The invention relates to a high-speed train aerodynamic noise jet flow noise reduction system which comprises the arrangement of a jet flow air collecting port position and a jet flow nozzle position, air needed by jet flow is collected on the front end face of a cowcatcher, the air is automatically collected through train advancing power, and the collected air is conveyed to a nozzle to be sprayed out through an inner cavity. The jet nozzles are distributed at the front edge of the bogie cavity and comprise the cowcatcher bottom and the side face of a vehicle body. The jet flow disturbs falling of a train surface shear layer after being sprayed out, so that the falling high-speed shear layer is far away from the bogie, a low-speed area is formed in the bogie area, and high-speed airflow is prevented from directly impacting the rear bogie and the surface of a cavity of the rear bogie to reduce the aerodynamic sound source of the surface of the rear bogie. Compared with the prior art, the pneumatic noise generated by the bogie area in the train running process can be effectively and economically reduced, and meanwhile the pneumatic noise reduction device has the advantages that additional weight is not increased, safety and reliability are achieved, and an additional power source is not needed.

    本发明涉及一种高速列车气动噪声射流降噪系统,包括射流空气采集口的位置和射流喷口位置的布置,射流所需空气采集于排障器前端面,利用列车前行动力自动采集空气,采集空气经过内部腔体传送至喷嘴喷出,射流喷嘴分布于转向架腔体的前缘位置,包括排障器底部和车体侧面两部分。射流在喷出后对列车表面剪切层的脱落进行干扰,使脱落的高速剪切层远离转向架,从而在转向架区域形成低速区,防止高速气流直接撞击后部转向架和其腔室表面从而降低其表面气动声源。与现有技术相比,本发明能够通过有效且经济的方式降低列车运行过程中由转向架区域产生的气动噪声,同时具有不增加附加重量,安全可靠,无需额外动力源等优点。


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Jet flow noise reduction system for aerodynamic noise of high-speed train


    Weitere Titelangaben:

    一种高速列车气动噪声射流降噪系统


    Beteiligte:
    HE YUAN (Autor:in) / THOMPSON DAVID (Autor:in) / HU ZHIWEI (Autor:in) / SHENG XIAOZHEN (Autor:in)

    Erscheinungsdatum :

    2023-01-03


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B61C Lokomotiven , LOCOMOTIVES



    High-speed train workshop cavity jet flow noise reduction system

    LIU DAOWEI / MIAO XIAODAN / ZHANG ZIHENG et al. | Europäisches Patentamt | 2023

    Freier Zugriff

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

    Mellet, C. / Letourneaux, F. / Poisson, F. et al. | Tema Archiv | 2006



    High-speed train cowcatcher structure capable of reducing aerodynamic noise

    GAO YANG / LIU QINGBO / DUAN WEIYI et al. | Europäisches Patentamt | 2020

    Freier Zugriff

    Development of low aerodynamic noise pantograph for high speed train

    Ikeda, M. / Morikawa, T. / Manabe, K. et al. | British Library Conference Proceedings | 1994