Leonov V. Hydrodynamics of energy extinguishers for ships gidroprivod systems

Thesis for a scientific degree of Candidate of Technical Sciences at specialty 05.22.20 - Exploitation and Repair of Transport Facilities. - Odessa National Marine University of Ministry of Education and Science of Ukraine, Odessa, 2010. Dissertation devoted to the problem solution of ship’s hydraulic drive systems work upgrading on start and peak modes of exploitation. Main result of the work is a hydrodynamic unit for extinguishing of surplus energy at the moving flow of working liquid. It is set in numerical and model experiments, that near-by to fair arises complicated vortical area, taking away at a stream surplus energy in a necessary amount. Character of time-history of local and integral parameters of disk fair was studied. Technique for design, production, assembling and exploitation of surplus pressure extinguisher, is formulated. On its basis the optimum values of construction parameters of energy extinguisher and kinematics characteristic of working flow is possible to receive. A methodic allows to estimate the value of the taken away surplus hydrodynamic head. Keywords: line of ship’s hydraulic drive, surplus head, hydrodynamic extinguisher of energy, drag coefficient, coefficient of local losses, length of near wake.