Prediction of submersible maneuvering performance at high incidence angles

A model is described to predict the hydrodynamic loads on an underwater vehicle at high incidence angles. The model has been implemented into a trajectory program to allow the prediction of highly nonlinear maneuvers such as low speed hovering and vertical rise and descent. Two key features of the model are the ability to predict out-of-plane loads due to asymmetric hull vortex shedding and fin loads through the linear, stall and post-stall flow regimes. Model validation was performed by comparing predicted total force and moment coefficients with missile and airship data