Research On Numerical Simulation Of Heating Pipeline Leakage Detection

As the city infrastructure construction is gradually improved, the number of heating pipe especially the underground heating piper are also growing. However in view of corrosion, aging, construction and so on, underground pipeline leakage events are also occured, it will bring certain influence to the safe operation of the power station as well as the normal heating work. It has important practical significance to accurately judge leakage occurred in the specific location and range of influence fast after the pipeline leakage, This artical uses Fluent software to simulate and analysis the different leakage type, it has a certain guiding significance for judging underground heating pipe leakage type from the surface temperature change.By using Fluent software for different leakage type to the numerical simulation and comparative analysis, it will supply judgments and references from the surface temperature change of underground heating pipe leakage.It will be calculated By setting the same initial conditions and the heat transfer boundary conditions under different conditions, the surface temperature distribution of different, so the focus is analysis of temperature values on then surface line, at the same time according to the surface temperature distribution of different forms, I will finally draws the different forms of surface temperature field corresponding to different from the surface, so It will provide references as to the change of temperature field analysis of underground leakage condition.The2D simulation results show that:the surface will be different after leakage occurred;at the same time in the initial and boundary conditions, the surface temperature extremum points tend to leakage inclined side. The3D simulation results can prove that: corresponding to the different disclosure form, the surface temperature distribution will have the obvious differencer The first leakage surface integral average temperature will has improved as2D results; at the same time as the leakage occurred the temperatur of surface appears relatively high area and is a generally circular shape, but the radius is smaller for the leakage of hole;This central area will reveal the location and leakage of fluid outlet direction of the tilt and offset as well. The results show that, by monitoring the temperature of land surface changes to determine the underground heating pipeline leakage is feasible, it can be used as an important reference.