| 戚禹康,王远成,鲁子枫,俞晓静.稻谷自然储藏多尺度热湿耦合传递研究[J].中国粮油学报,2019,34(6):109-113 |
| 稻谷自然储藏多尺度热湿耦合传递研究 |
| Study of numerical simulation on multi-scale coupled heat and moisture transfer in paddy field |
| 投稿时间：2018-08-18 修订日期：2018-12-12 |
| DOI： |
| 中文关键词: 多尺度 稻谷 数值模拟 热湿传递过程 |
| 英文关键词:multiscale paddy numerical simulation heat and moisture transfer process |
| 基金项目:国家重点专项（2016YFD0400100，2016YDF0401002)；国家粮食公益专项（201513001）；国家自然基金项目资助（51276102） |
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| 中文摘要: |
| 该文采用计算流体力学(Computational Fluid Dynamics,简称CFD)的方法,以稻谷为研究对象,建立粮堆内部和粮粒热湿传递的数学模型,从粮堆和粮粒两种尺度,探究自然储藏过程中外界气象参数变化时粮堆内部的热湿变化以及稻谷颗粒内部热湿传递与周围空气的温湿度关系。研究发现自然储藏时粮堆内温度变化和水分迁移主要受外界环境与粮堆内自然对流的影响，且自然对流也会影响到粮堆和粮粒内部的温度和水分变化。但是粮粒内部温度变化不同于粮堆内部的温度的变化，因此，粮情检测系统的传感器测得的温度无法真实反应粮粒内部的情况。该文研究结果可为储藏过程中粮堆局部发热和霉变的控制与防护提供理论依据。 |
| 英文摘要: |
| In this paper, Computational Fluid Dynamics (CFD) method is used to establish the numerical model of heat and moisture transfer in the grain pile and the grain. From the two scales of grain pile and grain, the heat and humidity change inside grain pile，the relationship between the heat and humidity transfer inside grain and the temperature and humidity of surrounding air were studied when the external meteorological parameters changed or the temperature and humidity gradient was produced by the ventilation of grain silo. The study found that temperature changes and water migration in the grain storage during natural storage are mainly affected by the external environment and natural convection in the grain pile, and natural convection will also affect the temperature and moisture changes inside the grain pile and grain. However, the internal temperature change of the grain is different from the temperature inside the grain pile. Therefore, the temperature measured by the sensor of the grain detection system cannot truly reflect the inside of the grain. The results of this paper can provide a theoretical basis for the control and protection of local heat and mildew in the grain storage during storage. |
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