Calculation grid and turbulence model for numerical simulating pressure fluctuations in high-speed train tunnel

Ji, Peng; Wang, Tiantian; Wu, Fan

doi:10.1007/s11771-019-4220-6

Cited by 19 publications

(4 citation statements)

References 14 publications

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“…After that, multiple compression and expansion waves are transmitted to section S6, and the pressure increases and decreases accordingly. The transmission of the aerodynamic pressure waves in the enclosed housing for sound emission alleviation is also consistent with those in tunnels, as reported by Liu et al [47] and Ji et al [48]. Figure 12 shows the pressure distribution on the wall of the housing for sound emission alleviation when t = 6 s. The video of the train transition with pressure shown is given in the attachment.…”

Section: Wave Propagationsupporting

confidence: 83%

“…The aerodynamics inside the enclosed housing for sound emission allevia similar to those of tunnels [47,48]. When the train approaches the entrance of the e The pressure curves show that all sections suffer both positive and negative aerodynamic pressures.…”

Section: Wave Propagationmentioning

confidence: 99%

“…The aerodynamics inside the enclosed housing for sound emission alleviation are similar to those of tunnels [47,48]. When the train approaches the entrance of the enclosed housing for sound emission alleviation, the train head induces a compression wave, and the train rear motivates an expansion wave.…”

Section: Wave Propagationmentioning

confidence: 99%

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Dynamic Characteristics of Unsteady Aerodynamic Pressure on an Enclosed Housing for Sound Emission Alleviation Caused by a Passing High-Speed Train

Jing

et al. 2022

Applied Sciences

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Train speed is increasing due to the development of high-speed railway technology. However, high-speed trains generate more noise and discomfort for residents, enclosed housing for sound emission alleviation is needed to further reduce noise. Because these enclosed housings for sound emission alleviation restrain the air flow, strong and complicated aerodynamic pressures are generated inside the housing for sound emission alleviation when a train passes through at a high speed. This train-induced aerodynamic pressure, particularly its dynamic characteristics, is a key parameter in structural design. In the present study, the train-induced unsteady aerodynamic pressure in an enclosed housing for sound emission alleviation is simulated using the dynamic mesh method, and the dynamic characteristics of the aerodynamic pressure are investigated. The simulation results show that when the train is running in the enclosed housing for sound emission alleviation, the unsteady aerodynamic pressure is complicated and aperiodic, and after the train leaves the housing for sound emission alleviation, the aerodynamic pressure reverts to periodic decay curves. Two new terms, the duration of the extreme aerodynamic pressure and the pressure change rate, are proposed to evaluate the dynamic characteristics when the train passes through the barrier. The dominant frequency and decay rate are adopted to express the dynamic characteristics after the train exits. When the train runs in the enclosed housing for sound emission alleviation, the longest durations of the positive and negative extreme aerodynamic pressures are in the middle section, and the maximum change rate of aerodynamic pressure occurs at the entrance area. After the train exits the housing for sound emission alleviation, the pressure amplitude at the central region is always higher than those close to the entrance/exit. The dominant frequency of the aerodynamic pressure is identified and explained using wave propagation theory, the decay rate of the aerodynamic pressure at all sections is close.

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Section: Wave Propagationsupporting

confidence: 83%

Section: Wave Propagationmentioning

confidence: 99%

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Dynamic Characteristics of Unsteady Aerodynamic Pressure on an Enclosed Housing for Sound Emission Alleviation Caused by a Passing High-Speed Train

Jing

et al. 2022

Applied Sciences

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“…Kim et al (Kim and Kim, 2007) conducted an experimental analysis of train-induced unsteady flow in a 1/20 scale model tunnel and conducted a three-dimensional unsteady numerical study of the submerged motion boundary during the entire train operating process using the sharp interface method. Ji et al (2019) used a sliding grid to simulate the entire process of a high-speed train passing through a tunnel. Deng et al (2020) developed a simulation model for a train passing through a tunnel–bridge–tunnel system using the dynamic layered mesh method, and analyzed the fluctuation amplitudes of five aerodynamic coefficients when the train switched operations.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the horizontal vibration response under gas–solid coupling throughout the entire high-speed elevator operating process

Shi

Zhang

et al. 2022

Journal of Vibration and Control

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High-speed elevator cars affected by external excitations exhibit complex horizontal vibration responses during their entire operating processes. To accurately explore the horizontal vibration response of a car and the response differences between the operating processes, a gas–solid coupling model for the entire high-speed elevator operating process was developed based on the finite volume method, Lagrange’s theorem, and the external excitations obtained from dynamic mesh technology and the time-variant guideway excitation simulation method. The differences in the car’s horizontal vibration acceleration and the effect of the fluid load disturbance during different high-speed elevator operating processes were analyzed by considering the different operating characteristics of the car during its acceleration–uniform speed–deceleration process. The feasibility of the model and modeling method were verified by testing an actual 7 m/s high-speed elevator. The results showed that the horizontal vibration acceleration of the car reached its maximum value during the uniform speed process, and the shaft fluid pressure load had the most significant effect on the horizontal vibration response of the car during the deceleration process.

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Hydrogen Energy Application in Rail Transit Under the “Double Carbon” Strategy: The State of the Art and Prospects

Jianying

2024

Springer Proceedings in Physics

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Calculation grid and turbulence model for numerical simulating pressure fluctuations in high-speed train tunnel

Cited by 19 publications

References 14 publications

Dynamic Characteristics of Unsteady Aerodynamic Pressure on an Enclosed Housing for Sound Emission Alleviation Caused by a Passing High-Speed Train

Dynamic Characteristics of Unsteady Aerodynamic Pressure on an Enclosed Housing for Sound Emission Alleviation Caused by a Passing High-Speed Train

Analysis of the horizontal vibration response under gas–solid coupling throughout the entire high-speed elevator operating process

Hydrogen Energy Application in Rail Transit Under the “Double Carbon” Strategy: The State of the Art and Prospects

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