摘要
提出了高速列车头车远场气动噪声的改进方案,并进行了仿真研究。首先完成了9组不同车头形状的全尺寸头车模型和流场流域的创建,并通过k-ε湍流模型计算稳态流场;其次在稳态流场的基础上,采用宽频带噪声模型计算了头车表面的气动噪声源;利用大涡模拟(LES)方法计算瞬态流场,进而获取车身外表面的压力;再基于瞬态流场,采用Lighthill声比拟理论研究了头车的远场气动噪声的计算。最后,将不同形状头车的气动噪声的仿真分析结果相对比,验证改进方法的可行性。这里的研究,将对高速列车噪声的有效控制提供一定的技术支持,有着较重要的科学意义和实际研究价值。
It proposed the methods to control the aerodynamic noise of high-speed train head,as well as the corresponding simulations. Nine groups of full-size high-speed train headsand flow fields around werefirstly modeled,and the external steady flow fields were computed by Realizable k-εturbulence model. Based on the steady flow field,aerodynamic noise sources on the train head surface and the external transient flow field were calculated by broadband acoustics source model and large eddy simulation(LES)respectively. The pressures on the train surface were obtained from the results of the transient model.Considering the transient flow field,the far-field aerodynamic noise of the train head was finally obtained based on Lighthill acoustics analogue theory. The simulated aerodynamic noise of different train heads was compared to validate the feasibility of control methods. This research is significant to the study and efficient control of the aerodynamic noise of high-speed train.
作者
姜世杰
杨松
张博宏
闻邦椿
JIANG Shi-jie;YANG Song;ZHANG Bo-hong;WEN Bang-chun(School of Mechanical Engineering&Automation,Northeastern University,Liaoning Shenyang110819,China)
出处
《机械设计与制造》
北大核心
2020年第8期175-179,共5页
Machinery Design & Manufacture
基金
教育部基本科研业务费项目—高速列车外部气动噪声的精确预测与特性分析研究(N150303003)
国家自然科学基金—利用振动提高FDM 3D打印产品机械性能机理研究(51705068)。
