A Generalized Approach to the Analysis of Feed Unevenness in Displacement Pumps

A generalized approach to the analysis of feed unevenness in positive displacement pumps is considered. A procedure for calculating the working processes in chambers of constant or variable volume in a discharge line as well as a nonstationary one-dimensional gas flow in a discharge pipe is develope...

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Bibliographic Details
Published in:Chemical and petroleum engineering 2019-09, Vol.55 (5-6), p.402-411
Main Authors: Shcherba, V. E., Shalai, V. V., Pavlyuchenko, E. A.
Format: Article
Language:English
Subjects:
Boundary conditions
Chambers
Chemistry
Chemistry and Materials Science
Compressors
Discharge pipes
Gas flow
Geotechnical Engineering & Applied Earth Sciences
Industrial Chemistry/Chemical Engineering
Industrial Pollution Prevention
Mathematical analysis
Mineral Resources
One dimensional flow
Pipeline Fittings
Positive displacement pumps
Pumps
Unevenness
Variation
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Summary:A generalized approach to the analysis of feed unevenness in positive displacement pumps is considered. A procedure for calculating the working processes in chambers of constant or variable volume in a discharge line as well as a nonstationary one-dimensional gas flow in a discharge pipe is developed. Boundary conditions are defined. Nonstationary one-dimensional flow is calculated by the method of “characteristics.” By means of a numerical experiment, variations in the pressure in the working chambers and along the length of the pipe as a function of the turning angle of the shaft are established. On the basis of pressure fluctuation in a discharge pipe, it is proved that the feed unevenness significantly exceeds the magnitude of the feed unevenness determined when the pressure fluctuation is not taken into account.
ISSN:0009-2355
1573-8329
DOI:10.1007/s10556-019-00637-2