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Position: Home > Articles > Numerical Simulation on Inner Flow Field of 9R-40 Rubbing and Breaking Machine Based on Sliding Meshes Journal of Agricultural Mechanization Research 2016 (12) 1-6+11

基于滑移网格技术的揉碎机内流场研究

作  者：
麻乾;刘飞;赵满全
单  位：
内蒙古农业大学机电工程学院
关键词：
揉碎机;流场分析;瞬态仿真;滑移网格;非定常流
摘  要：
为研究揉碎机揉碎腔内的流场结构和流动状态,运用计算流体力学方法,基于滑移网格技术,对揉碎机空载时腔内的湍流非定常流场进行了三维瞬态数值模拟,得到了转速为2 800r/min时,揉碎机转子转动1周时间内,揉碎室和抛送室的流场空气动力学特性参数随时间变化规律,准确地反映了瞬态流场结构信息。结果表明:低压区在抛送室中半径为0~20mm附近,最高压力区在抛送叶片与内壁间隙,容易形成回流造成物料排出不易;启动阶段最大速度发生在出料口内侧尖角区域;轴向压力速度分布过于均匀,进而影响整机效率。此研究为揉碎机内部流场结构优化提供了新方法,提出了改进该机型的方向,为优化该机效率奠定了理论基础。
译  名：
Numerical Simulation on Inner Flow Field of 9R-40 Rubbing and Breaking Machine Based on Sliding Meshes
作  者：
Ma Qian;Liu Fei;Zhao Manquan;College of Mechanical and Electrical Engineering,Inner Mongolia Agricultural University;
关键词：
rubbing and breaking machine;;flow analysis;;transient simulation;;sliding meshes;;unsteady flow
摘  要：
So as to studying the structure and status of inner flow field of rubbing and breaking machine,the Turbulent unsteady flow field of unloaded working conditions under rotating rate at 2 800 r / min were simulated with computational fluid dynamics( CFD) and moving meshes method. Acquired its properties of flow area inside altering with time,which reflects the transient flow field structure information accurately. The simulated results could show that the low pressure area appeared in region of 0 ~ 20 mm radius near the throwing chamber,while maximum pressure zone formed between the gap of throwing blades and the inner wall forming a reflux resulting in material could not discharge easily. Axial pressure and velocity evenly distributed resulting in airflow of shattered room is short of axial mobile. This article provided a new method for structure optimization of inner flow field of rubbing and breaking machine,suggested directions about improving the models,laid a theoretical foundation in order to optimize the efficiency of the aircraft.

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