预测气垫式调压室运行中漏气量的数学模型

针对气垫式调压室运行过程中气压室内的气体沿单裂缝向黏土夹层渗漏的水-气二相渗流过程，建立了基于多相流理论的水-气二相流模型。模拟了不同的围岩孔隙水压力与调压室内气压力比值情况下的气压室漏气情况，结果表明，当该比值增大时，漏气量将迅速减少，验证了设置水幕防漏措施的有效性。所建立的水-气二相流模型可以充分考虑调压室地质条件，水幕的压力，气室气压及围岩性质等因素的影响，为空气损失评估、水幕设计及对漏气严重的调压室进行修补提供了依据。

Numerical model for predicting the air losses in the operation process of air cushioned surge chamber

The water-air two-phase flow model based on multi-phase flow theory for describing the leakage of air flowing into the clay interlayer via a fracture in the operation process of air-cushioned surge chamber is established. The amounts of air losses for different ratios of pore water pressure in rock mass to compressed air pressure in surge chamber are calculated. It is found that the air losses decrease quickly when the ratio increases, which indicates that the water curtain for preventing the air leakage is effective. In consideration of the effect of geological conditions, the pressure of water curtain, air pressure in surge chamber and properties of rock mass are taken into account. The proposed two-phase flow model can be used to assess the air losses, design of water curtain and provides the basis for remediation of the leakage of air-cushioned surgechamber.