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气垫式调压室被越来越多的水电站及泵站系统所采用，因此，研究气垫式调压室对水击波的反射程度是很有必要的。文中根据气垫式调压室的实际边界条件，利用水击基本方程，详细推演了水击波透过调压室底部进入低压引水隧洞的穿室系数，得到了计算穿室系数的理论公式。
Air-cushion surge chamber is used by more and more hydropower stations and pump stations. Therefore, it is necessary to study the degree of reflection of air surge in air-cushion surge chamber. According to the actual boundary conditions of air cushion surge chamber, the basic equations of water hammer are used to derive the chamber coefficient of water shock wave entering the low pressure diversion tunnel through the bottom of the surge chamber. The theoretical formula for calculating the chamber coefficient is obtained.