摘要
为了解决现有岩棉生产成丝室运行中所存在的集棉鼓集棉均匀度不理想以及废品率较高这两个主要问题,本研究利用数值模拟方法对成丝室内气固两相流场展开研究,分别采用欧拉方法和拉格朗日方法描述气相场和颗粒相岩棉纤维的运动,建立并求解成丝室内气固两相流的数学模型,获得不同工作条件下的集棉均匀度及废品率。研究表明:随着吹离风导流翅片角度逐渐增加,各辊出口后吹离风气流相互干扰的程度也随之增加,这将导致废品率的提高,但是需要通过设置合理角度的翅片来保证集棉鼓集棉的均匀度,所以这种扰动不可避免;下诱导风风量占成丝室所有风量的49.2%,成丝室后半段下诱导风的风速和风量对废品率有显著影响。
During the operation of the rock wool made room,the problems of non-ideal evenness and high rejection rate of collected rock wool may occur. In order to solve the problems,the numerical simulation method was used in this paper for the study on the gas-solid two-phase flow field in the rock wool made room. The paper adopted separately the Euler and Lagrange methods to describe the rock cotton fiber movement of the gas phase and that of the particle phase,established and solved the mathematical model of gas-solid two-phase flow,and obtained the ideal evenness and rejection rate of the collected rock wool under the different operating conditions. The study results show that with the gradual increase of the blow off airflow guide fin angle,the degree of the mutual interference of blow off airflow behind the roller outlet will enhance accordingly,which results in the increase of the rejection rate. But the in-terference is inevitable,because it is necessary to set the fin with the reasonable angle to ensure the ideal evenness of collected rock wool. The lower induced air volume accounts for 49. 2% of all the air volume in the rock wool made room,so the air velocity and air volume of the lower induced airflow in the second half section of the rock wool made room have a significant influence on the rejection rate.
出处
《热能动力工程》
CAS
CSCD
北大核心
2016年第3期30-37,136-137,共8页
Journal of Engineering for Thermal Energy and Power
基金
国家自然科学基金资助项目(51390492)
关键词
气固两相流
流场优化
数值模拟
岩棉生产成丝室
gas-solid two-phase flow
flow field optimization
numerical simulation
rock wool made room
