输水洞径对调压室最佳位置的影响

鉴于在输水管道上移动调压室位置可使涌浪压力与水锤压力彼此相互消长,当两者相等即对应了调压室最佳位置。以原输水洞径不变对应的最佳位置为前提,采用电站水力过渡过程的数学模型,模拟研究了引水隧洞及压力管道直径的改变对调压室最佳位置的影响。结果表明,随着引水隧洞直径的减小,调压室需左移远离厂房以恢复到最佳位置,且移动前后蜗壳末端压力差值呈增长趋势,但变幅较小;而随着压力管道直径的减小,调压室需右移靠近厂房以恢复平衡,且压力差值较前者更为明显。

Impact of Water Delivery Pipeline Diameter on Optimal Position of Surge Chamber

Moving the surge chamber position in the water delivery pipeline, the surge pressure and the water hammer pressure mutually rises and declines. When they are equal it corresponds to the optimal position of surge chamber. With the premise of the optimal position under the primary water delivery pipeline, we study the impact of diameter change of the diversion tunnel and pressure pipe on the optimal position of surge chamber using the mathematical model of transient process. The results show that with reducing the diameter of the diversion tunnel, the surge chamber should be moved to the left of powerhouse to recover the optimal position. The difference of the spiral case pressure between the original location and the moved location is a growing trend, but the variation range is small. With the reducing of the pressure pipe diameter, we need to move the surge chamber to the right near the powerhouse to restore balance, and the pressure difference is more obvious than the former.