Table 1

Comparison between calculation results and results in Ref.［12］

Fig.1

Pressure time and frequency diagram at monitor point 1

Fig.2

Pressure time and frequency diagram at monitor point 2

Table 2

Simulation calculations compared with results in Ref.［12］

Fig.3

Cross-section of grain

Fig.4

Burning position of finocyl aft-corner of grain at different times

Fig.5

Convergence section surface of nozzles

Table 3

Diving depths of different surfaces

Fig.6

Different corner structure configurations and distribution of pressure monitoring points

Table 4

Propellant and gas parameters

Fig.7

Pressure distribution of different quantities of grids

Fig.8

Flow field vorticity distribution contour of basic model

Fig.9

Pressure amplitude diagram of monitoring points

Fig.10

Pressure frequency diagram of monitoring points

Fig.11

Flow field vorticity distribution contour of models T1-T6

Fig.12

Graph of RMS value of velocity in direction X

Fig.13

Graph of RMS value of pressure

Table 5

Comparison of calculation results of T1-T6 working conditions

Fig.14

Flow field vorticity distribution contour of models N1-N5 and T2

Table 6

Comparison of frequencies of different nozzle surfaces

Fig.15

Comparison of pressure frequencies

Table 7

Main frequencies and amplitudes

Fig.16

Sketch map 1 of geometry for simulation calculations

Fig.17

Sketch map 2 of geometry for simulation calculations

Fig.18

Distribution of monitoring points

Fig.19

Diagram of turbulent kinetic energy RMS values at monitoring points

Fig.20

Graph of RMS value of turbulent kinetic energy

Fig.21

Distribution of acoustic modal

Fig.22

Flow field vorticity distribution contour of models G1-G5 and T2

Fig.23

Graph of RMS value of vorticity in direction X1/L

Fig.24

Graph of RMS value of vorticity in direction Y1/R0

Table 8

Comparison of calculation results of different dump structures