【摘 要】
：
To better understand the flow patterns near Jiuling Hill in the approach navigation channel of the Three Gorges Project and to improve the navigation channel, a
【机 构】
：
College of Water Conservancy & Civil Engineering,Dept.of Hydraulic Engineering
【基金项目】
：
中国博士后科学基金;国家三峡库区滑坡与塌岸防治科研专项基金
论文部分内容阅读
To better understand the flow patterns near Jiuling Hill in the approach navigation channel of the Three Gorges Project and to improve the navigation channel, a physical flume model was constructed with a non-submerged spur dike placed as a barrier. An approach of sucking a small amount of water from the upper flume at the convex side of the spur dike and spouting it out again into the lower flume at the downstream side of the spur dike, so-called "sucking-spouting" water method, was proposed to improve navigational conditions. The flows around the spur dike for this method are experimentally investigated, and are compared to those in the no "sucking-spouting"water case. Based on the rigid lid assumption and a Dynamic Smagorinsky Model, all the vortex flows around the spur dike are numerically simulated, and the data are analyzed systematically. By applying "sucking-spouting" method, the recirculation zone caused by the spur dike reduced greatly and the transverse velocity decreased. At the same time, the flow behind the spur dike is much more complex, and materials and momentum substantially exchange between the dead zone and the main flow because of spouting action. The finite volume method is used to discretize the governing equations together with a staggered grid system, where the second-order difference is applied for the diffusion terms and the source terms while the upwind difference QUICK is used for the convection terms. The computational results are in fairly good agreement with the experimental data.
其他文献
A comprehensive hot wire investigation of the flow around a circular cylinder is carried out in an 18" × 18" wind tunnel to look into the dominant frequencies
In this paper, characteristics of precipitating clouds in a thermal convective system (TCS) occurred in the southeastern mainland of China at 15:00 BT (Beijing
The vortex self-organization is investigated in this paper by four groups of numerical experiments within the framework of quasi-geostrophic model, and based on
Objective: To explore the growth inhibition effects and apoptosis inducing mechanisms of curcumin on human ovarian cancer cell line A2780. Methods: After treatm
The main aim of this study is to understand the dynamic behavior of a cable-stayed bridge,using both numerical and experimental analysis. A three-dimensionai fi
In this paper we introduce a new reverse Loop subdivision method. In contrast to current wavelets based Loop subdivision scheme, our method applies the same rul
A bulk metal/ceramic composite material with a honeycomb-like micro-cell structure has been prepared by sintering the spherical Al90Mn9Ce1 alloy powders clad by
With high association constants in nonpolar solvents, the quadruple hydrogen bonding arrays of 2-ureido-4[1H]-pyrimidinones are recently considered to be one of
The compound of tetraacetyldibenzylhexaazaisowurtzitane (TADBIW) is the precursor of synthesizing the high energy density caged compound hexanitrohexaazaisowurt
A novel process for fabricating coal-tar pitch derived carbon foam was introduced. The coal-tar based mesophase pitch was characterized by Infrared Spectrum and