过渡状态下明渠水流紊动规律的模糊模型  

The Fuzzy Model of the Turbulent Law of Open Channels under the Transition State

作　　者：周银军[1] 刘焕芳[1] 蔡小超[1] 

机构地区：[1]石河子大学水利建筑工程学院,石河子832003

出　　处：《新疆农业大学学报》2006年第4期62-65,共4页Journal of Xinjiang Agricultural University

基　　金：教育部优秀青年教师资助计划项目(1862)

摘　　要：通过研究过渡状态下的水流紊动规律,层流、过渡状态、充分发展的紊流可以被认为是一发展、渐变、模糊的过程。基于此,通过引进模糊数学的隶属度,过渡状态的紊动规律可表述为程度的层流与程度的紊流的综合作用,导出了过渡状态下时均流速公式和阻力系数公式。并将其应用于明渠水流,理论结果与试验资料比较符合。The turbulent law of open channels has been studied under the transition state, the laminar flow, transition state and fully developed turbulence can be thought as a developing, graded and fuzzy process, on the basis of which, with introducing the degree of membership of fuzzy mathematics, the turbulent law under the transition state can be described as the comprehensive function of degree laminar flow and degree turbulence, and the velocity distribution formula and the resistant coefficient formula under the transition state are deduced. When the theories are applied for the open channels, theoretical results accord with experimental materials relatively.

关 键 词：层流 紊流 模糊 隶属度 

分 类 号：TV133[水利工程—水力学及河流动力学]