METHOD OF CONSIDERING EFFECT OF OPERATING WATER-JET PROPULSOR ON POSITION HYDRODYNAMIC CHARACTERISTICS OF UNDERWATER OBJECT Russian patent published in 2021 - IPC B63H25/00 

FIELD: shipbuilding.

SUBSTANCE: invention relates to control of vessels, in particular, underwater vehicles, is intended to determine parameters of stability and controllability of underwater object and can be used for prediction of trajectories of underwater vehicles performing complex maneuvering. In order to take into account the effect of the operating water-jet propeller on the hydrodynamic positioning characteristics of the underwater facility, determining the underwater object rotation center, forming the three-dimensional electronic model of the underwater object, internal three-dimensional grid is formed around said three-dimensional electronic model. Internal computing grid is made with possibility of rotation together with three-dimensional electronic model of underwater object relative to external computation grid. In the calculated area occupied by internal and external computational grids, distribution of flow velocity and pressure fields is determined, fluid velocity at the inlet boundary relative to the flow of the design area is set equal to the linear speed of the underwater object. Inner computational grid around the three-dimensional electronic model of the underwater object is shaped to a spherical shape with the center of the sphere coinciding with the point of rotation of the underwater object. In the aft part of the three-dimensional electronic model of the underwater facility, a water-jet propulsor with an impeller is formed. Around the impeller water-jet propeller cylindrical computer grid is formed, with the possibility of water-jet propeller impeller rotation relative to internal spherical computer grid. Water-jet propeller impeller rotation frequency is set and angular movements of underwater object are set in angle of attack angles α, drift β and bank θ. As a result, stationary hydrodynamic effects on underwater object are determined at different values of angles of attack α, drift β and bank θ, they are analyzed and position hydrodynamic characteristics of underwater object with operating water-jet propeller are determined.

EFFECT: higher safety of underwater object control, higher accuracy of underwater object control.

1 cl, 4 dwg