Discussion of Muddy Surface Settling of Xiaolangdi Reservoir

Abstract:

Sediment settling velocity is an important parameter in particle suspension and indispensable link of hyperconcentrated flow as well as basic theory support for efficient sediment transport of Xiaolangdi Reservoir. This paper has adopted current sediment sample in Xiaolangdi Reservoir to take still water settling experiment, observed carefully silt sediment distribution during different settling duration under various initial concentrations, analyzed common settling velocity calculation method, and adopted settling duration curve method as calculation method to obtain a constant settling velocity of free settling section. Typical settling velocity that is obtained from experiments makes supplement and fitness to settling velocity formula of the existing groups of sediment sample, amends the formula coefficient, further explore the settling characteristics and settling velocity of fine particle mixed viscous sediment with water concentration change, and meanwhile this paper researched settling distance impact on settling velocity, existing sediment group settling transition to mesh settling critical transition silt concentration of Xiaolangdi Reservoir.

• Periodical: Applied Mechanics and Materials (Volumes 641-642)
• Pages: 267-270
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.641-642.267
• Online since: September 2014
• Authors: Si Qi Jiang*, Jun Hua Zhang, Guo Ming Gao, Hong Wei Wang, Tao Li
• Keywords: Critical Silt Concentration, Mixed Sediment, Muddy Surface, Settling Duration Curve Method, Settling Velocity

References

[1] Jin Tonggui, Precipitation Separation [M]. Xian University of Architecture and Technology, 1999. 9, In Chinese.

[2] Zhang Shude, Research on Sediment Settling of Yellow River and Particle Dispersion Characteristics [D]. Postgraduate Paper of Xian University of Architecture and Technology, (2002).

[3] Qian Ning. Hyperconcentrated Flow Motion [M]. Tsinghua University Press, 1989, p: 38-65, In Chinese.

[4] Fei Xiangjun. Transportation Hydraulics of Slurry and Grainy Material [M]. Tsinghua University Press, 1994, p: 44-48, In Chinese.

[5] Han Qiwei. Reservoir Sedimentation [M]. Science Press, 2003. 8, In Chinese.

[6] Jiang Naiqian. Experimental Research on Ball Deposition in Turbulent Muddy Water [D]. Hydraulic Scientific Research Institute of Yellow River, 1989, In Chinese.

[7] Yang Meiqing. Flocculated Micro-Structure and Influence on Flocculated Structure of Flocculation [R]. Research Report of Sediment Research Institute of Department of Water Conservancy of Tsinghua University, 1986, In Chinese.

[8] Tang Maoguan and Tan Guangming. Some Analysis, Comparison, and Remark on Turbulence Measure-ments, Flow Modeling and Turbulence Measurements, Hemisphere Publishing Corporation, 1991, In Chinese.

[9] Qian Ning, Wan Zhaohui. Sediment Transport Mechanics [M]. Science Press, 1982, p: 382-385, In Chinese.

[10] Lee, S, L. ，Durst, F. On the motion of particles in turbulent duct flows. lnt.J. Multi-phase Flow No. 8, 1982, p: 125-146, In Chinese.

[11] Tsuji,Y. ，Morikawa,Y. LDV measurements of an airsolid two-phase flow in a horizontal pipe.J. Fluid Mechanics 120, 1982, p: 385-409, In Chinese.

DOI: 10.1017/s002211208200281x