适宜大流量小底坡掺气设施的翼型挑坎研究

Airfoil Flip Bucket for Aeration Devices with High Flow and Small Slope

大流量小坡度泄洪洞布置的掺气减蚀设施,往往存在空腔偏短及空腔回水等问题。根据大流量小底坡泄洪洞掺气设施已有的研究和应用成果,提出了翼型挑坎的掺气设施布置,以求解决上述问题。针对涔天河水库扩建工程1#泄洪洞,开展了水工模型试验研究,比较了不同翼型挑坎布置型式对掺气设施水力特性的影响,论证了翼型挑坎对于减轻掺气设施空腔回水的有效性。通过水工模型试验研究,确定了翼型挑坎掺气设施的基本布置型式,为进一步开展研究和推广应用奠定了基础。

Problems such as cavity backwater and short dimension are usually found in the aeration devices ol spill-way tunnel with high flow and small slope gradient. In this paper,an airfoil flip bucket was put forward according to existing research result and practical application aiming to solve the above problems. With the physical model test on spillway tunnel 1# in the expansion project of Centianhe reservoir as a case study,the effects of different configurations of airfoil flip bucket on the hydraulic characteristics of aeration devices were compared,and the effectiveness of airfoil flip bucket in relieving cavity backwater of aeration devices was also demonstrated, and the basic layout pattern was eventually determined by the physical model test. This study lays a foundation for further research and popularization.