热分析炉内温度场的气氛流量效应研究  

Research of the Atmosphere Flow Effect on Temperature Field of the Thermal Analysis Furnace

作　　者：叶树亮[1] 袁若浩 杨遂军[1] 

机构地区：[1]中国计量学院计量测试工程学院,浙江杭州310018

出　　处：《机械设计与制造》2015年第9期41-44,共4页Machinery Design & Manufacture

基　　金：国家质检公益性行业科研专项项目(201310102-1)

摘　　要：建立了热分析炉炉体及炉内气氛的物理及数学模型,进行非结构化网格划分,运用流体有限元分析软件ANSYS CFX,在热分析炉炉温匀速升高、气氛以不同流量通入的条件下,使用流固耦合方法,模拟了炉内工作室的非稳态温度场。比较在不同氮气流速下炉内工作室进气口区域温度梯度以及待测样品测试区不同位置点温度与加热炉升温温度的偏差,发现预热结构对流量越大气氛的预热效果越差,而一定量气氛流量对炉内温度场均匀性具有改善效果。该结论为热分析炉设计预热结构和实验选取合适的测试环境提供了参考。The physical and mathematical models of thermal analysis furnace and the atmosphere in it are built, and then the models are divided with unstructured mesh. With the method of fluid-solid coupling, the fluid finite element analysis software ANSYS CFX/s used to simulate the thermal analysis furnace＇s transient state temperature field, which is done under the condition that thermal analysis furnace is in uniform velocity temperature and passes into different amounts of atmosphere flow. The temperature gradient in the furnace inlet zone and the temperature deviation of different points in the sample test zone is compared under the different atmosphere flow, and it＇s found that the more the atmosphere flow, the poorer the effect of the preheating structure. And the distribution of temperature field is ameliorated clearly at a certain atmosphere flow. The conclusion is useful for the thermal analysis furnace to design preheating structure and select appropriate experiment test environment.

关 键 词：热分析炉 ANSYS CFX 温度场 气氛流量 流固耦合 

分 类 号：TH16[机械工程—机械制造及自动化] TH831