基于CFD的茶叶理条部件试验与优化#br# #br#

针对茶叶理条机锅槽温度均匀性差的问题，采用计算流体力学(CFD)建立理条部件的温度场仿真模型。运用PT100温度传感器测量理条部件作业时中间平面的温度并与仿真结果进行对比，实测温度与相对应的仿真温度最大相对误差为12.1 ℃，平均相对误差为9.5 ℃，最大绝对误差为5.9%，平均绝对误差为4.67%，说明采用该模型对理条部件的温度场进行模拟是可行的。运用该模型对理条部件进行优化设计，结果表明：当采用环形电阻丝按照125 mm、105 mm、85 mm、65 mm的间距梯度布置时，理条部件中间平面的温度均匀性系数从0.847增加到0.935，温度均匀性增加了104%，为进一步提高理条部件的温度均匀性提供了思路。

Experiment and optimization of tea slitting parts based on CFD

We established the temperature field model of tea slitting parts in view of the poor uniformity of the temperature in pot sink of tea slitter by using Computer Fluent Dynamic (CFD). We measured the operating temperature of tea slitting parts by using PT100 temperature sensor and compared it with the temperature at the same position in the temperature field model. The relative maximum error between measured temperature and simulated temperature was 12.1 ℃, the relative average error was 9.5 ℃, the absolute maximum error was 5.9% and the absolute average error was 4.67%, which showed that it was feasible to use the model to simulate the temperature field of slitting parts. And we used this model to optimize the design of slitting parts. The temperature uniformity coefficient of the mid plane of slitting parts increased from 0.847 to 0.935 and the temperature uniformity increased by 10.4% when the ring resistance wire was arranged according to the interval gradient of 125 mm, 105 mm, 85 mm and 65 mm, which provided a way to further improve the temperature uniformity of slitting parts.