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由于调压室涌浪和水击压力受连接管尺寸影响较大,针对水库—调压室—阀门引水系统,推导了计入连接管长度与直径情况下阀门瞬间关闭时调压室波动的解析公式,利用特征线法计入斜坡项进行数值计算,验证了公式推导结果,并分析了不同连接管长度和直径下调压室水位波动幅值、周期和阀门端水击压力上升值的变化规律。对比分析结果表明,在管径较小时调压室涌浪相对值随连接管长度变化较快;连接管长一定时,阀门端水击压力在某一管径比下上升较快,应加以重视。
Because surge and water hammer pressure in surge chamber are greatly affected by the size of connecting pipe, aiming at the reservoir-surge chamber-valve water diversion system, the analysis of fluctuation of surge chamber when the valve is closed instantaneously under the condition of connecting pipe length and diameter is deduced Formula, using the characteristic line method into the slope term for numerical calculation to verify the formula to derive the results, and analyzes the different length and diameter of the connecting pipe under the pressure regulating chamber water level fluctuation amplitude, cycle and valve side of the water hammer pressure rise value changes . The results of comparative analysis show that when the pipe diameter is small, the relative value of the surge in the surge chamber changes rapidly with the length of the connecting pipe. When the connecting pipe length is fixed, the water hammer pressure on the valve side rises rapidly at a certain pipe diameter ratio, which should be paid attention to .