摘要
采用牛顿冷却公式计算PE管内外对流换热系数,在准确的边界条件下建立热熔焊接头的二维轴对称模型,用有限元软件ANSYS对模型进行瞬态热力学仿真,得到焊接过程中温度随时间和位置变化的分布情况。用M7500红外摄像仪对PE管外表面沿轴向的温度分布进行了测量,结果表明仿真与实测结果吻合。最后对接头温度场进行分析,为降温速率对接头质量的影响提供一定的理论依据。
Convective beat transfer coefficients inside and outside the PE pipe are calculated by using Newton＇s cooling formula. The 2-D axisymmetric model of the butt-weld joint with accurate boundary conditions is established. The model is simulated for transient thermodynamic by finite element software ANSYS, and the distribution of temperature changes with time and location in welding process is obtained. Moreover, the outer surface axial temperature distribution of PE pipe is validated by M7500 infrared video camera. The results show that the simulation results and the experimental results are consistent. Finally, the joint temperature field is analyzed, which provides a theoretical basis for the effects of cooling rate on joint quality in cooling stage.
出处
《四川理工学院学报（自然科学版）》
CAS
2014年第2期28-31,共4页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
基金
过程装备与控制工程四川省高校重点实验室开放基金(GK201203)
自贡市重点科技计划项目(2011G035)
四川理工学院人才引进项目(2009XJKRL002)
关键词
高密度聚乙烯
对流换热
接头温度场
有限元分析
high-density polyethylene
convection heat transfer
joint temperature field
finite element analysis
