Abstract Modern, low-emission aero-engine concepts, such as, for instance, Ultrahigh-Bypass Ratio (UHBR) designs, claim higher demands on the damping performance of acoustic wall treatment, called liner, installed in the engine. New liner concepts are needed providing a more broadband damping efficiency ranging explicitly to the low-frequency range. However, space and weight constrains are still also one of the crucial criteria which need to be fulfilled by the liner structure. To overcome this challenge, two novel liner concepts are presented here. One concept, the hybrid ZML, combines the classical Single-Degree-of-Freedom (SDOF) liner with a Zero-Massflow-Liner (ZML) principle. The other one, the FlexiS concept, takes advantage of the intrinsic material damping of flexible walls within the liner structure. A proof of concepts study of both novel concepts is provided highlighting the enhanced damping performance with respect to broadband capacity and low-frequency damping.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Novel liner concepts


    Contributors:
    Bake, F. (author) / Knobloch, K. (author)

    Published in:

    Publication date :

    2019




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    50.03 Methoden und Techniken der Ingenieurwissenschaften / 50.03 Methoden und Techniken der Ingenieurwissenschaften, Methoden und Techniken der Ingenieurwissenschaften / 55.50 Luftfahrzeugtechnik / 55.50 Luftfahrzeugtechnik, Luftfahrzeugtechnik
    DDC:    629.105



    New cylinder liner and piston concepts

    Borchsenius, H.-J. | Online Contents | 1998


    New headliner and bonnet liner concepts

    Van Gassel, T. | Tema Archive | 1993


    Evaluation of Novel Liner Concepts for Fan and Airframe Noise Reduction

    Jones, Michael G. / Howerton, Brian M. | AIAA | 2016



    Evaluation of Novel Liner Concepts for Fan and Airframe Noise Reduction (AIAA 2016-2787)

    Jones, Michael G. / Howerton, Brian M. | British Library Conference Proceedings | 2016