Experimental studies of geometric and force characteristics of models of a midwater trawl in flume tank of “Fishering Service”
The article presents research aimed at practical and experimental confirmation of the developed theory of the polyphysical similarity of the trawl complex, using the example of the development of a medium-depth trawl project for catching grouse (Coregonus albula) in the Vishtynets Lake. To determine the geometric and hydrodynamic characteristics of the trawl structures of the developed trawl project, its models were made and experimental studies were carried out using a reasonable methodology in the modernized Fishing-Service hydraulic channel. According to the experimental data obtained, the values of the hydrodynamic resistance of the rope-mesh part Rx and the coefficients of the hydrodynamic resistance of the rope-mesh part Cx were calculated for the trawl models, depending on the area of the mouth of the trawls Fy at a given distance between the knives that turned turn out to be equal, thereby proving the validity of the theory used.