Nozzle Thrust Eccentricity Calculation Based on FLUENT Software

Abstract Thrust eccentricity refers to the phenomenon that thrust vector deviates from axis of symmetry. This will produce lateral force and torque around aircraft, which affects normal flight increases required control torque, reduces density uncontrolled rockets. There are three sources eccentricity: mass eccentricity, geometric aerodynamic eccentricity. The is caused by asymmetrical flow combustion gas in nozzle. paper uses FLUENT software carry out a numerical simulation cone-shaped By changing different factors such as structure inner surface nozzle convergence radius, influence law nozzles on pneumatic explored. following conclusions were drawn: With expansion half-angle, second zero point moves toward outlet. relative radius curvature has little effect main but certain its thrust, increases, first zeros move throat.