A number of total-pressure tubes were tested in a nonstaedy flow generator in which the fraction of period that pressure is a maximum is approximately 0,8, thereby simulating turbomachine-type flow conditions. The tests were performed at a pressure level of 10(power 5) Pa (1 bar), for Mach numbers up to near 1, and frequencies up to 3 kHz. Most of the tubes indicated a pressure which was higher (P ind/P ind true up to 1,06) than the true average. Organ-pipe at discrete frequencies. resonances which further increased the indicated pressure were encountered within the tubes at discrete frequencies There was no obvious combination of tube diameter, length, and/or geometry variation used in the tests which resulted in negligible averaging error.


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    Title :

    Total-pressure-tube averaging in pulsating flows


    Additional title:

    Mittelwertbildung bei Gesamtdruckrohren in pulsierender Stroemung


    Contributors:

    Published in:

    ISA Transactions ; 13 , 2 ; 142-148


    Publication date :

    1974


    Size :

    7 Seiten, 11 Bilder, 5 Quellen


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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