Numerical Calculation of the Security of Deploying and Retracting Underwater Towed System

In order to evaluate the security of an underwater towed system which is deployed or retracted from the up stabilizer of a submarine, the near wake flow field of the propeller and hull was calculated. The vortex lattice method is used for the propeller based on the lifting surface theory, and the panel method is used for the hull, and also the interaction of the two parts is taken into account. A dynamic model of the towed system was established in the non-uniform wake flow field, and the shape of the towed system was investigated by finite difference method. The results of the calculation show that the security is enough for deploying and retracting cable.