罩式退火炉热过程数学模型与实验验证
发布时间：2018-11-01 15:07
【摘要】：考虑对流板复杂的几何结构,建立三维模型,采用正交试验法模拟获得流量、外径和炉内温度对炉内各处努塞尔数Nu分布的影响,得到流量在考察的3种因素内流量的影响作用最强的结论。接着进一步分析Nu随流量的变化,并拟合得到各处Nu与流量的关系式;为了解决炉内复杂几何形状条件下的辐射换热角系数求解问题,采用Monte Carlo方法建立炉内辐射换热角系数求解模型,并最终采用热辐射网络图法求解炉内辐射换热。通过现场进行热电偶插片实验验证本文所建立模型的准确性。研究结果表明:模拟计算得到的温度与现场实测值基本一致,证明了模型的准确可靠性。
[Abstract]:Considering the complicated geometry of the convection plate, a three-dimensional model was established, and the effects of flow rate, external diameter and temperature on the Nu distribution of Nusselle number were simulated by orthogonal test. It is concluded that the flow rate has the strongest effect on the three factors. Then, the variation of Nu with flow rate is analyzed, and the relationship between Nu and flow is obtained by fitting. In order to solve the problem of radiative heat transfer angle coefficient under complex geometry in furnace, the Monte Carlo method is used to set up a model to solve the radiation heat transfer angle coefficient in furnace, and finally, the heat radiation network method is used to solve the radiation heat transfer coefficient in furnace. The accuracy of the proposed model is verified by field experiments on thermocouple inserts. The results show that the temperature obtained by the simulation is basically consistent with the field measured value, and the model is proved to be accurate and reliable.
【作者单位】： 北京科技大学机械工程学院;北京科技大学冶金工业节能减排北京市重点实验室;
【基金】：中央高校基本科研业务费专项资金资助项目(FRF-TP-14-021A1)~~
【分类号】：TG155.1
[Abstract]:Considering the complicated geometry of the convection plate, a three-dimensional model was established, and the effects of flow rate, external diameter and temperature on the Nu distribution of Nusselle number were simulated by orthogonal test. It is concluded that the flow rate has the strongest effect on the three factors. Then, the variation of Nu with flow rate is analyzed, and the relationship between Nu and flow is obtained by fitting. In order to solve the problem of radiative heat transfer angle coefficient under complex geometry in furnace, the Monte Carlo method is used to set up a model to solve the radiation heat transfer angle coefficient in furnace, and finally, the heat radiation network method is used to solve the radiation heat transfer coefficient in furnace. The accuracy of the proposed model is verified by field experiments on thermocouple inserts. The results show that the temperature obtained by the simulation is basically consistent with the field measured value, and the model is proved to be accurate and reliable.
【作者单位】： 北京科技大学机械工程学院;北京科技大学冶金工业节能减排北京市重点实验室;
【基金】：中央高校基本科研业务费专项资金资助项目(FRF-TP-14-021A1)~~
【分类号】：TG155.1
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