METHOD OF OPERATING AIRCRAFT GAS TURBINE ENGINE BASED ON TECHNICAL STATE THEREOF Russian patent published in 2021 - IPC G01M15/14 

FIELD: aviation.

SUBSTANCE: invention relates to diagnostics of technical state of aircraft gas turbine engines taking into account specific operating conditions. Achievement of maximum allowable values of accumulated damage of main parts when using the declared method occurs after expiration of longer period of operation compared to the prototype. Thus, using the disclosed method reduces the cost of the engine life cycle. Said technical result is achieved by the fact that in the disclosed method of operating an aircraft gas turbine engine based on its technical state, consisting in comparing the actual engine running time and accumulated damage of main engine components with their maximum permissible values, determined by results of resource tests on ground test bench, and subsequent determination of residual life of engine and its main parts based on results of said comparison, wherein accumulated damage of engine main parts is determined as sum of products of number of standard loading cycles assigned for flight, determined by ranges of cyclic loading variation of main engine parts, in its turn determined by characteristic parameters of engine operation, to corresponding single damageability, according to disclosed method entire range of operation of aircraft gas turbine engine in coordinates of parameters of full temperature T^*_in and total pressure P^*_in at engine inlet is divided into zones, determining for each main part and each typical loading cycle maximum unit damageability in each zone, then based on analysis of operational data of aircraft determine probability of each typical loading cycle in each selected zone of total number of cycles of this type, then weighted average unit damageability is determined for each typical cycle of each main part along the whole range of engine operation, then, when determining accumulated damage, weighted average unit damageability is used.

EFFECT: technical result achieved using the disclosed method is more complete use of potential capabilities of main engine parts by resource, by using an improved mechanism for calculating accumulated damage.

1 cl, 2 dwg, 2 tbl