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以下沉式土质墙体日光温室为研究对象,建立了室内温度场的三维非稳态模型,并把随时间变化的外扰作为边界条件,用CFD技术对室内温度场进行模拟计算。结果显示:模拟得到的室内空气和墙体内表面温度的变化规律与实际测试结果变化规律相同,拟合情况较好,最大相对误差为5.9%;室内全天的温度均在14℃以上,可以满足一般喜温作物的生长;温室内东部区域的平均温度比西部和中部区域的平均温度低,靠近室内墙体和地面部分的空气温度较高;夜间室内后坡附近温度较低,应加强后坡的保温措施。
Taking the sunken greenhouse with soils as the research object, a three-dimensional unsteady model of the indoor temperature field was established, and the boundary conditions with time-varying external disturbances were used to simulate the indoor temperature field with CFD technology. The results show that the simulated indoor air and wall surface temperature variation law with the actual test results change the same fitting good, the maximum relative error of 5.9%; Indoor day temperatures are above 14 ℃, you can The average temperature in the eastern part of the greenhouse is lower than the average temperature in the west and middle parts, the air temperature near the indoor wall and the ground part is relatively high, and the temperature near the indoor backhoe at night is low, which should be strengthened Slope insulation measures.