长江科学院院报
長江科學院院報
장강과학원원보
JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTITUTE
2015年
5期
66-71
,共6页
潜没式治河建筑物%潜坝%水流特性%冲刷%壅水
潛沒式治河建築物%潛壩%水流特性%遲刷%壅水
잠몰식치하건축물%잠패%수류특성%충쇄%옹수
submerged river regulation structures%submerged dike%flow characteristics%scour%backwater effect
针对潜没式治河建筑物(潜坝、潜没导板、潜没圆柱体、护滩带等)附近的复杂水流形态,结合国内外的研究成果,对其影响下的流速分布、剪应力分布、涡流结构、紊动动能、比尺效应、分离区、糙率和潜没度等进行了综述,讨论了其冲刷、壅水等机理。相关研究结果表明:潜没建筑物对水流的扰动程度决定了其水流特性,其诱导的漩涡及回流对水流结构产生巨大影响,增大了局部河床阻力,使得综合糙率重新分布。进而指出现有研究成果及其不足之处,并结合已有成果提出展望,为后续的工程及研究工作提供参考。
針對潛沒式治河建築物(潛壩、潛沒導闆、潛沒圓柱體、護灘帶等)附近的複雜水流形態,結閤國內外的研究成果,對其影響下的流速分佈、剪應力分佈、渦流結構、紊動動能、比呎效應、分離區、糙率和潛沒度等進行瞭綜述,討論瞭其遲刷、壅水等機理。相關研究結果錶明:潛沒建築物對水流的擾動程度決定瞭其水流特性,其誘導的漩渦及迴流對水流結構產生巨大影響,增大瞭跼部河床阻力,使得綜閤糙率重新分佈。進而指齣現有研究成果及其不足之處,併結閤已有成果提齣展望,為後續的工程及研究工作提供參攷。
침대잠몰식치하건축물(잠패、잠몰도판、잠몰원주체、호탄대등)부근적복잡수류형태,결합국내외적연구성과,대기영향하적류속분포、전응력분포、와류결구、문동동능、비척효응、분리구、조솔화잠몰도등진행료종술,토론료기충쇄、옹수등궤리。상관연구결과표명:잠몰건축물대수류적우동정도결정료기수류특성,기유도적선와급회류대수류결구산생거대영향,증대료국부하상조력,사득종합조솔중신분포。진이지출현유연구성과급기불족지처,병결합이유성과제출전망,위후속적공정급연구공작제공삼고。
On the basis of research achievements in China and abroad,we made a review on the complex flow char-acteristics (flow velocity,shear stress distribution,eddy flow structure,turbulent kinetic energy,scale effect,sep-aration zone,roughness coefficient and immersion ratio)near submerged river improvement structures (submerged groyne(dikes),vanes,cylindrical and beach-protection belt).We also discussed the mechanism of scouring and backwater effects.Research results indicate that the flow characteristics are determined by the disturbance of these submerged structures to flow.The induced eddy flow and backwater greatly affect the flow structure,increase local bed resistance,and redistribute the comprehensive roughness coefficient.Finally we present the shortcomings of the achievements and put forward prospects to future research.