导热温度分布的有限元素法分析及瞬态计算的递归公式

本文回顾了导热温度计算程序作为高性能发动机预研项目的进行情况和取得的成果 ,并简要地说明了三维稳态和瞬态温度计算程序的特点。文中结合所用的时间递归公式 ,介绍了瞬态温度计算的稳定性和振荡现象 ,从而说明采用可选择加权系数递归公式的必要性。最后给出了显示稳定性和振荡现象的计算实例

NUMERICAL STUDY OF CONDUCTIVE TEMPERATURE DISTRIBUTION AND RECURRENCE RELATION IN TRANSIENT COMPUTATION

The numerical analysis of steady and unsteady conductive temperature distributions of turbine disk and blade is presented as part of HPPSARP project.It consists of two-dimensional (plane and axisymmetric) and three-dimensional problems.This paper gives a summary illustration of its feactures and emphasis on the stability of time recurrence relations in transient computation.A variable weighted coefficient to summarize the different time schemes is proposed in the developed computing program.It is favourable to improve the accuracy and restrain the oscillation in calculation.Some numerical examples are given to verify the characters of different schemes.