球形气垫式调压室水位和压力波动计算方法

为促进球形气垫式调压室的工程应用,通过介绍球形气垫式调压室水位和压力波动计算原理和方法,给出了水位和压力波动方程及具体求解步骤。结合工程实例,计算分析了气体状态方程多方指数对水位波动、气室压力的影响及引水系统的小波动稳定。结果表明,多方指数越大,水位波幅越小,气室压力波幅越大。球内控制水深越小,气室压力越大,气体体积越大,水位波动衰减率越大,小波动稳定性越好。研究成果可为球形气垫式调压室的应用和运行提供参考。

Calculation Method of Water-level and Pressure Fluctuation in Spherical Air Cushion Surge Tank

In order to promote spherical air cushion surge tank application, this paper introduces the calculation principle and method of water-level and pressure fluctuation in surge tank. The detail implementation steps are given and discussed. Numerical simulation of a practical engineering with a spherical air cushion surge tank is provided. The influence of polytropic index of gas state equation on water level fluctuation, air pressure and stability of diversion system in fluctuation within a narrow range are analyzed. Investigation results show that the greater polytropic index is, the smaller amplitude of water-level fluctuation is, the higher pressure of air in the tank is. Stability of diversion system is studied with this spherical air cushion surge tank. The depth of water in the tank affects the stability and small water depth is beneficial for reducing the amplitude of water-level fluctuation. These findings can be referenced to engineering application and design of the spherical air cushion surge tank.