分散通气式掺气设施  

Scattered Vent Aerators

作　　者：戴晓兵 李延农 

机构地区：[1]水能资源利用关键技术湖南省重点实验室,湖南长沙410014 [2]中国水电顾问集团中南勘测设计研究院有限公司,湖南长沙410014

出　　处：《水力发电》2013年第11期66-68,共3页Water Power

摘　　要：针对目前掺气设施体形存在的一些不足,提出了分散通气式掺气坎和分散通气式侧壁掺气槽。分散通气式掺气坎具有多根独立的分散通气管道,分散通气管道沿掺气坎横向分布,通气方式由传统掺气设施的侧面底部集中通气方式转变为掺气设施内部的分散通气方式,卷吸的空气沿掺气坎横向分布,使得水舌能够均匀掺气;可最大限度地满足通气量的要求;且对掺气坎的垂直高度基本无要求,可以有效地减小掺气坎挑角,使掺气水舌与泄槽底板的冲击角最小,从而降低空腔回水的风险。分散通气式侧壁掺气槽是将分散通气管道应用于侧壁掺气,从而构成一种外部开敞式通气与内部分散式通气相结合的侧壁掺气设施,适合于高速水流泄水建筑物的侧壁掺气。For eliminating the shortcomings of existing aerators, the new-style scattered vent aerator and scattered vent sidewall aerator are proposed to be used in hydraulic structure. The scattered vent aerator with multiple-strand independent scattered vent pipes transversely distributed along the aerator turns the traditional lateral-bottom concentric venting way to the scattered venting which makes the entrainment air transversely distribute along the aerator and makes the nappe being aerated uniformly. The scattered vent aerator can satisfy the requirements of ventilating volume, and is independent of the vertical height of the aerator which can reduce the oriented angle of aerator effectively and minimize the impact angle between nappe and chute base slab to reduce the risk of cavity backwater. The scattered vent sidewall aerator arranges scattered vent pipe in sidewall of structure to form a new sidewall aerator which combining outside open air ventilation and internal scattered ventilation together. The scattered vent sidewall aerator is suitable for the sidewall aeration of high-speed water discharge structure.

关 键 词：分散通气管道 分散通气式掺气坎 分散通气式侧壁掺气槽 

分 类 号：TV131.34[水利工程—水力学及河流动力学]