ANALYSIS OF METHODS FOR DETERMINING THE VOLUME ELASTICITY MODULUS OF A LIQUID AND ITS DEPENDENCE ON PRESSURE AND GAS CONTENT

A.S. Lunev, A.A. Nikitin
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Index terms: volume elasticity modulus, hydraulic drive, gas-liquid mixture, pressure
Abstract: This paper considers the dependence of the volume elasticity modulus of the liquid on the gas content and pressure, applicable to the hydraulic drive of self-propelled machines. The description of the processes occurring in the hydraulic drive must be made taking into account many factors and criteria. The significance of the work can be indicated by the fact that the working fluid of the hydraulic drive can not be considered as non-compressible, since it is a mixture of gas (dissolved and non-dissolved) and liquid, which is essentially a gas-liquid mixture. The dissolved gas can pass to the undissolved gas and back during the operation of the hydraulic drive and affect the wave, transient and dynamic processes. The gas dissolves at different speeds in different parts of the hydraulic drive. The results will be useful for upgrading existing hydraulic systems and designing new ones. The non-linearity of the change in the volume elasticity modulus of the liquid is especially noticeable at relatively low pressures (no more than 10 MPa)

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