VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Experimental determination of the speed of sound in hydraulic lines
    Prek, Matjaž ; Butala, Vincenc
    Vibro-acoustic energy travels through pipe walls as longitudinal and flexural waves, apart from the sound waves through the fluid medium inside. Longitudinal waves in pipe wall are coupled to sound ... waves inside by means of the pipe wall Poisson's ratio. One of the most common examples of this form of interaction is observed in water-filled pipes in which the flexibility of the walls significantly alters the speed of propagation of acoustic disturbances along the pipe. This interaction is most evident in viscoelastic pipes, which takes into account the effect of viscoelasticity of the pipe wall material on the wave propagation. In order to determine the speed ofsound in water-filled pipes, the pressure transfer function between points along pipe is experimentally determined. For this purpose the measurement of fluid-borne sound pressure via pressure transducers (hydrophones) is used. The equivalent wavespeed and frequency-dependent attenuation factor is determined from this measurement data. With this data, the standard impedance or transfer matrix could be directly used to analyse resonating conditions in hydraulic lines. Experimental results for four different pipe wall materials, with particular application to the water supply installations, are presented.
    Vir: Proceedings [Računalniška datoteka] (Vol1_ch47.pdf (str. 441-448))
    Vrsta gradiva - prispevek na konferenci
    Leto - 1999
    Jezik - angleški
    COBISS.SI-ID - 3252507

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