In order to assess current societal problem associated with the sonic boom, a horn-type simulator was constructed at the Institute for Aerospace Studies, University of Toronto (UTIAL). The simulator horn is in the form of a horizontal concrete pyramid, which is 25 m long and has 3-m-square base. At its apex a specially-designed value is used to control the mass-flow rate of air from a high-pressure reservoir into the horn where the flow generates a simulated sonic boom or travelling N-wave of suitable amplitude and duration, and acceptably-short rise time. Alternatively, a shock-tube driver can be installed at the apex and used for generating short-duration and rapid rise-time sonic booms. For the mass-flow valve mode of operation of high-frequency sound absorber can be installed near the apex of the horn to filter out of the passing N-wave undesirable jet noise that is produced by the high-speed turbulent flow at the valve.


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    Title :

    Simulation of a Travelling Sonic Boom in a Pyramidal Horn


    Contributors:

    Publication date :

    1974


    Size :

    231 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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