Advanced Fluidic Thrust Vectoring With Dual Throat Nozzle: Achieving Superior Thrust Vectoring Angle and Efficiency With Dual Port Injection

This study investigates the performance enhancement of a novel fluidic thrust vectoring (FTV) technique utilizing a dual throat nozzle (DTN). The DTN incorporates dual secondary injection ports strategically positioned within the cavity to amplify pressure differentials and improve sonic-plane skewing. By manipulating port locations, the study aims to optimize the thrust vectoring angle (δp) and thrust efficiency (η). Performance parameters, including the thrust coefficient (Cf), coefficient of discharge (Cd), δp, and η, are evaluated for various port configurations. Results demonstrate that positioning the second port closer to the upstream throat enhances δp and η due to increased interaction between primary and secondary flows. The optimal configuration, MSD10, achieves a maximum δp of 12.760° at nozzle pressure ratio (NPR) = 4 and secondary pressure ratio (SPR) = 1.5. Although the second port introduces a slight reduction in η, consistent performance across a range of NPRs indicates robustness in off-design conditions. The study concludes that the optimal operating condition for the DTN is at NPR = 4 and SPR = 1, achieving a δp of 8.792° with a 2.2% secondary injection mass flow rate and maximum η of 3.954%.