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ORIGINAL PAPER
Experimental Regulating Parameters of Bladder-Type Hydraulic Accumulator
1
Department of Hydraulic and Water Engineering, Lviv Polytechnic National University, Karpinsky Str. 6/103, 79013, Lviv, Ukraine
Online publication date: 2022-03-17
Publication date: 2022-03-01
International Journal of Applied Mechanics and Engineering 2022;27(1):232-243
KEYWORDS
ABSTRACT
Experimental regulating parameters of the non-stationary expansion of air inside a bladder-type hydraulic accumulator, working with the simple short pipeline, are presented in the paper. The technique of continuous online monitoring of changes in time of volume and absolute air pressure inside the hydraulic accumulator during the discharge process has been improved. Three series of experimental studies of transient gas processes inside the accumulator at different values of the average volume flow rate are made. Tendencies of change of the integral parameters of the hydraulic accumulator are obtained and analyzed depending on the serial number of the discharge cycle. A general dependence of dimensionless storage volume Kreg on the polytropic index n in series # 1–3, approximated by single power-law dependence, is obtained. The systematic changes of integral parameters in each subsequent discharge cycle can be explained by the non-stationary transient thermodynamic processes in air inside the accumulator until the thermodynamic equilibrium with the ambient air parameters is reached.
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