Open AccessDeveloping physical and mathematical models of the water-air mode of gravity drainage network
Author(s) -
Владимир Орлов,
Sergey Zotkin
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1015/1/012071
Subject(s) - pipeline (software) , airflow , heat exchanger , environmental science , mass transfer , drainage , flow (mathematics) , mechanics , petroleum engineering , meteorology , engineering , mechanical engineering , physics , ecology , biology
A physical and mathematical model of the water-air mode of free-flow drainage pipelines has been developed. The solution to the problem of physical modelling of pipeline network functioning is based on the study of the dynamics of changes in the hydraulic and aerodynamic parameters of the system, taking into account the phenomena of heat and mass transfer between liquid and air in the vaulted space of a free-flow pipeline. An algorithm for solving the problem is compiled on the basis of the criteria of hydrodynamic similarity, describing the phenomena of mass transfer as a result of forced air convection by using a mechanical ventilation system above the water surface. Based on the results of applying a special computer-aided calculation program, indicators of the required air exchange rate for effective removal of evaporation (steam) from the vaulted space of a pipeline were determined. As a result of solving the complex problem of studying the water-air mode of free-flow pipeline functioning, the authors compared and analysed the calculated values of the intensity of air exchange produced to remove steam, and to reduce harmful foul-smelling gaseous substances to reach the values of maximum permissible concentrations. The research results are aimed at preventing emissions of gases harmful to human health into the atmospheric air by constructive methods.