某低水头大流量长引水式电站调压室设计

Design of surge chamber for a long diversion type station with low head and large discharge

调压室的设置是减小水锤压力在水道中传递的有效方法之一,而调压室断面的大小则受托马稳定条件的制约。按托马稳定断面公式计算的低水头大流量长引水式电站稳定断面往往较大。结合某工程实际运行情况,考虑了电力系统的影响,论证了调压室断面减小的可能性,并拟定了适合该工程的调压室体形,最后通过过渡过程仿真计算论证了所采用调压室体形的合理性。

The surge chamber is an effective way to reduce the transmission of water hammer pressure in a water conduit,but the size of the surge chamber section is restricted by Thomas stability conditions.According to the calculation by Thomas stable cross-section formula,the stable section is often larger for a long diversion type hydropower station with low head and large discharge.Based on the real operation of a certain project and considering the effect of the power system,the possibility of reducing the cross section of the surge chamber is verified,and a proper outline shape is designed for the surge chamber of the project.Through simulation calculation of the transition process,the rationality of the adopted shape of the surge chamber is justified.