Rhee Dong Sop, Park Yong Sung, Park Inhwan
Korea Institute of Construction Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do, 10223, Republic of Korea.
School of Science & Engineering, University of Dundee, Dundee DD1 4HN, UK.
Water Sci Technol. 2018 Nov;78(5-6):1287-1295. doi: 10.2166/wst.2018.397.
Laboratory experiments were conducted to assess the performance of a vortex drop inlet with a spiral intake in subcritical and supercritical flow conditions. The water surface elevation at multiple locations was measured for different flowrates by varying the extent of the guiding wall and the longitudinal and radial bottom slopes. The measurements show that a steeper longitudinal bottom slope decreases the water surface elevation at the beginning of the intake, resulting in a transcritical flow in the intake structure. However, a steeper longitudinal bottom slope also causes the maximum water surface elevation to occur within the spiral intake. For an effective vortex drop inlet design, achieving a low water surface elevation throughout the entire spiral intake structure is required. Experimental results show that the two seemingly conflicting design criteria, namely, achieving a low water surface elevation in the approach channel and reducing the maximum water surface elevation in the intake structure, can be simultaneously achieved by adding a radial bottom slope.
进行了实验室实验，以评估具有螺旋进水口的涡流式跌水进水口在亚临界和超临界水流条件下的性能。通过改变导流壁的范围以及纵向和径向底部坡度，针对不同流量测量了多个位置的水面高程。测量结果表明，较陡的纵向底部坡度会降低进水口起始处的水面高程，从而导致进水口结构内出现临界流。然而，较陡的纵向底部坡度也会使最大水面高程出现在螺旋进水口内。对于有效的涡流式跌水进水口设计，需要在整个螺旋进水口结构中实现较低的水面高程。实验结果表明，通过增加径向底部坡度，可以同时实现两个看似相互矛盾的设计标准，即在引渠中实现较低的水面高程以及降低进水口结构中的最大水面高程。
