The work is devoted to the development of technology for detecting cracks in the aircraft engines blades during an airplane flight without stopping it. For these purposes, a method is proposed and an experimental installation is designed to verify it and obtain results for the application of this technology in practice. The main experimental tasks are set, which are planned to be worked out on this installation.
In this work, an experiment was carried out that allows choosing an active substance in the system for early detection of microcracks in the blades of gas turbine engines. The aim of the work is to compare several active substances by measuring the signal generated by each of them at the same temperatures and concentrations of the active substance. A current signal is obtained by applying a voltage between two electrodes placed in a stream of hot gas. The strength of the electric current arising between the electrodes in the hot gas flow depends on the ionization of the gas caused by the active substance. The current signal is the main criterion for choosing an active substance. A study was also carried out on the effect of gas temperature on the strength of the signal caused by the active substance. This experiment is one of the main stages in the creation of a system for detecting microcracks in gas turbine blades.
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