挑坎水舌运动轨迹控导措施研究  

Measures of Controlling the Movement Locus of Nappe in Flip Bucket

作　　者：侯冬梅[1] 占桂泉 王才欢[1] 杜兰[1] 

机构地区：[1]长江科学院水力学研究所,武汉430010 [2]浙江省衢州市水利水电勘测设计有限公司,浙江衢州324002

出　　处：《长江科学院院报》2013年第3期16-20,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(51279013);水利部公益性行业科研专项(201101005);中央级公益性科研院所基本科研业务费专项项目(CKSF2013023/SL)

摘　　要：依托某工程泄洪洞出口消能工体型优化试验,对常规挑坎、平面扩散型和纵向扩散型消能工(窄缝挑坎)的挑坎水舌特性进行了对比研究,其中重点对窄缝挑坎消能工鼻坎体型对水舌运动轨迹、水舌形态、入水范围的控导作用进行了初步探讨。研究结果表明:通过侧墙非对称偏向、出口局部偏转等措施实现挑坎水舌运动方向的控导效果,适应下游河道边界特殊需要,较好地解决了工程消能难题,可为同类型工程提供参考,但鼻坎体型、尺寸等参数与水舌运动轨迹的定量关系仍有待进一步深入系统研究。To optimize the energy dissipation at the outlet of flood-discharge tunnel, characteristics of the nappes of common flip bucket and narrow-slot flip bucket（ including planar-diffusion and longitudinal diffusion energy dissipa- tor） were systematically investigated. The controlling and diverting effect of narrow-slot bucket type on the move- ment locus and pattern of nappe and the contact area of jet flow into water were discussed in emphasis. Results showed that problems of energy dissipation can be well addressed by asymmetric side-wall and partial deflection of the outlet to control and divert the nappe direction and subsequently adapt to the complex downstream channel boundary. The research could be a reference for similar projects, yet the quantitative relation between the nappe movement locus and the bucket type and size are to be studied in depth.

关 键 词：水力学 消能防冲 挑流消能 平面扩散挑坎 窄缝挑坎 水舌导向 

分 类 号：TV653.3[水利工程—水利水电工程]