چكيده به لاتين
The accuracy of the leakage detection method largely depends on the flow and leakage parameters in the distribution and transmission pipeline network. The purpose of this study is to analyze and design a fluid-floating moving system that is suitable for identifying in-pipe leaks in a water distribution network and to investigate the effect of parameters including geometry and diameter of leakage, different pipeline pressures and fluid type like water and crude oil, in leakage and pressure drop across the pipe. Investigating whether leaks are causing enough pressure drop? What are the dimensions of the pressure drop? Does the type of fluid and the size of the leak affect this amount? How effective is it? First, a brief review and evaluation of the various leak detection methods along with the in-pipe inspection systems provided. Then, a method for detecting leaks was used with the help of a robot inside a tube in two tube and knee geometries with leaks with different diameters and geometries. The degree of accuracy of pressure gradient accuracy in very small leaks is much higher than static pressure in the presence of leakage. The highest concentration of fluctuations in pressure contours, pressure gradient, turbulent kinetic energy and velocity were detected in the leak areas. Interestingly, the pressure drop across the pipe remains even if there is a linear leak, and the relationship between the volumetric flow rate of the leak output and the pipeline pressure is strong. In addition, by modeling the robot inpipe, it was observed that due to the emergence of pressure vortices around the body and arms, the best position is to install a pressure sensor in front of it. In addition, due to the leakage model, the in-pipe robot is not seen as an aggressive model such as leakage (creating gradients and high-pressure fluctuations) during fluid flow. It can be said that the fluid dynamics of numerical calculations is an efficient tool both in time and economically to investigate leak detection and fluid effects in the distribution network distribution network.
Keywords: Leakage - Pressure Sensor – Inpipe Robot - Computational Fluid Dynamics
