Detecting gas leaks by ultrasonic emission

  • Rasmussen, Karsten Bo (Project Manager)
  • Henriksen, Eigil (Project Participant)

    Project Details


    The emission of noise in the frequency range from 10 to 25.6 kHz from an experimental gas leak in a flanged joint has been investigated experimentally. The overall conclusion is that the emitted noise level is almost independent of the frequency within the considered frequency range.
    A small PC-program for estimation of the attenuation of sound during free field propagation outdoors has been developed and used for simulations. A number of curves of sound attenuation under varying temperature and humidity conditions have been calculated. A crude overall estimate is provided.
    Computer simulations of the influence of the ground reflection on the received sound level have been carried out. These simulations have been carried out for the case of no wind and for one downwind and one upwind example. One of the conclusions is that the receiver should be located several metres over the ground in order to reduce the influence from upwind conditions.
    Most of this investigation took place in 1996, but the report was written in 1997. The project was carried out in cooperation with Innova Air Tech Instruments.
    Effective start/end date15/10/199615/01/1997

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