The influence of gas volume fractions on deformation and volumetric efficiency of twin-screw multiphase pump based on fluid–thermal–structure coupling numerical calculation

The twin-screw multiphase pump shows a significant phenomenon of fluid–thermal–structure physics field coupling. method studying dynamics, thermodynamic characteristics, and deformation the screw is biased from actual boundary conditions without considering multi-field To enhance calculation accuracy integrated further determine clearances between rotors liner, coupling completed by ANSYS WORKBENCH. results leakage rate are verified experiments. moving reference frame dynamic mesh used in fluid domain numerical simulation, non-equilibrium wall function to solve layer. rotor liner deformations their influences on volumetric efficiency studied under different gas volume fractions. optimal installation proposed reduce flow prevent sticking due large deformation. show that calculated good agreement with experimental values, average deviation less than 4%. research program effectively ensures whole model provides an important basis for design pump.