Theoretical mooring characteristics and evaluation of the consistency of the propeller and main engine of inland navigation transport vessels

Abstract

An analysis of the dependencies allowing the construction of a family of screw characteristics of the main engines of inland navigation vessels has been performed. It is shown that the engine power when operating in steady-state mode of the screw characteristic can be represented as a product of three multipliers: a constant component determined by the diameter of the propeller, the density of water and the efficiency coefficients of the shaft and transmission; shaft rotation speed and torque coefficient k₂. At the same time, the higher the value of the moment coefficient k₂, the more steeply the screw characteristic will pass. The torque coefficient can be determined both from the engine operation parameters and from the parameters of the propeller and ship movement. By comparing the values of the torque coefficient "according to the engine" and according to the machine diagram of the propeller, an assessment of the consistency of the propeller and the main engine for the passenger ship of project 588 and the cargo ship of project 576 was carried out.