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多级孔板消能泄洪洞是在小浪底水利枢纽工程设计过程中提出的一种全新的消能工，鉴于国内外大型工程中尚无实践经验，经批准在碧口水电厂排沙洞内进行孔板消能的原型试验，任务主要是了解孔板的消能特性、水流空化及脉动情况、振动情况、孔板孔缘的保护措施和施工经验。试验取得了圆满成功，为多级孔板消能泄洪洞的设计积累了丰富的经验，也为小浪底工程将导流洞改建为永久孔板泄洪洞打下了坚实的基础。
Multi-level orifice energy dissipation spillway is a new energy dissipater proposed in the design of Xiaolangdi Multipurpose Dam Project. In view of the lack of practical experience in large-scale projects both at home and abroad, Prototype plate energy dissipation test, the task is to understand the orifice energy dissipation characteristics, water flow cavitation and pulsation, vibration, orifice plate edge protection measures and construction experience. The experiment was a success. It has accumulated rich experience in the design of multi-level orifice energy dissipation spillway tunnel and laid a solid foundation for the conversion of the diversion tunnel into a permanent orifice flood discharge tunnel in Xiaolangdi Project.