Running Rate Control Of Detector Within Gas Pipeline

Deformation and corrosion damage gas pipeline defect information available through the pipeline detector test analysis. Detector within the gas pipeline in the pipeline transmission of gas pressure driven by the road, controls the speed of the detector within a reasonable, help to improve the detection accuracy of pipeline defects. In this paper, the detector within the gas pipeline running speed control problem, discharge device according to the detector mechanical structure to establish a simulation model, detector based on the actual working conditions of operation set the boundary conditions were simulated. Detection of gas pipeline within the state of the discharge flow, obtain cross-sectional area of discharge openings and the pressure difference between the gas to control the speed detector. With the development of computer technology and research and application of turbulence theory, computational fluid dynamics within the gas pipeline has become the detector of the speed control of an important means.The development and application of computational fluid dynamics and other aspects are described and discussed the selection of numerical methods. By ANSYS ICEM-CFD mesh generation software module within the detector built by the discharge device model unstructured hexahedral grid division into internal and CFD software ANSYS CFX model of the detector device outside the discharge flow the numerical simulation. This paper discusses the cross-sectional area of pipe diameter area is 40%,50%,60% of the discharge model of the gas pressure distribution and air velocity distribution within the detector has been the discharge orifice area in different turbulent kinetic energy under the residual turbulent energy bulk state, the axial momentum residuals and the pressure downstream of the discharge hole poor number of parameters, reflecting the intuitive discharge device when the fluid flows through the distribution of the flow field, and the numerical results obtained from a detailed analysis, discharge hole diameter obtained the pressure in different situations.By means of numerical simulation using CFD internal discharge device detector to study the flow field, the system has accumulated the flow field research methods to build a research platform, thereby starting the actual experiment for the field to the reference.