Reduction of a Micro-Pressure Wave by a Round Hood at a Tunnel Portal of a High-Speed Railway

Takahashi, Katsuhiko; Honda, Akira; Nozawa, Kojiro; Doi, Tetsuya; Ogawa, Takanobu

doi:10.2208/jscejseee.71.167

Cited by 5 publications

(1 citation statement)

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“…For instance, Masahiro Sugesawa et al [1] conducted a full-scale test on the aerodynamics of MLX01 test train, such as surface pressure, rear-end flow separation, air resistance, micro-pressure waves, and the interior/exterior noise features. Through full-scale and reduced-scale tests, Kazuya Takahashi [2] and Atsushi Honda [3][4] examined the features of the micro-pressure wave and the performance of the tunnel buffer structure when a maglev train passes through the tunnel. Saito Tsutoshi [5] identified the relationship between initial compression wave and micro-pressure wave during the tunnel operation of high-speed maglev trains.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of pressure waves induced by high-speed maglev trains passing through tunnels

Jia¹,

Yuan-gui²

2018

IJHT

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This paper aims to determine the proper cross-sectional area for tunnels on high-speed maglev lines and support the optimization of the airtightness design for high-speed maglev trains. For these purposes, the pressure fluctuations in the tunnel operation of two maglev trains with the speed up to 650km/h were simulated using the 1D compressible unsteady non-homentropic flow model and the method of characteristics. The simulation results were compared to those from the reduced-scale test in Japan and full-scale test in China. The comparison proves that our 1D model is a rational and efficient tool for pressure wave prediction. Through repeated computations of the 1D model, the critical tunnel lengths were obtained. Then, the effects of tunnel length, tunnel cross-sectional area, train speed and train length on maximum pressure variation were identified one by one. The research findings provide a valuable reference for the tunnel and train design on high-speed maglev lines.

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Section: Introductionmentioning

confidence: 99%

Numerical simulation of pressure waves induced by high-speed maglev trains passing through tunnels

Jia¹,

Yuan-gui²

2018

IJHT

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Preliminary Study on Clearance Area of Single-Line High-Speed Maglev Tunnel Based on Passenger Pressure Comfort

杜¹

2021

IJM

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Research on Aerodynamic Load Coupling of a High-Speed Maglev Train Passing through the Tunnel

刘

2024

IJM

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Reduction of a Micro-Pressure Wave by a Round Hood at a Tunnel Portal of a High-Speed Railway

Cited by 5 publications

References 1 publication

Numerical simulation of pressure waves induced by high-speed maglev trains passing through tunnels

Numerical simulation of pressure waves induced by high-speed maglev trains passing through tunnels

Preliminary Study on Clearance Area of Single-Line High-Speed Maglev Tunnel Based on Passenger Pressure Comfort

Research on Aerodynamic Load Coupling of a High-Speed Maglev Train Passing through the Tunnel

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