Computations of roll-damping stability derivative for body/cruciform-tail configuration

The roll damping stability derivatives of the cruciform-finned axisymmetric body are computed using the algorithm based on non-moving inertial frame and compared with the experimental data. Full Navier-Stokes equations with pointwise version of Baldwin-Barth one equation turbulence model are formulated in a fully coupled, implicit, large block structure. Harten's TVD scheme for inviscid terms and the central differencing for viscous terms in the explicit operators are employed. The implicit LDU method is adapted to solve large block-structure matrix equations. With body spinning in the non-moving inertial frame, no source terms and coordinate transformations are introduced, but the velocity component is derived by the production of constant-rate angular-velocity vector Ω and position vector r at finned axisymmetric body surface. Good agreement between experimental data and computational predictions are obtained. © 2002 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.