【摘要】 渗透系数是地下水水力学和岩土力学中的一个重要参数,渗透系数的大小与含水层骨架所承受的有效应力关系密切。含水层储能过程中回灌水的温度与背景温度不同,固体骨架温度变化产生的热应力将导致有效应力的变化。本文结合含水层储能过程的特点,通过实验和理论推导,着重研究了存在热应力作用时回灌过程中的有效应力对渗透系数的影响。研究表明,在温差较小的情况下,热应力对渗透系数影响很小。该结论对含水储能过程中的流动与传热特性研究有指导意义。更多还原

【Abstract】 Coefficient of permeability is an important parameter in hydraulics of groundwater and rocksoil mechanics. It is closely related to the effective stress of aquifer solid matrix. In the processes of aquifer thermal energy storage, the variation of temperature in solid matrix will bring about thermal stress and result in the change of effective stress. The paper studies the influence of effective stress on the coefficient of permeability under the action of thermal stress in recharging. Experimental and theoretic analysis proves that thermal stress hardly affects the coefficient of permeability under small temperature difference. This result is meaningful to the research on the properties of flow and heat transfer in the processes of aquifer thermal energy storage.更多还原