明渠自掺气水流发展区流速分布的试验研究  

Experimental Investigation on Velocity Distribution of Self-aerated Flows in Development Areas

作　　者：赵学问 徐钢[2] 杨伟[3] 

机构地区：[1]广东省航道勘测设计研究院有限公司,广东广州510115 [2]四川华能康定水电有限责任公司,四川成都610041 [3]广西电力工业勘察设计研究院,广西南宁530023

出　　处：《企业科技与发展（下半月）》2009年第1期4-6,共3页

摘　　要：对掺气发展区流速分布的试验研究发现,将水深和流速无因次化后,该区域水流断面流速分布形态保持极高的相似性,最大断面流速对应水深沿程保持恒定,本次试验中最大流速都保持在无因次水深约为0.6处。同时发现,采用合适的常数,断面最大流速以下的流速分布可以与指数公式计算值吻合较好,即仍满足指数分布公式,而最大流速以上的流速分布亦可用修改的指数公式描述。The findings of this experimental investigation on velocity distribution of self-aerated flow show that velocity distribution of section flow in this area, after zero dimension of depth and velocity, is highly similar. The maximum section velocity to water depth remains constant. The max-velocity in this test keeps standing at 0.6 of non-dimensional water depth. The findings also point out that if a proper constant is used, distribution of the maximum section velocity below can nicely fit the figure of exponential formula, that is, it still fits exponential distribution formula; distribution of the maximum section velocity above also can be described by modified exponential formula.

关 键 词：明渠水流 自掺气 流速分布 

分 类 号：U449.81[建筑科学—桥梁与隧道工程]