Fig.1

Physical model

Table 1

Parameters employed in this study

Fig.2

Boundary conditions

Fig.3

Mesh division

Fig.4

Specific calculation flow of two-way FSI

Fig.5

Results of this study compared with literatures［14，21］

Table 2

Parameters in baseline working condition

Fig.6

Instantaneous pressure contours of gas film in baseline working condition

Fig.7

Variation of instantaneous pressure along circumferential direction at Z/L=0.5 in baseline working condition

Fig.8

Contours of time-averaged pressure of gas film in baseline working condition

Fig.9

Contours of axial velocities at different clearance at the position of No. 2 foil on the radial section

Fig.10

Position of middle section and vector diagram of different regions of No.2 foil in baseine working condition

Fig.11

Schematic diagram of deformation of top and bumb foil at the center section in baseline working condition

Fig.12

Displacement and pressure of monitoring points with time in baseline working condition under quasi-steady state

Fig.13

Time-averaged pressure contours of gas film at different rotational speeds under quasi-steady state

Fig.14

Distribution of time-averaged pressure along the circumference of the center section at different rotational speeds under quasi-steady state

Fig.15

Variation of instantaneous pressure along circumferential direction at different speeds under quasi-steady state

Fig.16

Schematic diagram of time-averaged radial deformation of elastic foil combination at different speeds （30 times enlarged）

Fig.17

Variation of displacement and pressure of monitoring points with time at different rotational speeds

Fig.18

Time-averaged pressure contours of gas film at different clearance heights under quasi-steady state

Fig.19

Distribution of time-averaged pressure along the circumference of the center section at different heights under quasi-steady state

Fig.20

Schematic diagram of time-averaged radial deformation of foils combination at different clearance heights （30 times enlarged）

Fig.21

Time-averaged pressure contours of gas film with different eccentricities

Fig.22

Distribution of time-averaged pressure along the circumference of the center section at different eccentricities under quasi-steady state

Fig. 23

Schematic diagram of time-averaged radial deformation of foil with different eccentricities under quasi-steady state （30 times enlarged）

Fig.24

Contours of time-averaged pressure of gas film with different Young’s modulus under quasi-steady state

Fig.25

Distribution of time-averaged pressure along the circumference of the center section with different Young’s modulus under quasi-steady state

Fig.26

Variation of instantaneous pressure along circumferential direction at different Young’s modulus under quasi-steady state

Fig. 27

Schematic diagram of time-averaged radial deformation of foils combinations with different Young’s modulus （30 times enlarged）

Fig.28

Variation of displacement of monitoring points with time at different Young’s modulus