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Computational analysis of thermophysical and flow characteristics in a cylindrical gas cavern

机译：圆柱形气体洞室热物理和流动特性的计算分析

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This thesis describes a simulator for prediction of withdrawal operations from gas caverns. The simulator is a tool for planning, analysis and operation of underground gas storage facilities. The simulator is called VECTORS (Vertical Cavern Thermophysical OpeRations Simulator). Turbulent buoyancy flows in caverns are responsible for advection and redistribution of heat and water. These intrinsic properties of gas storage operations are mandatory for the simulation. This work seems to be the first to treat natural gas under high pressure in large caverns. The numerical model uses a control volume formulation in cylindrical coordinates, and includes time dependent terms. The time dependent gas conditions and the temperature field in the surrounding rock are computed by simultaneous solution of the non-linear and interlinked differential equations describing continuity of gas and water, momentum and energy of gas and energy of the surroundings. Phase transition of water is accounted for by means of two transport equations. There are correlations for net turbulent transport properties of energy, evaporated and liquid water and the wall heat transfer coefficient. These correlations were developed by means of the model used in a code called Kameleon-II. Verifications of VECTORS has been demonstrated by means of an adiabatic withdrawal case and operational data from two different underground storage locations. 59 refs., 75 figs., 22 tabs.

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