期刊论文

Numerical Simulation and Experimental Study of Negative Pressure Suction System for Camellia Particles Based on CFD-DEM

中文

农机化研究

1003-188X

2021

43

08

192-197

10.3969/j.issn.1003-188X.2021.08.035

湖南省重点领域研发计划项目（2019NK2022）； 中南林业科技大学博士科研经费项目（11180517）;中南林业科技大学研究生科技创新项目（20180345）；

本校为第一机构

针对研发的负压吸附系统在对油茶果进行气力收集时有阻塞及能耗高等问题,从输送管道的管径、弯径比及输送气速3个方面对系统收集性能进行研究,开展管道内油茶果气固两相流的数值模拟。数值模拟通过离散元素法（DEM）和计算流体力学（CFD）耦合求解,组成离散元模型与计算流体力学模型,以CFD求解连续气相流场,以DEM求解离散颗粒运动及受力。仿真结果表明:对吸附性能的影响因素从大到小为管径、输送气速、弯径比,在输送气速为38m/s、弯径比为1及管径为80mm时,系统质量流量达到最优。同时,对此参数下管道内不同阶段颗粒平均动能及不同位置处颗粒速度进行分析,并进行了样机吸附性正交试验,结果表明:管...

For the problems of obstruction and energy consumption when the negative pressure suction system that developed by our group was used for pneumatic collection of camellia particles, this paper studied the collection performance of the system from three aspects of pipe diameter, ratio of curvature and diameter and conveying gas velocity, numerical simulation of gas-solid two-phase flow of camellia particles in the pipeline was carried out. Numerical simulation was conducted by coupling solution of discrete element method(DEM) and computational fluid dynamics(CFD) to form a discrete element mode...