This paper describes the progress of an ongoing project with the ultimate goal to develop a method for acoustic indoor tests of aircraft engines. Measurements with a turbofan aircraft engine in the indoor test-stand of Lufthansa Technik are described. A linear microphone array has been set up using a special arrangement that has been patented by DLR that minimises the effect of reflected sound waves. It is demonstrated that with a beamforming algorithm that uses a small, 'sliding' sub-array, it is possible to measure differences between the sound fields of different engine modifications.


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    Title :

    Beamforming on a turbofan engine in an indoor test-facility


    Additional title:

    Strahlformung bei einem Flugzeugbläsertriebwerk in einen Innenraumprüfanlage


    Contributors:


    Publication date :

    2008


    Size :

    11 Seiten, 13 Bilder, 13 Quellen



    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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