Abstract: A computational study was conducted to validate different turbulence models for fluidic thrust vectoring of a two-dimensional convergentdivergent nozzle with multiple injection ports. One of SA, SST k-ω, EASM k-ω, k-ζ model was used to close the RANS equations and then simulated both the external and internal flow of the thrust vectoring nozzle at free stream Mach number 0.05 or 0.1 with nozzle pressure ratio (NPR) from 4.6 to 10 and secondary pressure ratio (SPR) 0.7 or 1.0. All the four turbulence models had done a good job in predicting the performance of the thrust vectoring nozzle compared to the experimental data, but in the separated region there was some difference in the pressure distribution along the primary nozzle wall, it maybe caused by the unsteady effect of the separated flow. The numerical results of four turbulence models indicate that at NPR=4.6, multiple-injection nozzle has a higher efficiency of thrust vectoring, but at higher NPR, one-injection port nozzle is more efficient.