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针对铁路提速后高速列车集电部气动噪声过大的问题,在集电部引入导流罩,应用FLUENT对不含导流罩及含导流罩集电部的外流场和气动噪声分别进行数值模拟和分析.流场计算采用稳态雷诺平均纳维斯托克斯(Reynolds Averaged Navier-Stokes,RANS)方法,声学模型选择边界层噪声模型.计算结果表明导流罩的设计至关重要,合理的设计能使得导流罩较好地引导气流,起到降低集电部气动噪声的作用.
Aiming at the problem of high aerodynamic noise in the collector of high-speed train after the railway speeding up, a shroud is introduced into the collector to apply the FLUENT to the outflow field and the aerodynamic noise of the collector excluding the shroud and the shroud, respectively Numerical simulation and analysis of flow field The steady-state Reynolds Averaged Navier-Stokes (RANS) method and the acoustic model are used to select the boundary layer noise model.The calculation results show that the design of the shroud is very important, Reasonable design can make the shroud better guide the air flow, play a role in reducing aerodynamic noise collector.