欢迎登录材料期刊网

材料期刊网

高级检索

本文将数值方法应用于物性测试,用反问题的研究方法,通过建立物料的内部水分扩散模型及边界条件的处理,把反映物料干燥过程动态特性的实验含水率曲线与物料颗粒内部的水分扩散结合起来,确定物料颗粒在非稳态脱水过程中的内部水分扩散系数,并分析内部水分分布及其动态特性。计算结果与实验曲线拟合的分析表明,本文的方法是可行的,对于进一步分析干燥过程参数对种子劣变的影响及确定优化的干燥工艺从而达到干燥控制的目的有重要的意义。

This paper has applied the numerical method to the determination of physical property. Through the building of the internal moisture diffusion model and the simplification of the connective boundary condition, the moisture diffusionin side the material has been organically combined with the drying experiment alcurves, which describes the material drying process dynamic characteristics todetermine the internal moisture diffusivity during the unsteady dehydrated process and analyze the distribution of internal moisture and its dynamic characteristics. Comparison between the numerical calculating result and the drying experimental curves shows that this ways used in this paper is feasible.The research on the internal moisture diffusion has the significant meaning tothe further study the effect of the drying factors on the mechanism of seed degraded and the determine of the optimized drying technology at the aim ofdrying control.

参考文献

[1] Zhang Min.Thin Layer Airflow Drying of Sword Bean afterPretreatment[A].,1992:1544-1548.
[2] A A J Ketelaars.Determination of Diffusion Coefficients from Experimental Moisture Concentration Profiles in Clay[A].,1992:345-352.
[3] 周仪;王慧.植物学[M].北京:北京师范大学出版社,1991
[4] 南京农学院;华南农学院.植物学[M].上海:上海科学技术出版社,1981
[5] 杨俊红;褚治德 等.蔬菜种子干燥中种皮的效应与优化传热传质机理[J].工程热物理学报,1997,18(06):721-724.
[6] 褚治德,杨俊红,孟宪玲,诸凯,李春英,江菊元,焦士龙.蔬菜种子的干燥动力学及其活性[J].工程热物理学报,2000(02):220-223.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%