北京航空航天大学学报 ›› 2017, Vol. 43 ›› Issue (6): 1224-1230.doi: 10.13700/j.bh.1001-5965.2016.0447

• 论文 • 上一篇    下一篇

长时间流固耦合传热过程的快速算法

孟繁超, 董素君, 江泓升, 王浚   

  1. 北京航空航天大学 航空科学与工程学院, 北京 100083
  • 收稿日期:2016-05-24 出版日期:2017-06-20 发布日期:2016-11-16
  • 通讯作者: 董素君,E-mail:dsj@buaa.edu.cn E-mail:dsj@buaa.edu.cn
  • 作者简介:孟繁超 男,硕士研究生。主要研究方向:流场温度场数值仿真技术;董素君 女,教授,硕士生导师。主要研究方向:飞行器环境控制系统仿真及CFD数值计算技术、飞行器综合环境控制及热管理技术、高超声速飞行器气动热环境模拟技术。

A fast algorithm for long-term fluid-solid conjugate heat transfer process

MENG Fanchao, DONG Sujun, JIANG Hongsheng, WANG Jun   

  1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2016-05-24 Online:2017-06-20 Published:2016-11-16

摘要: 针对千秒级长时间流固耦合传热(CHT)过程求解问题,进一步提出一种基于准稳态流场的全局瞬态紧耦合传热的新型松耦合算法。交替使用单独对流体区域进行稳态流场求解的算法更新流场,以及同时对流固区域进行瞬态传热求解的算法计算瞬态温度场。该算法相对于传统流固松耦合算法,可以大大减小流场更新频率,进一步显著提高计算效率。以管内定来流速度空气连续300 s的强制对流瞬态加热过程为例,利用Fluent软件证明了该算法相对于瞬态紧耦合算法获得的管体结构温升最大偏差为5%,而计算耗时减小到14.8%。

关键词: 流固耦合传热, 松耦合, 准稳态, 计算流体力学(CFD), 强制对流

Abstract: Concerning the specific demands for solving problems of the long-term conjugate heat transfer (CHT) problem at the kilosecond level, a new loosely coupled algorithm of the global tightly transient coupled heat transfer based on the quasi-steady flow field is put forward. The flow field is updated alone by steady algorithm and the transient temperature field of the fluid and solid regions are solved by transient heat transfer algorithm alternately. Compared to the traditional loosely coupled algorithm, the computational efficiency is further improved with the greatly reduced update frequency of the flow field. Taking a tube heated by inner forced air flow heating process for 300 s as an example, the results by Fluent software show that, compared to the tightly transient coupled calculation, the maximum wall temperature rise deviation is 5% while the computing time is reduced to 14.8%.

Key words: fluid-solid conjugate heat transfe, loosely coupled, quasi-steady, computational fluid dynamics (CFD), forced convection

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