Computational investigation of secondary flow thrust vector control technology used in a convergent-divergent nozzle

The finite volume method with second-order TVD scheme was used to solve the 2D Reynolds average N-S equation by coupling RNS κ-e turbulence model and non-equilibrium wall function. Flow phenomena in 2D convergent-divergent nozzle using secondary flow thrust vector control technology were numerically simulated. The calculation results show that the shock wave generated by secondary flow jet move toward downstream divergent section and the thrust vector angle gradually decreases to a preset value as the nozzle pressure ratio increases. Along with the increase of the secondary flow pressure ratio, the shock move toward upstream divergent section and the thrust vector angle gradually increases; the effect of the secondary flow pressure ratio on the shock wave and the thrust vector angle is stronger than the effect of nozzle pressure ratio.