为了改善木材干燥室内部风速场的均匀性以提高干燥质量,对材堆到侧墙距离为0.30 m,风机风速分别为2.0、3.0、4.0 m/s的工况下木材干燥室内部风速场,采用Fluent进行数值模拟与分析,得到风速分布最佳时的工况。此外,在最优风速场工况下,通过改变材堆到侧墙距离(0.25、0.30、0.35 m),对试验结论进行验证。结果表明:对于顶风式木材干燥室,选择风机风速为3.0 m/s、材堆到侧墙距离0.30 m时,木材内部风速场最均匀,采用Fluent得到的模拟值与实际值相差不大。通过Fluent方法对木材干燥室内部风速场进行数值模拟,可有效优化风速场的均匀性。
Abstract
To improve the uniformity of wind velocity field in wood drying kiln so as to improve wood drying quality, Fluent was taken to simulate and analyze the wind velocity field in wood drying kiln. The optimal velocity was measured and got under the conditions that the distance between the wood stack and the wood kiln wall was 0.30 m, and the air velocity of the fan were 2.0 m/s, 3.0 m/s and 4.0 m/s, respectively. Experimental results were verified at the optimal velocity under the conditions that the distance between the wood stack and the wood kiln wall were 0.25 m, 0.30 m and 0.35 m, respectively. Results showed that the uniform wind velocity field could be obtained under the conditions that the fan velocity was 3.0 m/s and the distance between the wood stack and the wood kiln wall was 0.30 m.Few discrepancy between simulation and the experiment existed. The Fluent software could be taken to simulate and optimize the air velocity in wood drying kiln.
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基金
收稿日期:2015-01-30 修回日期:2015-08-13
基金项目:国家林业公益性行业科研专项项目(201404502)
第一作者:沙汀鸥(bjtingou@126.com)。*通信作者:伊松林(ysong lin@126.com),教授。
引文格式:沙汀鸥,杨洁,吕欢,等. 木材干燥室内部风速场的数值模拟与优化[J]. 南京林业大学学报(自然科学版),2016,40(1):129-134.
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