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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 3    June 2002

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Water hammer in coarse-grained solid-liquid
flows in hydraulic hoisting for ocean mining
HAN Wen-liang(韩文亮)1, WANG Guang-qian(王光谦)1,
 WU Bao-sheng(吴保生)1, LIU Shao-jun(刘少军)2,
 ZOU Wei-sheng(邹伟生)3

1. Department of Hydraulic Engineering, Tsinghua University,
Beijing 100084, China; 
2. College of Mechanical and Electrical Engineering,
Central South University,Changsha 410083, China;
3. Changsha Research Institute of Mining and Metallurgy,
Changsha 410012, China

Abstract:The particles of polymetallic nodules in hydraulic hoisting flows that are used for mining in deep sea are rather coarse, therefore their flow velocity is smaller than that of the surrounding water. The characteristic s of solid-liquid flows such as their density, concentration, elastic modulus a n d resistance were discussed. The wave propagation speed and the continuity and momentum equations of water hammer in coarse-grained solid-liquid flows were theoretically derived, and a water hammer model for such flows was developed.

 

Key words: hydraulic hoisting; coarse grain; water hammer; numerical model

ISSN 1672-7029
CN 43-1423/U

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