热风干燥烘房气流速度场均匀性优化

〖HK44〗〖HT5”H〗摘要：〖HT5”K〗针对常规干燥烘房存在气流速度场不均匀，导致木材干燥不均、干燥效果差的问题，课题组在常规干燥烘房的基础上，设置风机引导送风罩，利用FLUENT对设置3种规格送风罩的烘房进行数值模拟，结果表明600 mm×300 mm矩形出风口的引导送风罩可以使气流速度场均匀性达到最佳；将其与常规干燥烘房进行对比，结果表明设置600 mm×300 mm引导送风罩的干燥烘房能使气流速度更加均匀，气流均方差降低了2.5%，变异系数降低了4.0%。本研究可提高木材干燥的均匀性。

Optimization of Airflow Velocity Field Uniformity in Hot Air Drying Kiln

Conventional drying kiln has uneven airflow velocity field, which leads to uneven drying of wood and poor drying effect. Based on the conventional drying, guide air cover was set up. FLUENT was used to numerically simulate the drying kiln with three kinds of guide air cover, it was concluded that the guide air cover of the 600 mm×300 mm rectangular air outlet could optimize the uniformity of the airflow velocity field. Compared with the conventional drying kiln, the results show that the drying kiln with 600 mm×300 mm guide air cover can make the airflow speed more uniform, the airflow mean variance is reduced by 2.5%, and the coefficient of variation is reduced by 4.0%, which can significantly improve the uniformity of wood drying quality.