A numerical effort was undertaken in an attempt to better understand experimental anomalies experienced during flight tests of the 155-mm VAPP projectile. The initial efforts presented herein validate the numerical methodology for low angles of attack across the Mach regimes (subsonic, transonic and supersonic) as well as provide a framework through which a greater understanding of the phenomena associated with the experimental anomalies can be pursued. The results showed that a wall function mesh and solution methodology accurately predicted most of the static coefficients and dynamic derivatives. Only the roll induced side moment required use of the solve-to-the-wall mesh and solution methodology for reasonable agreement with experimental results. Agreement between numerical and experimental results is mostly reasonable. The exception is the induced static side moment, which the static simulations predict to be negligible, whereas non-negligible values were included in the experimental data reduction included in order to reproduce the trajectory. As such, the simulations also do not predict the coning reversal observed in the experimental flight tests.
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