Calculation of Liquid Flow Through Pump-Compressor Slot Seal Made in the Form of Hydrodiode

Abstract

The results of study of a piston hybrid machine that combines the function of a positive displacement pumpcum-compressor unit are reported. A distinctive feature of the studied machine is the presence between the piston and the cylinder wall of a slot seal made in the form of a hydrodiode. A numerical model of the motion of an incompressible viscous liquid in the channel of the hydrodiode made in 3D axisymmetric formulation is proposed. The turbulence effects are determined using SST (shear-stress transport) model. It is shown that the rate of liquid flow through the slot seal depends on the direction of motion. The physical nature of this phenomenon is analyzed.