车端风挡形式对高速列车气动噪声的影响研究

Research on the Effect of Vestibule Diaphragm Type at the End of Vehicle on the Aerodynamic Noise of High Speed Trains

以国内某型高速列车的3车编组模型及不同形式外风挡为研究对象,采用大涡模拟和FW-H声学方程结合的计算方法,探究车端外风挡间隙和包覆面积对整车气动噪声的影响,得出增加外风挡包覆面积、采取对接密贴风挡有助于降低车端气动噪声,并通过风洞试验进行了验证。

With the 3-car model of a certain type of high speed train as well as different types of outside vestibule diaphragms in China as the object of research,the calculation method combined with the large eddy simulation and FW-H acoustic equation is applied to explore the effects of outside vestibule diagram clearance and the covering area at the end of a car on the pneumatic noise of the integral car.It is concluded that increase of the covering area of the outside vestibule diaphragm and application of the close-fitting vestibule diaphragm can help to reduce the pneumatic noise at the car end,which is verified via wind tunnel test.