Fig.1

Structural schematic diagram of hypersonic adjustable vector nozzle

Table 1

Operating conditions of hypersonic adjustable vector nozzle

Fig.2

Schematic diagram of different modes of hypersonic adjustable vector nozzle

Table 2

Main geometric parameters of Volvo-S1 nozzle

Fig.3

Wall pressure distribution and Mach number contours of Volvo-S1 nozzle

Fig.4

Schematic diagram of medium density grid and boundary conditions

Fig.5

Pressure distribution on the center line of upper wall with different grids

Fig.6

Mach number contours of the fixed geometry nozzle with different NPR

Fig.7

Mach number contours of the center meridian plane of no-TV-LMa mode

Fig.8

Mach number contours of no-TV-LMa mode with closed secondary flow

Fig.9

Pressure contours of no-TV-LMa mode with secondary flow closed

Table 3

Net thrust statistics of outer and middle ring flowpath with closed/open secondary flow

Table 4

Proportional relationship between base drag and axial thrust with closed/open secondary flow

Fig.10

Mach number contours of no-TV-HMa mode

Fig.11

Thrust coefficient within the flight envelope of two nozzles in no-TV mode

Fig.12

Mach number contours of hypersonic adjustable vector nozzle in TV mode

Fig.13

Thrust coefficient of hypersonic vector nozzle and each ring flowpath in TV mode

Fig.14

Vector angle of hypersonic vector nozzle and each ring flowpath in TV mode

Fig.15

Pressure distribution at the wall center line of middle and outer ring expansion sections of upper half of the nozzle in TV mode

Fig.16

Bench-mounted view of the scaled-down test model of hypersonic adjustable vector nozzle

Fig.17

Comparison of experimental and simulated wall pressure in no-TV-HMa mode

Fig.18

Comparison of experimental ripple shadows and density gradient cloud maps in no-TV-HMa mode

Fig.19

Comparison of experimental and simulated wall pressure in no-TV-LMa mode

Fig.20

Comparison of experimental ripple shadows and density gradient cloud maps in no-TV-LMa mode

Fig.21

Comparison of experimental and simulated wall pressure in TV mode

Fig.22

Comparison of experimental ripple shadows and density gradient cloud maps in TV mode

Fig.23

Shock wave contours of TV mode