Study On Leakage And Diffusion Characteristics Of Underwater Gas Pipeline

In recent years,with the intensification of environmental pollution and the overexploitation of coal and petroleum,natural gas,as an efficient,clean and low-carbon energy,has gradually become the main direction of the world's energy development.The rapid development of natural gas needs the support of gas pipeline construction.Inevitably,water environment will be encountered in the process of pipeline construction.The working environment of pipelines in water bodies is more complex,and the risk of operation is greater and the failure rate is higher.The accident of underwater gas pipeline will have an impact on the water environment.Serious conditions will also lead to property losses and casualties.Many experts and scholars have studied the characteristics of underwater gas leakage.In the present research,most of the research results are theoretical and simulated,and many hypothesis conditions have been set up in the process of research.In this paper,two methods of numerical simulation and experiment are used to study the leakage characteristics of an underwater gas pipeline.The experimental scheme of numerical simulation is carried out at the same size.First of all,the experimental method is used to study the leakage characteristics of an underwater gas pipeline.The experimental device was modified on the basis of the existing design,in order to make the experiment more close to the actual situation.By changing the different experimental conditions(in tube pressure,water depth,leakage aperture)to observe the change of the plume shape,and then find out the influence of the parameters on the characteristics of the bubble plume,and get the law of the velocity,the plume angle and the plume rising time on the axis of the plume,and have a basic cognition for the characteristics of the plume after the leakage.Secondly,the leakage behavior is studied by numerical simulation.The numerical model was innovating,and a model combining the pipeline domain with the water area was established.By comparing the simulation study of the experiment,it is found that the error is very small,so as to verify the accuracy of the simulation research.The results of the simulation are further analyzed to obtain a formula applicable to a specific range related to the above parameters.Through simulation and experiment,the leakage and diffusion characteristics of gas pipeline are analyzed and studied systematically,and the relevant conclusions are obtained,which is of reference value for future research and practical production.