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A platform for research: civil engineering, architecture and urbanism
Dynamic analysis of the effect of platoon configuration on train aerodynamic performance
https://orcid.org/0000-0003-0652-553X
Abstract The improved delayed detached eddy simulation (IDDES) was used to study the influence of the platoon configuration of trains on its aerodynamic performance. CFD simulations were validated against the wind tunnel test and different mesh refinement to further verify the flow field around the high-speed train. The platoon configuration mainly affects the aerodynamic forces of the tail car of the front train (car3) and the head car of the rear train (car4) through flow interference. The surface pressure distribution of the train and the time domain and frequency domain characteristics of the aerodynamic force under different spacing are analyzed, and the changing law of the aerodynamic force and the lateral stability of the trains are summarized. The boundary layer and slipstream of trains in platoon are also compared with those of single trains. Meanwhile, both the time-averaged and instantaneous near-wake structures are compared for different cases.
Highlights IDDES k-w turbulence model is used to model the wake interaction and detailed flow field structure. The aerodynamic force, slipstream, and boundary layer under different spacing are evaluated. The dominant equivalent full-scale frequency (Hz) at 300 km/h lies between 1.87 and 3.33 Hz (). The largest oscillating side forces for the car4 in platoon is 157.62 N.
Dynamic analysis of the effect of platoon configuration on train aerodynamic performance
https://orcid.org/0000-0003-0652-553X
Abstract The improved delayed detached eddy simulation (IDDES) was used to study the influence of the platoon configuration of trains on its aerodynamic performance. CFD simulations were validated against the wind tunnel test and different mesh refinement to further verify the flow field around the high-speed train. The platoon configuration mainly affects the aerodynamic forces of the tail car of the front train (car3) and the head car of the rear train (car4) through flow interference. The surface pressure distribution of the train and the time domain and frequency domain characteristics of the aerodynamic force under different spacing are analyzed, and the changing law of the aerodynamic force and the lateral stability of the trains are summarized. The boundary layer and slipstream of trains in platoon are also compared with those of single trains. Meanwhile, both the time-averaged and instantaneous near-wake structures are compared for different cases.
Highlights IDDES k-w turbulence model is used to model the wake interaction and detailed flow field structure. The aerodynamic force, slipstream, and boundary layer under different spacing are evaluated. The dominant equivalent full-scale frequency (Hz) at 300 km/h lies between 1.87 and 3.33 Hz (). The largest oscillating side forces for the car4 in platoon is 157.62 N.
Dynamic analysis of the effect of platoon configuration on train aerodynamic performance
https://orcid.org/0000-0003-0652-553X
Abstract The improved delayed detached eddy simulation (IDDES) was used to study the influence of the platoon configuration of trains on its aerodynamic performance. CFD simulations were validated against the wind tunnel test and different mesh refinement to further verify the flow field around the high-speed train. The platoon configuration mainly affects the aerodynamic forces of the tail car of the front train (car3) and the head car of the rear train (car4) through flow interference. The surface pressure distribution of the train and the time domain and frequency domain characteristics of the aerodynamic force under different spacing are analyzed, and the changing law of the aerodynamic force and the lateral stability of the trains are summarized. The boundary layer and slipstream of trains in platoon are also compared with those of single trains. Meanwhile, both the time-averaged and instantaneous near-wake structures are compared for different cases.
Highlights IDDES k-w turbulence model is used to model the wake interaction and detailed flow field structure. The aerodynamic force, slipstream, and boundary layer under different spacing are evaluated. The dominant equivalent full-scale frequency (Hz) at 300 km/h lies between 1.87 and 3.33 Hz (). The largest oscillating side forces for the car4 in platoon is 157.62 N.
Dynamic analysis of the effect of platoon configuration on train aerodynamic performance
Chen, Guang (author) / Liang, Xi-Feng (author) / Li, Xiao-Bai (author) / Zhou, Dan (author) / Lien, Fue-sang (author) / Wang, Jiangbo (author)
2021-02-10
Article (Journal)
Electronic Resource
English
Introducing Platoon Dispersion into an Analytical Dynamic Assignment Process
| British Library Online Contents | 2000
Introducing Platoon Dispersion into an Analytical Dynamic Assignment Process
| British Library Conference Proceedings | 2000