摘要
基于有限元的热-弹性耦合算法,在等冷气耗量条件下,对旋转轮盘内应力水平与其表面温度分布的关联性进行了数值研究.在转速为6000 r/min,内、外缘温度分别为600℃和650℃条件下,盘面温度沿半径方向采用不同的"V"形变化时,得到了盘内等效应力水平随盘面温度分布变化的规律.计算结果表明:采用"V"形变化的盘面温度分布可以有效地降低盘内应力水平,说明了盘内应力水平与盘表面的温度分布存在着较强的关联性,在保证航空发动机整体气动性能的前提下,通过控制涡轮盘表面温度分布来有效降低轮盘的应力水平是可行的.
The effects of temperature distribution on stress level in a rotating disk at a fixed flux of cooling air was numerically studied using coupled thermal-elastic method based on the finite element technique. The rotating speed is fixed at 6 000 r/min, and the temperatures of inner rim and outer rim are 600 ℃ and 650 ℃, respectively. Detailed information of stress level change with surface temperature distribution of rotating disk was discussed. Numerical results reveal that there exists a strong relation between the surface temperature distribution of rotating disk and stress level inside the rotating disk. The V-shape temperature distribution can significantly reduce the stress level.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2008年第4期623-628,共6页
Journal of Aerospace Power
关键词
航空、航天推进系统
应力水平
旋转轮盘
温度分布
aerospace propulsion system
stress level
rotating disk
temperature dis tribution
