The labyrinth seal in a compressor stator well was simplified to one-dimensional network model consisting of typical elements. Then the computational models for these elements were built. The present model for the leakage calculation of labyrinth seal didnt consider swirl flow and windage heating impacts. One-dimensional basic equations were used to describe the swirl flow in rotating disc cavity. And empirical correlations were used to calculate the rotor wall friction. Runge-Kutta method was employed to solve these equations about circumferential velocity and windage heating of the rotating flow. An area correction method with swirl flow was adopted

and windage heating made the change of airflow properties. The relative deviation of leakage flow rate result of one-dimensional network and CFD was less than 1.4% with swirl flow and windage heating. Without swirl flow and windage heating

the relative deviation was more than 9.9% and less than 20.1%. Compared with the experimental results

the one-dimensional network calculation results agreed well with each other

the relative deviation was no more than 7%. one-dimensional network calculation took the practical working tip clearance of the labyrinth seal. In rotating labyrinth seal experiment，the practical clearance was obtained by measuring the radial displacement of rotor caused by rotation and thermal deformation as well as the radial displacement of casing caused by thermal deformation.