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NUMERICAL STUDY ON THE EFFECT OF ROCKET JET ON THE ROLLING MOMENT OF ARTILLERY ROCKETS WITH WRAP AROUND FINS
Abstract
Tube launched unguided artillery rockets are stabilized in general by canted wrap around fins in order to nullify thrust misalignment and aerodynamic asymmetries. Wrap around fins are located at the rear end of the rocket and are in close proximity of the rocket jet. The effect of rocket jet on the rolling moment generated by the wrap around fins is studied for the powered phase using ANSYS Fluent CFD simulation. External flow over the rocket and internal flow through the rocket nozzle are simulated simultaneously in order to capture the effect of rocket jet on rolling moment generated by the fins. External flow is simulated for subsonic as well as supersonic Mach numbers. Results clearly show that presence of jet alters the rolling moment only for the subsonic external flow. The rolling moment for subsonic external flow has a higher magnitude in the presence of rocket jet.
DOI
10.12783/ballistics22/36128
10.12783/ballistics22/36128
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