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粮堆热学特性的数值模拟 被引量:1

NUMERICAL SIMULATION OF THERMAL PROPERTIES OF GRAIN PILE
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摘要 利用FD-TC-B型导热系数测试仪对小麦品种进行直接测试,获得小麦品种的导热系数.在圆柱坐标下,选取适当的边界条件,利用MATLAB求解粮堆的热传导方程;将小麦的导热系数代入热传导方程,得出粮堆温度场随时间变化的分布情况.利用计算机模拟筒仓粮堆温度场的变化,结果表明,对于圆筒粮仓,外界的热量主要通过粮堆顶部传入粮堆,然后以一定的梯度向底部传递,数值计算与粮库实测结果一致. The thermal conductivity coefficients of several varieties of wheat were measured by a FD-TC-B thermal conductivity tester. Under a circular cylindrical coordinate system, the thermal conductivity coefficients were introduced into a heat transfer equation, and the heat transfer equation was solved by MATLAB selecting proper boundary conditions to obtain the time-varying temperature field distribution condition of the grain pile. The temperature field change of the grain pile was simulated by a computer, and the results showed that the external heat was substantially transferred to the grain pile from the top for silos, and then was transferred to the bottom with a certain gradient;and the calculation result was consistent with the actual measurement result of the grain bin.
出处 《河南工业大学学报(自然科学版)》 CAS 北大核心 2013年第4期66-69,共4页 Journal of Henan University of Technology:Natural Science Edition
基金 河南省高校创新人才支持计划(2011HASTIT018)
关键词 粮堆 温度场 MATLAB 模拟 grain pile temperature field MATLAB simulation
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