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| Transportation characteristics of piped carriage with different Reynolds numbers |
| Wang Rui,Sun Xihuan,Li Yongye |
| (College of Water Resource Science and Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China) |
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Abstract In order to solve the problems of the existing energy crisis caused by traditional means of transport,a piped hydraulic transportation technique of tube- contained raw material was put forward and an intelligence test system was designed to research the transportation characteristics of the piped carriage.Through dynamic analysis,the motional stages of the piped carriage were divided and the main power source of the motion of the piped carriage was indicated.With combination of theoretical analysis and model experiments,the transportation characteristics of the piped carriage with different Reynolds numbers were studied.The results show that the larger Reynolds number is,the larger the conveying speed of the piped carriage,the cyclical slit flowing rate and the water velocity in the pipe are,but their increase ranges are different.The conveying speed of the piped carriage increases the most,water velocity in the pipe and the cyclical slit flowing rate increases the least.When the speed of the piped carriage,the cyclical slit flowing rate and the water velocity in the pipe are equal,the piped carriage moves the most smoothly and steadily.Additionally,the conveying capacity of the piped carriage increases firstly and then decreases with the increasing of Reynolds number.While Reynolds number falls in about 160 000～210 000,the capacity reaches the maximum.Meanwhile,the motional mathematical model of the piped carriage was established with different Reynolds numbers according to the law of conservation of mass and a comparative analysis was done on its results and the experiment results.The maximum relative error is less than 9%.
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Received: 08 November 2010
Published: 30 July 2011
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