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小浪底工程采用了由导流洞改建而成的新型多级孔板消能泄洪洞。新洞型的采用 ,解决了重复利用导流洞所带来的高水头、高流速的复杂技术问题。在多次水力学模型试验研究的基础上 ,孔板消能泄洪洞设计逐步优化和完善 ,主要研究的方案依次为 :①小圆塔进口 ,洞内设 5级孔板 ;②龙抬头进口 ,洞内设 5级孔板 ,其中第 5级为偏心孔板 ;③龙抬头进口 ,洞内设 5级孔板 ,出口设溢流挡水堰 ;④龙抬头进口 ,洞内设 4级孔板 ,孔板后设中闸室 ;⑤龙抬头进口 ,洞内设 3级孔板 ,孔板后设中闸室。最终方案满足了消能和防空蚀的要求
Xiaolangdi project uses a diversion from diversion tunnel made of a new multi-stage orifice energy dissipation tunnel. The adoption of the new hole type solves the complicated technical problems of high head and high velocity caused by the diversion of the diversion tunnel. On the basis of several hydraulic model tests and researches, the design of energy dissipation tunnel for orifice plate is gradually optimized and perfected. The main research programs are as follows: (1) The small round tower is imported with 5-level orifice in the cave; (2) There are 5 holes in the hole, of which the 5th level is eccentric hole plate; ③ The dragon is imported from the top, 5 holes are set in the hole, the overflow weir is set at the exit; ④ The dragon head is imported, , After the plate set in the chamber; ⑤ dragon looked up imports, holes set up three holes, orifice plate set in the chamber. The final solution to meet the energy dissipation and anti-cavitation requirements