The present invention relates to a sound absorbing structure and an aircraft propulsion system including the sound absorbing structure. The sound absorption structure comprises a porous layer (32) incontact with a medium through which sound waves travel, a honeycomb layer (34) comprising a plurality of cells (38) and having at least one outer annular channel (40, 40 ') open towards the porous layer (32), and a reflective layer (36). The invention also relates to the aircraft propulsion system comprising at least one sound absorbing structure. The sound absorbing structure according to the present invention allows the noise to be attenuated within a wide frequency band, in addition, can obtain the performance similar to that of the prior art while has a significantly smaller thickness.

    吸声结构和包括所述吸声结构的飞行器推进系统。本发明涉及一种吸声结构,所述吸声结构包括:多孔层(32),所述多孔层与声波行进穿过的介质相接触,蜂窝状层(34),所述蜂窝状层包括多个小室(38),所述蜂窝状层具有朝向所述多孔层(32)开放的至少一个外部环形通道(40,40’),以及反射层(36)。本发明还涉及一种包括至少一个这种吸声结构的飞行器推进系统。根据本发明的吸声结构允许噪声在宽频带内衰减,此外可以获得与现有技术相类似的性能,同时具有明显更小的厚度。


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    Title :

    Sound absorbing structure and aircraft propulsion system including sound absorbing structure


    Additional title:

    吸声结构和包括所述吸声结构的飞行器推进系统


    Contributors:

    Publication date :

    2020-05-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse



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