漆包机烘炉循环风道温度均匀性的仿真优化研究  

Numerical Simulation and Optimization on Temperature Uniformity of Circular Air Duct in the Oven for Enamel-covered Machine

作　　者：欧俭平[1] 廖文高[1] 马爱纯[1] 董红莉[1] 

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083

出　　处：《工业加热》2013年第3期1-4,7,共5页Industrial Heating

摘　　要：为提高漆包机烘炉内循环风道横向温度均匀性以满足漆包线生产工艺要求,运用FLUENT软件对国内某厂生产的RHW3600漆包机循环风道内温度场、流场及压力场进行了数值模拟,分析了风道内温度不均匀及压力损失较大的主要原因,并对其结构型式进行优化设计。结果表明:分道模型有利于炉膛横向温度分布的均匀性;适当缩小匀风装置挡板尺寸可减少风道压力损失、提高炉膛两侧温度,但风道的横向温差略有增加;在匀风装置出口和分风道进口水平段加装导流挡板能有效提高炉膛横向温度分布的均匀性。本文提出的4种优化方案中,方案D模型最优,与实物模型相比,风道的横向最大温差降低了7 K,压力损失降低了4.7 Pa。To improve the transverse temperature uniformity of circular air duct in the oven of enamel-covered machine and meet the requi- rement of enamelled wire production craft, the FLUENT software was used to simulate the temperature field, flow field and pressure field of the circular air duct in the oven for the enamel-covered machine RHW3600, then the main causes of uneven temperature distribution and high pressure loss in air duct was analyzed, and the design of duct structure was also optimized. Results indicate that divided duet model is helpful to the transverse temperature uniformity of the oven, the pressure losses in air duct was decreased and the temperature distribution in the two flanks of the oven is improved with the guide baffle narrowed properly in air uniform device, but the transverse tem- perature difference in air duct increases slightly. The transverse temperature uniformity of the oven can be improved effectively with guide baffle at the horizontal segment of air uniform device exits and branch ducts entrances. Among the 4 schemes proposed in this paper, scheme D is the best scheme to improve temperature uniformity of the system. Compared with the real object model, the maximum tem- perature difference in air ducts and the pressure losses of scheme D are reduced by 7 K and 4.7 Pa respectively.

关 键 词：循环风道 数值模拟 热风均匀性 导流挡板 压力损失 

分 类 号：TH6[机械工程—机械制造及自动化] S624.44[农业科学—园艺学]