ADDITIONAL PRESSURE LOSSES OF SOLID-LIQUID FLOW IN AN OSCILLATING PIPELINE

作     者：Xia, Jian-Xin Huang, Jia-Zhen 

作者机构：Cent. of Environ. Sci. Peking Univ. Beijing 100871 China 

出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)

年 卷 期：2002年第14卷第1期

页      面：75-80页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：Project Supported by the National Natural Science Foundation of China. (Grant No: 49625101) 

主　　题：Two phase flow Underwater mineral resources 

摘      要：Manganese nodules on the ocean bed become attractive mineral resources because of its huge commercial benefits. In the last decades, a set of hydraulic lifting system with pipeline has been developed to mining these particles. It is inevitable that lifting pipe will oscillate due to its operation and the motion properties of the solid in the two-phase flow will be changed because of the oscillating of pipe-line. The pressure gradient along the lifting pipeline was investigated with a series of experiments. At the same time, a new pressure drop prediction method on the basis of Lagrange simulation technique was worked out by use of an axial momentum balance and this method provides a way to predict the pressure loss of solid-liquid mixture. The results show that compared with the fixed pipe transportation, the pressure gradient of the oscillating pipe is greater than that of the fixed pipe because of the collision and unsteady friction between particles and the pipe wall due to the oscillating motion of the pipe. Moreover, it is found that the prediction results are in good agreement with those of the experiments.