Micro-pressure wave radiated from tunnel exit
WebAug 16, 2024 · The relationship between the MPW and the nose-entry wave and the effects of train speed and the tunnel exit hole on the MPW are analyzed. The results show that the MPW decreases with... WebMay 19, 2024 · The reflection and radiation of steep-fronted wavefronts at a tunnel exit to a deep cutting is studied and contrasted with the more usual case of radiation from over-ground portals. ... Micro-pressure wave radiation from tunnel portals in deep cuttings Show all authors. Honglin Wang 1. Honglin Wang . School of Mechanical Engineering, …
Micro-pressure wave radiated from tunnel exit
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WebThis study concerns the reduction of the pressure gradient of the compression wave generated in a tunnel by the entry of a high-speed train. Influences of different parameters … WebSep 26, 2024 · The relationship between the MPW and the nose-entry wave and the effects of train speed and the tunnel exit hole on the MPW are analyzed. The results show that the MPW decreases with increasing distance from the tunnel exit, but increases rapidly with increasing train speeds.
WebUpon the entrance of a high-speed train into a relatively long train tunnel, compression waves are generated in front of the train. These compression waves subsequently coalesce into a weak shock wave so that a unpleasant sonic boom is emitted from the tunnel exit. WebApr 9, 2024 · HIGHLIGHTS. who: Dian-Qian Li and collaborators from the Key Laboratory of Traffic Safety on Track, Ministry of Education, Central South University, Changsha, China have published the article: Mitigation Effect of Helmholtz Resonator on the Micro-Pressure Wave Amplitude of a 600-km/h Maglev Train Tunnel, in the Journal: (JOURNAL) what: The …
WebDec 1, 2024 · A micro-pressure wave is discharged from the exit of the train tunnel when a compression wave induced by a high-speed train moves outside the exit of the train … WebThe authors used FLUENT (pressure based code) as their multiphase solver and the Schnerr–Sauer cavitation model. Two frequency peaks were identified to be caused by cavitation. The lower peak was reported to be related to cloud shedding at 3 kHz and the higher peak was related to the collapse of small bubbles at 6 kHz.
WebBackground-corrected sound pressure levels are identified and then compared with the source levels measured in the cavitation tunnel of the Potsdam Model Basin (SVA). It is found that free-field computations corrected by tunnel-induced effects match well with experiments up to 100 Hz (in the one-third octave band), whereas relevant ...
WebGeneration of the compression wave by a train entering a tunnel is investigated by model experiments. In the model experiments, the train and the tunnel are represented by an axisymmetric model, a three-dimensional mirror image model and … galaxy auto collision long beachWebOct 27, 1998 · An analytical investigation is made of the compression wave generated when a high-speed train enters a long tunnel with distributed venting. The compression wave amplitude is determined by train speed and the area ratio of the train and tunnel, but its rise time depends principally on the geometry of the tunnel entrance. blackberry dishesgalaxy audio pa6bt powered hot spot monitorWebApr 15, 2024 · To study the influence of launch conditions and wave interference on the stability of submersible aerial vehicles at the water–air interface, a coupling model for water-exit motion of submersible aerial vehicles was established by using the RNG k-ε turbulence model and VOF method. The water-exit processes of submersible … blackberry docs local permissionsWebMar 1, 2011 · Abstract. When a compression wave generated by a high-speed train entering a tunnel propagates through the tunnel and arrives at the tunnel exit, an impulsive … blackberry dj mixer downloadWebWhen the tunnel entry/exit wave is compared with the micro-pressure wave, the following can be said. The tunnel entry/exit wave exhibits a more complicated pat-tern than the … blackberry documents to goWebGao, Reducing pressure wave fluctuation of high-speed train in long tunnel based on connected aisle, Eng. Mechan., № 37, с. 230 Guo, Parameter study and optimization design of a hat oblique tunnel portal, Proceedings of the Institution of Mechan. galaxy australia bioinformatics