摘要
动床模型试验中,在满足相似性条件基础上,仍可能会出现轻质沙沙波一定程度的异常发育现象,这一偏差将影响阻力相似及水流、泥沙运动状态。为寻求扼制轻质沙沙波异常发育的有效途径,借助水槽试验,通过控制变量法分析不同水流条件、不同粒径、不同密度条件下轻质沙沙波形态变化。研究表明:在本试验水流条件下(Fr=0.10~0.32,U/Uc=0.8~2.5),利用U/Uc可更全面地表达其与轻质沙沙波形态的变化关系;在合理范围内增大轻质沙粒径及密度,可使相对波高及波长粒径比减小;基于詹义正公式,建立本试验条件下轻质沙沙波Δ/h与U/Uc的拟合公式。
In the moving bed model test,there may still be some abnormal development of particles of light matirial waves on the basis of meeting the similarity conditions,which affects the resistance similarity and the state of flow and sediment movement. In order to find an effective way to control the abnormal development of particles of light matirial waves,the change of particles of light matirial waves shape under different flow conditions,different particle sizes and different density is analyzed by means of flume test and control variable method. The results show that: under the condition of flow( Fr = 0. 10 ~ 0. 32,U/Uc= 0. 8 ~ 2. 5),the relationship between U/Ucand the shape of particles of light matirial waves can be expressed more comprehensively by using U/Uc;increasing the size and density of particles of light matirial in a reasonable range can reduce the relative wave height and the ratio of wave length to particle size;based on the Mr. zhan’ s formula,the fitting formula of particles of light matirial waves can be established under the condition of this test between Δ/h and U/Uc.
作者
王晓旭
高清洋
徐俊锋
WANG Xiao-xu;GAO Qing-yang;XU Jun-feng(Tianjin Survey and Design Institute for Water Transport Engineering,Tianjin 300456,China;Tianjin Port Engineering Design&Consulting Co.,Ltd.of First Harbor Engineering Co.,Ltd.,Tianjin 300461,China;Tianjin Research Institute for Water Transport Engineering,Ministry of Transport,Tianjin 300456,China)
出处
《水运工程》
北大核心
2020年第9期33-39,共7页
Port & Waterway Engineering
关键词
轻质沙
沙波
波高
波长
particles of light matirial
sand wave
wave height
wave length
