Novikov L.A. Gas-dynamic parameters of the district pipelines with condensate accumulations

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Parent Category: Geo-Technical Mechanics, 2016

Category: Geo-Technical Mechanics, 2016, Issue 128

GAS-DYNAMIC PARAMETERS OF THEDISTRICT PIPELINES WITH CONDENSATE ACCUMULATIONS

Novikov L.A.

Novikov L.A., Master of Science

(IGTM NAS of Ukraine)

 Abstract.The change in volumetric flow rate of the gas mixture and concentration of methane in the areas of vacuum gas-pipeline network and its assemblies is considered with taking into account air inflow through the flanged pipe connections. Correlation is presented for determining the gas mixture density by known values оf volume fractions of the mixture components. Interdependence is established between the flow sections of the pipeline in the areas with condensate accumulations and liquid level in the most constricted part of the pipeline. In order to compute gas dynamics of the gas-drainage pipeline with condensate accumulations, it is proposed to assume the same value of absolute equivalent surface roughness of the pipeline inner surface as of the pipe after a long period of operation. The article describes character of changes in the absolute pressure of the gas mixture along the length of unpressurized pipe with local sediments, as well as interdependence between turbulent component of aerodynamic resistance of the pipeline and absolute equivalent roughness of the pipeline inner surface.

Keywords: gas mixture, gas-drainage pipeline, gas pipeline network, aerodynamic drag, condensate accumulation.

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REFERENCES

1. Novikov, L.A. (2011), “Determination of the losses pressure on polluted area of vacuum degassing pipeline”, Geo-Technical Mechanics, no. 92, pp. 258-263.

2. Novikov, L.A. (2014), “Impact of disperse phase on hydraulic resistance of district degassing pipelines”, Geo-Technical Mechanics, no. 114, pp. 154-161.

3. Bokiy, A.B., Dudlya, Ye.Ye. and Novikov, L.A., (2015), “Decision of rational parameters for designing of methane transportation within coal deposits”, Geo-Technical Mechanics, no. 125, pp. 189-201.

4. Novikov, L..А. (2015), «Gas-dynamics of water intrusion areas of decontamination pipeline and methods of calculation of its parameters», Geo-Technical Mechanics, no. 120, pp. 234-243.

5. Yurev, A.S. (ed.) (2001), Spravochnik po raschetam ridravlicheskih i ventilyatsionnyih sistem [Reference book upon settlement of hydraulic and ventilation systems], Mir i semya, St.- Petersburg, Russia.

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About the author

Novikov Leonid Andreevich, engineer,Junior Researcherin Department of Mineral Mining at Great Depths, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Science of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.  

 

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