Parameters to Assess the Operation of Thrust Vector Control Systems in Jet Engines.

The article focuses on parameters for assessing the operation of thrust vector control (TVC) systems in jet engines, particularly in liquid and solid rocket engines. It presents a multi-parametric optimization approach based on numerical modeling of turbulent viscous compressible gas flow to evaluate various TVC methods, including controllable oscillating nozzles, split nozzles, deflectors, rotating nozzles, paddles, interceptors, and gas or liquid injection. Key dimensionless parameters such as relative lateral force, axial thrust loss, effectiveness coefficient, flow gain, quality coefficient, hinge moment, and aerodynamic coefficients are defined and classified to enable standardized evaluation and comparison of TVC systems and fluidic control methods in flight vehicles. Experimental and numerical studies support the selection and validation of these parameters, which are intended to guide the design and optimization of thrust vector controls for improved flight maneuverability and efficiency.