非线性范畴微气压波快速预测模型  

A quick prediction model of micro-pressure wave in the non-linear range

作　　者：韦斌 唐飞 谭晓明 WEI Bin;TANG Fei;TAN Xiaoming(School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,China;China Aerodynamics Research and Development Center,Key Laboratory of Pneumatic Noise Control,Mianyang 621000,China;College of Mechanical Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China)

机构地区：[1]合肥工业大学汽车与交通工程学院,合肥230009 [2]中国空气动力研究与发展中心气动噪声控制重点实验室,四川绵阳621000 [3]湖南理工学院机械工程学院,湖南岳阳414006

出　　处：《交通科技与经济》2022年第4期55-60,共6页Technology & Economy in Areas of Communications

基　　金：气动噪声控制重点实验室研究基金项目(ANCL20200302);中央高校基本科研业务费专项基金项目(JZ2020HGQA0213)。

摘　　要：随着高速列车运行速度的不断提高,隧道出口的微气压波噪声污染问题愈发严重。高速列车穿越隧道速度增大到350 km·h^(-1)时近隧道区域形成较强的非线性声源区,其非线性随着高速列车穿越隧道的速度增大而增强。传统CFD方法计算效率较低,难以精确模拟此类现象,且用线性微气压波预测模型误差较大。针对该问题,根据现有线性微气压波预测模型,结合高阶谱差分计算气动声学模型与完全匹配层人工边界,构建非线性范畴的隧道微气压波预测模型,并与实验结果进行对比,论证该模型的准确性。结果表明:在200 km·h^(-1)、250 km·h^(-1)、300 km·h^(-1)、350 km·h^(-1)速度级下,微气压波声压峰值分别与隧道轴向距离r^(-0.87)、r^(-0.86)、r^(-0.85)、r^(-0.83)成正比。With the continuous increase of the running speed of high-speed trains,the noise pollution problem of the micro-pressure wave at the exit of the tunnel has become more and more serious.When the speed of the high-speed train passing through the tunnel increases to 350km·h^(-1),a strong non-linear sound source area is formed near the tunnel,and its non-linearity increases as the speed of the high-speed train passing through the tunnel increases.Having low computational efficiency,the traditional CFD method is difficult to accurately simulate such phenomena,and the prediction error of the linear micro-pressure wave prediction model is relatively large.To solve this problem,based on the existing linear micro-pressure wave prediction model,this paper combines the high-order spectral difference calculation aeroacoustic model and the fully matched layer artificial boundary to construct a tunnel micro-pressure wave prediction model in the nonlinear category,and compares it with the experimental results to demonstrate the accuracy of the model.The research result shows that for 200 km·h^(-1),250 km·h^(-1),300 km·h^(-1)and 350 km·h^(-1)speed levels,the peak sound pressure of the micro-pressure wave is proportional to the axial distance of the tunnel r^(-0.87),r^(-0.86),r^(-0.85) and r^(-0.83),respectively.

关 键 词：微气压波 高阶谱差分 非线性 计算气动声学 隧道轴向距离 

分 类 号：U25[交通运输工程—道路与铁道工程]