Numerical simulation of flow-field for shock induced axisymmetric fluidic vectoring nozzle

Asub-scaled numerical simulation employing RNGk-ε model was conducted to determine the internal flow-field structure of a shock induced axisymmetric fluidic vectoring nozzle with a slot in its divergent section,when the nozzle pressure ratio(NPR) was 3～10,and the flow flux ratio of the secondary flow injection to the primary flow(W_s/W_p)was 2.5%～20%.The results from comparison of computational and experimental data indicate that,the relative tolerance of wall static distribution is less than　10.1%.The flow-field structure is very complicated for the secondary flow injection.The flow structure is characterized in that,a pair of opposite revolving separated vortex exists in the divergent section and a large recirculation region locates between the secondary flow injection and the outlet.The flow field structure changes with NPRand W_s/W_p.