High speed train noise emission: Latest investigation of the aerodynamic/rolling noise contribution

Mellet, C.; Létourneaux, F.; Poisson, Franck; Talotte, Corinne

doi:10.1016/j.jsv.2005.08.069

Cited by 153 publications

(94 citation statements)

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“…For high-speed trains, it is generally accepted that the aerodynamic noise becomes an important source at running speeds over about 300 km/h [1][2][3]. The main aeroacoustic sources on high-speed trains identified by various studies [2,4] are the bogie, the pantograph, the recess of the pantograph, the inter-coach spacing, etc.…”

Section: Introductionmentioning

confidence: 99%

“…The main aeroacoustic sources on high-speed trains identified by various studies [2,4] are the bogie, the pantograph, the recess of the pantograph, the inter-coach spacing, etc. As one of the main aerodynamic noise sources of high-speed trains, the bogie is a complex structure containing many components with surface shape variations and discontinuities, thus the flow generated around it is highly turbulent [2,3] and some methods, like mounting the bogie skirts on the bogies, were studied to modify the flow developed there [5]. Moreover, the bogie region is situated close to the ground and is moving at high speed relative to the ground so it is necessary to consider the influence of the ground on the aerodynamic and aeroacoustic behaviour around the bogie areas.…”

Section: Introductionmentioning

confidence: 99%

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The effect of a moving ground on the flow and aerodynamic noise behaviour of a simplified high-speed train bogie

Zhu

Thompson

2016

International Journal of Rail Transportation

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Aeroacoustic sources around the train bogie area are particularly important but involve complex flow. In this study, a numerical investigation is presented of the effect of a moving ground on the flow and aeroacoustic noise behaviour of a train bogie. These make use of the delayed detached-eddy simulation combined with an acoustic analogy for noise prediction. First the flow around an isolated wheelset (1:5 scale) is calculated when it is in proximity to the ground and this is compared with wind-tunnel measurements to verify the simulation. Then the flow and aerodynamic noise behaviour of a simplified high-speed train bogie at scale 1:10 with and without the ground underneath are studied numerically. It is found that a highly turbulent flow is generated within the bogie cavity and the ground increases the noise levels by 6-8 dB due to a combination of acoustic reflection from the ground and modifications to the flow.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of a moving ground on the flow and aerodynamic noise behaviour of a simplified high-speed train bogie

Zhu

Thompson

2016

International Journal of Rail Transportation

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“…The sound power of aerodynamic noise increases with the sixth order of the running speed. As the speed of high speed trains increases, the contribution of aerodynamic noise becomes predominant (Mellet et al, 2006). As a result, when the train is running at a high speed, the overall noise level can never be reduced if only the reduction of mechanical noise is considered.…”

Section: Introductionmentioning

confidence: 99%

Identification and Suppression of Noise Sources Around High Speed Trains

Sun¹,

Guo²,

Yao³

et al. 2013

Engineering Applications of Computational Fluid Mechanics

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Aerodynamic noise would become a significant limiting factor as the running speed of high speed trains increases, and should be taken into consideration during the design of high speed trains. In the present work, the Nonlinear Acoustics Solver (NLAS) has been adopted to investigate the aerodynamic noise of high speed trains. The region around the streamlined head of the leading car and the trailing car, the bogie region, the upstream zone and the wake zone are discussed and the distribution characteristics of aerodynamic noise sources around a high speed train is exhibited. The acoustic characteristics of the streamlined head could be contaminated due to the unreasonable arrangement of cab windows or cowcatchers. As a result, different designs of cab windows and cowcatchers are investigated in this paper and advice on low noise design is given. Based on the above analysis, a new design of the streamlined head is proposed. Numerical results reveal that the noise level of the new streamline has been greatly suppressed. The analysis would aid in identification of noise sources around high speed trains and design of high speed trains with low noise.

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“…The other one is that emitted by turbulent fluctuations, which mostly locates in the turbulent boundary layer around the surface of high speed trains or in places where flow separations take place. As the speed of high speed trains increases, the contribution from rolling noise and aerodynamic noise changes (Mellet et al, 2006). The sound power of aerodynamic noise increases with the sixth order of the running speed, indicating that the aerodynamic noise must not be ignored when the train runs at a high speed.…”

Section: Introductionmentioning

confidence: 99%

“…Currently the study on aerodynamic noise of high speed trains mainly includes experiments and numerical approaches. The former can be specified into two kinds, namely the real vehicle tests and wind tunnel investigations on scaled models (Mellet et al, 2006;Nagakura, 2006). Real vehicle tests suffer from a long time period and too much input for manpower and material resources.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Aerodynamic Noise Generated by High Speed Trains

Sun

Song

2012

Engineering Applications of Computational Fluid Mechanics

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Aerodynamic noise becomes more and more significant and sometimes could be predominant as the running speed of high speed trains increases. As a result, aerodynamic noise has to be taken into consideration during the design of high speed trains. In present work, the research on aerodynamic noise of the high speed train with a speed of 300 km/h has been performed. The nonlinear acoustics solver (NLAS) approach is adopted to study the aerodynamic noise in the near field of the high speed train. With the use of an acoustic surface, the research on the aerodynamic noise in the far field has been carried out by solving the Ffowcs-Williams/Hawking (FW-H) equation. At first the method validation is performed through a two-dimensional backward step case, which shows excellent agreement with experimental results. The characteristics of the flow field dominate the generation of aerodynamic noise, therefore the flow field is firstly analyzed, including the head, the rear, and the inter-coach spacing of the train. By use of probes in specific regions on the surface of the train, the contribution of different parts of the train to the aerodynamic noise is discussed. Meanwhile, the far field feature of aerodynamic noise is also studied by placing probes in the far field. Based on the above analysis, the aerodynamic noise performance of the specific high speed train is assessed.

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High speed train noise emission: Latest investigation of the aerodynamic/rolling noise contribution

Cited by 153 publications

References 0 publications

The effect of a moving ground on the flow and aerodynamic noise behaviour of a simplified high-speed train bogie

The effect of a moving ground on the flow and aerodynamic noise behaviour of a simplified high-speed train bogie

Identification and Suppression of Noise Sources Around High Speed Trains

Numerical Simulation of Aerodynamic Noise Generated by High Speed Trains

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