Aerodynamic force and flow field analysis of the discharge speed regulation process of the pipeline inner detector

It is necessary to study the aerodynamic force and the surrounding flow field state of the detector in the natural gas pipeline in the discharge process. Based on CFD(Computational Fluid Dynamics)methods, the ANSYS-ICEM and CFX software are applied to generate the three-dimensional compressible steady-state physical model, Flow field of the detector and the upstream and downstream pipelines was simulated. The k-ɛ turbulence model and the real gas state equation are simulated calculation. The aerodynamic force of the detector increases with the relative velocity of the medium. The aerodynamic force increases with the decrease of the discharge cross-sectional area, and the smaller the discharge area, the faster the growth rate. The pressure and velocity distributions of the flow field around the detector are analyzed. It shows that the method can provide data support and technical support for the design of detector speed control structure and the research of control scheme.