摘要
利用淮河干流正阳关至淮南田家庵段河工模型和该河段1991年实测洪水资料作为试验条件,采用真实的入出流边界条件,未作任何假定与简化,对河工模型时间变态问题开展了系列试验研究。采用自行研制的大型河工模型自动检测与控制系统,对模型入流、尾水、口门等内外边界进行自动控制,对沿程水位、流速和出口流量等水力参数进行自动检测,获得了不同时间变态率条件下这些基本参数的过程变化。根据实测资料,对时间变态引起的沿程水位、比降、流速、水流挟沙力等参数的偏离趋势进行了分析,对引起这些物理量偏离的内在原因进行了探讨。
A series of model experiments for different time distortion rates are made in the Huaihe River model of the reach from Zhengyangguan to Huainan（Tianjiaan）. The hydrographic data of 1991 in the reach are used as model inflow and outflow hydraulic boundary conditions without any hypothesis and simplification. By means of large scale river model automatic measuring and controlling system, the input information, such as the inflow, tail water level, breaking dikes, etc, is automatically controlled, and the hydraulic parameters, such as water level, cross-sectional velocity along the model, outlet flow discharge, etc, are automatically measured. The variation processes of these hydraulic parameters with time for different time distortion rates are obtained. The deviation tendency of these hydraulic parameters is analyzed, and the reasons causing these deviations are discussed.
出处
《泥沙研究》
CSCD
北大核心
2006年第2期22-28,共7页
Journal of Sediment Research
关键词
河工模型
时间变态
水位偏离
流速偏离
挟沙力偏离
river model tests
time distortion
water level deviation
velocity deviation
sediment-carrying capacity deviation
