摘要
针对深海采矿扬矿硬管内高速螺旋流输送过程中阻力损失无法精确计算的问题,利用计算流体力学软件FLUENT,采用欧拉双流体模型,计算得到扬矿硬管内高速螺旋流在不同工况条件下的阻力损失,并就其管道、物料和浆体特性等方面的影响因素进行分析。结果表明,不同工况条件下,阻力损失随提升速度、锰结核颗粒粒径、颗粒密度、浆体黏度、提升浓度的增大而增大,随管道内径和提升角速度的增大而减小。再采用能量理论,并利用MATLAB软件中的多元回归模型,推导出扬矿硬管内高速螺旋流输送的阻力损失无量纲公式,该公式能对深海采矿水力提升式扬矿硬管内高速螺旋流输送阻力损失进行理论预测,并且对实际工程应用具有一定的指导意义。
Based on the problem that resistance loss of transportation on high-speed spiral flow in lifting pipe cannot be calculated precisely, the high-speed spiral flow was numerically simulated by Eulerian two-fluid model in the FLUENT software, the resistance losses of transportation under different working conditions were obtained.A nd itsinfluential factors, such as pipe features, material properties and slurry characteristics were analyzed.The results of numerical simulation showed that resistance loss rose with the increase of lifting speed, particle size, particle density, slurry viscosity and manganese nodules concentration, but reduced with the increase of pipe diameter and angular velocity. According to energy theory, the dimensionless formula on resistance loss of trartsmission about high-speed spiral flow in the lifting pipe was deduced with the help of the multiple linear regression models in MATLAB software, the formula can provide theory prediction for resistance loss of transportation calculation on high-speed spiral flow in the deep-sea mining pipe, and has definite guiding significance for practical engineering applications.
出处
《机械设计与制造》
北大核心
2017年第2期153-156,共4页
Machinery Design & Manufacture
基金
国家青年自然基金资助项目(51104067)
关键词
螺旋流
欧拉模型
阻力损失
能量理论
公式推导
Spiral Flow
Eulerian Model
Resistance Loss
Energy Theory
Formula Derivation
