| 紫花苜蓿茎秆在常压热风干燥中的传质模拟研究 |
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| 引用本文： | 车刚,李成华,汪春,万霖.紫花苜蓿茎秆在常压热风干燥中的传质模拟研究[J].农业工程学报,2007,23(5):27-31. |
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| 作者姓名： | 车刚 李成华 汪春 万霖 |
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| 作者单位： | 1. 黑龙江八一农垦大学工程学院,大庆,163319
2. 沈阳理工大学,沈阳,110168 |
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| 基金项目： | 黑龙江省教育厅科技攻关项目 |
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| 摘 要： | 根据斐克定律和质量守恒原理，建立了可以预测干燥过程中苜蓿茎秆内部水分分布的常压热风干燥的传质数学模型。通过对扩散模型边界条件的处理，结合紫花苜蓿茎秆内部水分扩散的干燥试验结果，采用数值模拟方法确定了干燥苜蓿茎秆的传质系数。结果表明，干燥苜蓿样本的含水率与模拟分析含水率的决定系数为R2=0.927，模拟分析具有较高的准确度。在此基础上进行的苜蓿茎秆内部水分分布的模拟计算保证了与苜蓿非稳态干燥过程的一致性。
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| 关 键 词： | 常压热风干燥 苜蓿茎秆 传质模型 数值模拟 |
| 文章编号： | 1002-6819（2007）5-0027-05 |
| 收稿时间： | 2006/7/15 0:00:00 |
| 修稿时间： | 2006-07-152006-10-10 |
Moisture mass transfer simulation of alfalfa stem convective airflow drying |
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| Che Gang,Li Chenghu,Wang Chun and Li Yuqing.Moisture mass transfer simulation of alfalfa stem convective airflow drying[J].Transactions of the Chinese Society of Agricultural Engineering,2007,23(5):27-31. |
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| Authors: | Che Gang Li Chenghu Wang Chun and Li Yuqing |
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| Institution: | College of Engineering, Heilongjiang August First Land Reclamation University, Daqing 163319, China;Shenyang University of Technology, Shenyang 110168, China;College of Engineering, Heilongjiang August First Land Reclamation University, Daqing 163319, China;College of Engineering, Heilongjiang August First Land Reclamation University, Daqing 163319, China |
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| Abstract: | According to Fick's law and principle of mass conservation, mass transfer model for convective airflow drying of alfalfa was established for forecasting moisture distribution inside alfalfa stem. Through boundary condition treatment of diffusion model and combination of experiment results of moisture diffusion inside alfalfa stem, moisture diffusion coefficient was calculated by using the method of numerical simulation. The result showed that determination coefficient on experimental data with simulation results was 0.927, which indicated that simulation had higher accuracy. Moisture diffusion simulation inside alfalfa stem was in accordance with non-steady drying procedure. |
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| Keywords: | convective airflow drying alfalfa stem mass transfer model numerical simulation |
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