At high pressure and low temperature, gases in pipelines behave as real gases rather than ideal gases. The Van der Waals equation was used to represent the properties of real gases and the Fourier-Bessel-based acoustic model was extended to real gas cases. The effects of frequency, Mach number and the radius of a pipe on the plane waves in real gases were investigated. The results indicated that plane waves travel more slowly in the real gas model than in the ideal gas model while the attenuation coefficient is higher in the real gas model. Higher frequency waves and a larger radius of pipe can strengthen the influence of the real gas. Flow with higher Mach number weakens the influence of the real gas in the downstream propagation while it intensifies the influence in the upstream propagation.
License type:
PublisherCopyrights
Funding Info:
This work was funded in part under Energy Innovation
Research Programme (EIRP) Award NRF2014EWT-EIRP003-
028, administrated by the Energy Market Authority (EMA).
The EIRP is a competitive grant call initiative driven by the
Energy Innovation Programme Office and funded by the
National Research Foundation (NRF) of Singapore.