METHOD FOR OPERATION OF AN AIRCRAFT GAS TURBINE ACCORDING TO ITS TECHNICAL CONDITION Russian patent published in 2023 - IPC G01M15/14 

FIELD: operation; diagnostics of aircraft gas turbine engines.

SUBSTANCE: method for operating an aircraft gas turbine engine according to its technical condition includes determining the accumulated damage of each main part of the engine, taking into account engine operating modes and then determining the residual engine life by comparing the integral length of a crack that develops in one or more dangerous places of the highest stress concentration of the main part during engine operation from a defect not detected by non-destructive testing methods, with a maximum allowable value, in the event that the calculated value of the integral crack length approaches the maximum allowable value, the presence and actual length of the crack are controlled by non-destructive testing devices and operation is stopped if the control reveals that the actual crack length has approached its maximum permissible value, the ranges of flight conditions for implementation of engine loading cycles are predetermined, the ranges of flight conditions for the implementation of loading cycles are divided into zones, for each zone and each main part, dependence of the stress intensity factor on the length of the crack is calculated and, when determining the crack growth for the flight and the integral crack lengths the registered parameters that determine the operation of the engine are taken into account, including parameters that characterize the flight conditions for the implementation of each loading cycle.

EFFECT: ensuring a more complete use of the potential capabilities of engine parts in terms of resource due to the use of an improved mechanism for calculating the length of the crack.

4 cl, 5 dwg