Theoretical-experimental study of optimization of operational parameters of protective nets of aircraft power units

ანოტაცია

This scientific work discusses increasing the effectiveness of a bird-proof mesh for aircraft components (propeller, fan, compressor, etc.) by optimizing the mechanical, geometric, and aerodynamic parameters of its constituent cells.

Instead of steel wires, ropes made from high-strength composite fibers produced by world-renowned companies were selected for the protective net: Dyneema (DSM-Holland), Spectra-75 (Honeywell USA), Zylon (Toyobo MC Corporation, Japan), VECTAN (DuPont); Kevlar (DuPont). Taking into account the specific type of aircraft and its flight and operational conditions, the geometric parameters of the ropes of the cells constituting the protective net were specified (diameter, dimensions of the sides of the net cell, etc.). On a modernized tensioning machine UTM-M, the breaking strength limit of selected ropes was determined within the framework of extreme environmental operating temperature conditions of +60 -60 ⁰C. A net was made from Dyneema fiber rope with the best characteristics and was tested on a dynamic stand at various bird weights and impact speeds.

Using a mathematical model and computer simulation programming created by scientists at the Scientific Research Center of the Georgian Aviation University, the conditions for the containment, fragmentation, and tearing of the net when birds hit a protective net were determined.