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建立抽/灌井群地下水热运移实验系统,开展抽/灌过程含水层温度场与地下水渗流场演化规律研究,特别对有、无初始自然流的水平流、垂直交叉流和静态流的影响作用进行系统研究。结果表明,地下水初始自然流的方向和流速对含水层温度场的影响范围和程度起着关键作用,表现出自然流与抽/灌渗流交互的影响。当自然水平流与抽/灌渗流流向相反时,流速越大,抽水温度受到回灌水温度影响的推迟性越大,延迟热贯通时间和减轻热交互程度。相反,流向相同时,将加剧热贯通和热交互影响。对于垂直交叉流态,流速越大,地下水渗流场及其温度场影响范围偏移程度越大,通常减轻热贯通和热交互影响。
The experimental system of groundwater heat transfer in pumping / injection well group is established to study the evolution law of aquifer temperature field and groundwater seepage field during pumping / filling process, especially on horizontal flow, vertical flow and static flow with and without initial natural flow The role of systematic research. The results show that the direction and velocity of the initial natural flow of groundwater play a key role in the extent and extent of the influence of the temperature field in the aquifer and show the interaction between the natural flow and the pumping / infiltration flow. When the natural horizontal flow and the pumping / infiltration flow flow in the opposite direction, the greater the flow rate, the greater the delay of the pumping temperature affected by the recharge water temperature, and the delay of the heat penetration time and the reduction of the heat interaction. Conversely, the same flow direction will exacerbate the effects of thermal penetration and thermal interactions. For vertical cross-flow regimes, the greater the velocity of flow, the greater the range of influence of groundwater seepage field and its temperature field, and generally reduce the influence of heat penetration and heat interaction.