大型旋转机械中汽封间隙流激振分析——非定常欧拉解

A Nonsteady Flow Solution oriented Euler Method for Analyzing the Exciting Force of Steam Flow in the Gland Seal of a Large sized Turbomachine

从汽封内理想振荡流场的振幅方程出发 ,通过合理的数学分析与推导 ,得到汽封内汽流对转子激振力的表达式 ,这一表达式能真正反映汽封内振荡汽流对转子的作用机理 ,通过分析 。

A mathematical expression of the steam flow in a gland seal with respect to a rotor exciting force has been obtained through a rational mathematical analysis and derivation, and on the basis of an amplitude equation featuring an ideal oscillating flow field in the gland seal. The above mentioned expression can truly reflect the action mechanism of the oscillating steam flow in the gland seal toward the rotor. Through a detailed analysis the author has identified a range of real factors which can trigger rotor destabilizing vibrations.