【摘要】 通过水工模型试验研究，对三峡工程泄洪深孔采用突扩跌坎式掺气，比较了明槽坡度、挑坎高度、侧向折流器型式、出口反弧半径，以及通气孔型式和位置等因素，以优化掺气设施，保证在施工导流期及正常运行期各级库水位下（１３５～１７５ｍ）均能形成稳定空腔，达到掺气减蚀的目的。同时，对此体型设计的一般规律和空腔长度计算方法进行了探讨。更多还原

【Abstract】 An aerator with vertical drop and lateral sudden enlargement form is tested in laboratory for the Three Gorges Projects (TGP) outlets. The factors affecting aeration, including the gradient of the open chute, height of drop, type of lateral deflector, radius of bucket, shape and position of ventilation vents etc., are optimized separately after comparison between various alternatves. As a result of series tests, the purpose of eliminating cavitation by air entraiment and forming a steady cavity beneath the jet flow under all the upper water level (135￣175 m)conditions is achieved. Meantime, the general rule of the configuration design and the calculation procedure for cavity length are inquired.更多还原