关键词: 涡轮;叶尖;间隙;控制;有限元法

Abstract: The calculation method for radial clearance of turbine blade tip considering the effect of temperature and rotational speed is developed in this paper. The transient change of turbine blade tip clearance during the whole flight is computed by means of ANSYS finite element program. To calculate radial displacement the influence of temperature and rotational speed on the turbine and the effect of temperature on the case are considered. The methodology presented in this paper can lay some foundations for further study to control radial clearance of turbine blade tip.

Key words: Turbine;Blade tip;Gap;Control;Finite element method