篦齿封严装置流动诱导力的计算

本文以文献1、2]的模型和方法为基础,对篦齿封严装置的流动诱导力作了一些研究导出有些不同的线化公式,算例结果也有所不同。 

VALUATION OF FLOW-INDUCED FORCE IN LABYRINTH SEAL

The continuity equation and momentum equation of the flow through a sectorial element in labyrinth seal is linearized according to the presumption of the small disturbance and solved with the aid of matrix method.Then the distribution of the pressure on the cylindrical surface of rotor is obtained.Finally,the flow induced force on rotor is evaluated by means of integration.Numerical example indicates that as the number of seal chamber increases,the flow induced force increases while the leakage flow rate decreases;when the seal clearance increases,the flow induced force decreases while the leakage flow rate increases;but both the flow induced force and leakage flow rate decrease when the exit pressure increases.