopping distance / slip brake tests / numerical simulations / head wind influence / drag coefficientИзвор:
Acta Polytechnica Hungarica, 2022, 19, 6, 81-98Издавач:
- Budapest Tech Polytechnical Institution
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200105 (Универзитет у Београду, Машински факултет) (RS-MESTD-inst-2020-200105)
Колекције
Институција/група
Mašinski fakultetTY - JOUR AU - Radulović, Saša AU - Milković, Dragan AU - Raković, Milan AU - Simić, Goran AU - Kostić, Aleksandra PY - 2022 UR - https://machinery.mas.bg.ac.rs/handle/123456789/3828 AB - From the aspect of safety, brakes of rail vehicles are an extremely important system on the vehicle. Braking performance affects the normal functioning of vehicles and interoperability of rail vehicles in classic railway train compositions. All trains, classic and different type of motor trains must conform with the available stopping distances, which are predefined by the railway signalling, i.e. control length of a signal and depends on the maximum allowable speed for which the track section is designed. Apart from that, in classic wagons, which are combined and participate in the formation of different train compositions, mutual compatibility must be ensured from the aspect of used braking equipment and connection subassemblies, but even more important, braking performance of all wagons in the train has to be uniform within certain tolerances. This prevents weaker braked wagons from running into stronger braked ones, which can cause longitudinal jerks and may in extremes lead to a train rupture. Stopping distance during brake application depends on train braking performances, longitudinal running resistance and presence of wind and its direction. This paper deals with the influence of wind conditions on the results of slip brake tests and the estimation of a single vehicle's braking performance. Based on experimental measurements, simulations using CFD and comparison with the obtained results, this paper proposes a possibility to extract air drag resistance and wind force from the total resistance force. Presented methodology and obtained results may serve for further simulations of aerodynamic characteristics apart from braking performance, such as vehicle running resistance, energy consumption, etc. and for optimization of the wagon shape and design. PB - Budapest Tech Polytechnical Institution T2 - Acta Polytechnica Hungarica T1 - Influence of the Head Wind on Determining Braking Performance of Zacns Tank Wagon EP - 98 IS - 6 SP - 81 VL - 19 UR - https://hdl.handle.net/21.15107/rcub_machinery_3828 ER -
@article{ author = "Radulović, Saša and Milković, Dragan and Raković, Milan and Simić, Goran and Kostić, Aleksandra", year = "2022", abstract = "From the aspect of safety, brakes of rail vehicles are an extremely important system on the vehicle. Braking performance affects the normal functioning of vehicles and interoperability of rail vehicles in classic railway train compositions. All trains, classic and different type of motor trains must conform with the available stopping distances, which are predefined by the railway signalling, i.e. control length of a signal and depends on the maximum allowable speed for which the track section is designed. Apart from that, in classic wagons, which are combined and participate in the formation of different train compositions, mutual compatibility must be ensured from the aspect of used braking equipment and connection subassemblies, but even more important, braking performance of all wagons in the train has to be uniform within certain tolerances. This prevents weaker braked wagons from running into stronger braked ones, which can cause longitudinal jerks and may in extremes lead to a train rupture. Stopping distance during brake application depends on train braking performances, longitudinal running resistance and presence of wind and its direction. This paper deals with the influence of wind conditions on the results of slip brake tests and the estimation of a single vehicle's braking performance. Based on experimental measurements, simulations using CFD and comparison with the obtained results, this paper proposes a possibility to extract air drag resistance and wind force from the total resistance force. Presented methodology and obtained results may serve for further simulations of aerodynamic characteristics apart from braking performance, such as vehicle running resistance, energy consumption, etc. and for optimization of the wagon shape and design.", publisher = "Budapest Tech Polytechnical Institution", journal = "Acta Polytechnica Hungarica", title = "Influence of the Head Wind on Determining Braking Performance of Zacns Tank Wagon", pages = "98-81", number = "6", volume = "19", url = "https://hdl.handle.net/21.15107/rcub_machinery_3828" }
Radulović, S., Milković, D., Raković, M., Simić, G.,& Kostić, A.. (2022). Influence of the Head Wind on Determining Braking Performance of Zacns Tank Wagon. in Acta Polytechnica Hungarica Budapest Tech Polytechnical Institution., 19(6), 81-98. https://hdl.handle.net/21.15107/rcub_machinery_3828
Radulović S, Milković D, Raković M, Simić G, Kostić A. Influence of the Head Wind on Determining Braking Performance of Zacns Tank Wagon. in Acta Polytechnica Hungarica. 2022;19(6):81-98. https://hdl.handle.net/21.15107/rcub_machinery_3828 .
Radulović, Saša, Milković, Dragan, Raković, Milan, Simić, Goran, Kostić, Aleksandra, "Influence of the Head Wind on Determining Braking Performance of Zacns Tank Wagon" in Acta Polytechnica Hungarica, 19, no. 6 (2022):81-98, https://hdl.handle.net/21.15107/rcub_machinery_3828 .