多温区网带式干燥机热流场分析与结构优化

S226.6; 为实现连续式干燥机温度分区要求,该研究设计了一种基于分层孔板送风的四层网带式干燥机.首先,采用计算流体力学(Computational Fluid Dynamics,CFD)方法优化了气流分配室出风孔结构参数;并以油茶籽为干燥对象,基于油茶籽干燥动力学特性,建立了干燥机CFD模型,以温度不均匀系数作为单层温度均匀性、温度分层偏离度作为分层温度显著性的评价指标,研究了送风温度自上而下逐层递减和递增两种工况下其内部温度场分布规律.研究结果表明,在送风温度递减和递增两种工况下,自上而下各层温度不均匀系数分别为3.08％、2.00％、1.89％、1.60％和2.37％、2.04％、2....

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Published in农业工程学报 Vol. 37; no. 18; pp. 40 - 47
Main Authors 龚中良, 王鹏凯, 李大鹏, 易宗霈, 刘豪, 文韬, 张镇
Format Journal Article
LanguageChinese
Published 中南林业科技大学机电工程学院,长沙410004 15.09.2021
Subjects
数值模拟;优化;干燥机;温度分区;油茶籽
Online AccessGet full text
ISSN1002-6819
DOI10.11975/j.issn.1002-6819.2021.18.005

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Abstract S226.6; 为实现连续式干燥机温度分区要求,该研究设计了一种基于分层孔板送风的四层网带式干燥机.首先,采用计算流体力学(Computational Fluid Dynamics,CFD)方法优化了气流分配室出风孔结构参数;并以油茶籽为干燥对象,基于油茶籽干燥动力学特性,建立了干燥机CFD模型,以温度不均匀系数作为单层温度均匀性、温度分层偏离度作为分层温度显著性的评价指标,研究了送风温度自上而下逐层递减和递增两种工况下其内部温度场分布规律.研究结果表明,在送风温度递减和递增两种工况下,自上而下各层温度不均匀系数分别为3.08％、2.00％、1.89％、1.60％和2.37％、2.04％、2.42％、3.31％,递减工况下温度分层偏离度为4.94％,递增工况下温度分层偏离度为3.57％.可有效实现温度分区的功能.为了进一步优化干燥机温度均匀性和温度分层有效性,为每一层气流分配室设置阻流板.结构优化后,对于温度递减和递增工况,各层温度不均匀系数的降幅分别达到了13.0％～66.3％和24.0％～51.7％,温度分层偏离度降幅分别达到了10.9％和10.1％,分层温度均匀性和温度分区效果得到改善.研究结果可为网带式干燥机进行分区可控变温干燥提供参考依据.
AbstractList S226.6; 为实现连续式干燥机温度分区要求,该研究设计了一种基于分层孔板送风的四层网带式干燥机.首先,采用计算流体力学(Computational Fluid Dynamics,CFD)方法优化了气流分配室出风孔结构参数;并以油茶籽为干燥对象,基于油茶籽干燥动力学特性,建立了干燥机CFD模型,以温度不均匀系数作为单层温度均匀性、温度分层偏离度作为分层温度显著性的评价指标,研究了送风温度自上而下逐层递减和递增两种工况下其内部温度场分布规律.研究结果表明,在送风温度递减和递增两种工况下,自上而下各层温度不均匀系数分别为3.08％、2.00％、1.89％、1.60％和2.37％、2.04％、2.42％、3.31％,递减工况下温度分层偏离度为4.94％,递增工况下温度分层偏离度为3.57％.可有效实现温度分区的功能.为了进一步优化干燥机温度均匀性和温度分层有效性,为每一层气流分配室设置阻流板.结构优化后,对于温度递减和递增工况,各层温度不均匀系数的降幅分别达到了13.0％～66.3％和24.0％～51.7％,温度分层偏离度降幅分别达到了10.9％和10.1％,分层温度均匀性和温度分区效果得到改善.研究结果可为网带式干燥机进行分区可控变温干燥提供参考依据.
Author 刘豪
李大鹏
文韬
张镇
龚中良
王鹏凯
易宗霈
AuthorAffiliation 中南林业科技大学机电工程学院,长沙410004
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Zhang Zhen
Wang Pengkai
Li Dapeng
Wen Tao
Liu Hao
Yi Zongpei
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Snippet S226.6; 为实现连续式干燥机温度分区要求,该研究设计了一种基于分层孔板送风的四层网带式干燥机.首先,采用计算流体力学(Computational Fluid Dynamics,CFD)方法优化了气流...
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Title 多温区网带式干燥机热流场分析与结构优化
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