Exploring the impact of vector thrust on aircraft maneuverability utilizing bypass dual throat nozzle technology

Abstract

With the progressive maturation of fluidic Thrust Vectoring technology, future advanced fighter aircraft are poised to adopt the new nozzle with higher vector efficiency. This research paper introduces an innovative analytical framework that seamlessly integrates nonlinear aircraft dynamics with thrust vectoring nozzles. An F-16 aircraft model and a bypass dual throat nozzle (BDTN) are introduced to analyze the impact of thrust vectoring on flight performance. Key findings indicate that thrust vectoring nozzles significantly enhance aircraft climb performance, resulting in a notable 28.1% increase in climb rate. Furthermore, the flow losses associated with these nozzles have minimal influence on the aircraft's kinematic state, with a mere 4.2% impact on mechanical energy within 10 s under a 20% thrust loss scenario. For thrust-vectored models performing maneuvers at a given pitch rate, a critical velocity threshold emerges. Above or equal to this threshold, thrust vectoring augments aircraft maneuverability; however, velocities below this threshold may lead to airspeed loss and increased risk of stall, emphasizing the delicate balance necessary for optimal performance. Lastly, the study reveals that during complex maneuvers, thrust vectoring enhances the aircraft's sideslip capability, further underlining its significance in enhancing overall flight performance.