Numerical Simulation of Turbine Expander in Natural Gas Pressure Energy Power Generation System

Abstract In this paper, the numerical simulation method is used to study the aerodynamic characteristics of the runoff turbine expander, the key equipment in the natural gas pressure energy recovery power generation system. The geometric structure of the turbine expander under the condition of sub-high pressure natural gas expansion was designed and the flow characteristics of the internal flow field during its operation were obtained by numerical simulation. It is found that the expansion process of fluid in the runoff turbine expander mainly occurs in the guide vane channel and the inlet section of the rotor channel. The turbine expander designed in this paper can well meet the working requirements under design conditions, and the flow in the whole channel is good. When the flow channel in the moving impeller changes from radial to axial, the flow field is complex and there is a poor flow. The research results of this paper provide a reference for the design and optimization of runoff turbine expander in natural gas pressure energy power generation system.