储粮压力对玉米粮堆温度场影响的实验与模拟研究

粮堆温度场的分布受储粮压力变化的影响较大。利用自制粮堆实验装置进行了三种不同储粮压力下玉米粮堆静态储藏实验。通过在两壁面提供恒定的温度梯度,竖向方向施加不同压力构建出粮仓内多因子实验环境。根据测点数据拟合出了不同时刻温度分布云图,以及不同储粮压力下温度场变化趋势,得出储粮压力对玉米粮堆温度场的影响规律。并采用COMSOL软件对不同工况下温度场的分布进行数值模拟,模拟结果验证了随着储粮压力增大,粮堆内热量传递也变缓慢,达到稳态时的温度也越低。

Experimental and Simulation Study on the Influence of Grain Pressure on Temperature Field of Maize Pile

The distribution of the temperature field of the grain pile is greatly affected by the change of the grain pressure.The static storage test of corn grain piles under three different grain storage pressures was carried out using a small grain reactor test device.Temperature distribution cloud maps at different times fitted according to the measured point data,And the trend of temperature field under different grain storage pressures,The effect of storage grain pressure on the temperature field of corn grain pile is obtained.Numerical simulation of temperature field distribution under different working conditions using COMSOL software.The simulation results verify that as the pressure of the grain storage increases, the temperature transfer in the grain pile also becomes slower, and the temperature at the steady state is also lower.