北京航空航天大学学报 ›› 2006, Vol. 32 ›› Issue (06): 716-720.

• 论文 • 上一篇    下一篇

高可靠性航空电子设备热分析中的有限体积法

付桂翠, 王香芬, 姜同敏   

  1. 北京航空航天大学 工程系统工程系, 北京 100083
  • 收稿日期:2005-06-29 出版日期:2006-06-30 发布日期:2010-09-20
  • 作者简介:付桂翠(1968-),女,辽宁抚顺人,副教授, fuguicui@sina.com.cn.

Finite volume method in thermal analysis of avionics

Fu Guicui, Wang Xiangfen, Jiang Tongmin   

  1. Dept. of System Engineering of Engineering Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2005-06-29 Online:2006-06-30 Published:2010-09-20

摘要: 阐述了热对系统可靠性的影响,对比了数值法求解温度场分布的优缺点.针对航空电子设备热分析中同时要求满足高的分析精度和快的计算速度的问题,提出用有限体积法求解温度场分布的计算方法.根据典型航空电子设备的结构特点,建立了温度场的数学模型,给出了边界条件.在此基础上,用有限体积法对待求解方程离散化,给出了离散化过程中网格划分及边界的处理方法.结合实例进行了温度场求解,计算结果与热测量结果进行了对比,得到了较高的分析精度,验证了方法的有效性.最后对计算误差进行了分析,并提出了进一步热设计的合理化建议.

Abstract: The influence of heat to the system reliability was introduced. The merits and drawback of numerical methods in solving temperature distribution were compared. In order to solve the problem of avionics of high reliability which requires highly precise result and rapidly computational velocity in thermal analysis, a computed approach of the finite volume method (FVM) to solve the temperature distribution was devoloped. The mathematical model of temperature distribution was built based on typical avionics and its boundary condition was given. Then the control equation was discretized by means of the FVM. The mesh division, the process of discretization and the disposal of boundary were included. The temperature distribution was calculated with an example. The comparison between the result of calculation and the result of measurement demonstrates a high precision of thermal analysis. The validity of this method was verified. The reason of calculated error was indicated and a reasonable proposal about further thermal design based on the result was offered in the end.

中图分类号: 


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发