Experimental and Numerical Study of Thrust-Vectoring Effects by Transverse Gas Injection into a Propulsive Axisymmetric C-D Nozzle Vladeta Zmijanovic * , Luc Leger † , Viviana Lago ‡ C.N.R.S. Institute for Combustion Aerothermodynamics Reactivity & Environment, Orleans, France Mohamed Sellam § and Amer Chpoun § Laboratory for Mechanics and Energetics at University of Evry, Evry (Paris region), France Transverse gas injection into a divergent section of a convergent-divergent rocket noz- zle have been investigated for thrust vectoring effects as the segment part of the CNES P erseus program. Cold flow experiments on conical and truncated ideal nozzles have been conducted in the hypersonic windtunnel EDITH. These experiments are compared and complemented by the numerical investigation results of the compressible FANS numerical solver CPS C. Number of parameters and performance criteria have been examined and reported. It is found that pertinent vector force is possible to be achieved via such fluidic thrust vectoring system. Nomenclature F x,y,z force components in x, y and z direction, N F j secondary injection reactive force, N F w force acting on the nozzle wall, N f m mass flow rate ratio g 0 standard gravity acceleration h injectant penetration height I s p specific impulse ˙ m primary mass flow rate, g/s ˙ m j secondary mass flow rate, g/s P 0 main flow total pressure, kPa p a ambient pressure, kPa p j secondary injection pressure, kPa p s 0 stagnation pressure, kPa p p 0 plateau pressure, kPa p/p s dimensionless pressure q dynamic pressure x j x dimension of the secondary injection point, mm x t x length of the nozzle divergent section, mm x/x t dimensionless x coordinate δ pitch thrust-vector deflection angle, deg θ circular arc central angle, deg ϕ injector inclination angle, deg * PhD candidate, CNRS-ICARE & CNES, 1C Av. de la recherche scientifique, Orleans 45071, France. † maitre de conferences, CNRS-ICARE, 1C Av. de la recherche scientifique, Orleans 45071, France. ‡ research engineer, CNRS-ICARE, 1C Av. de la recherche scientifique, Orleans 45071, France. § professor, LMEE d’Universite d’Evry Val d’Essonne, 40 rue de Pelvoux, Evry 91020, France. 1 of 16 American Institute of Aeronautics and Astronautics 48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 30 July - 01 August 2012, Atlanta, Georgia AIAA 2012-3874 Copyright © 2012 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.