ENGINE OPERATION METHOD AS PER TECHNICAL STATE THEREOF Russian patent published in 2021 - IPC G01M15/00 

FIELD: machine building.

SUBSTANCE: invention relates to operation of gas turbine engines and is used to estimate their residual life. Method of engine operation by its technical state includes determination of actual operating time of engine, its comparison with permissible values and determination of residual resource of engine. In operation of the gas turbine engine, the engine operating range is determined from the gas temperature downstream the turbine and divided into at least two subranges based on the gas temperature behind the turbine at the nominal power value, in each of which at boundary values of gas temperature and corresponding to these values of heat and gas-dynamic loads on part with given resource value based on characteristics of material of part, determining static strength factors K_mi with allowance for material creep limit, selecting the most loaded part with minimum value K_mi, for each sub-range determining average value of coefficient K_{mi avg}, in the first subrange from the gas temperature after the turbine at the nominal power value; mean value of safety factors is taken as basic value K_{mi av. bas.}, then, for each sub-range, the relationship b_i = K_{mi avg bas.}/K_{mi avg} is determined, and time interval T_e, during which the operating state of the engine is maintained, is determined by formula: T_e=Σb_i*τ_i, where τ_i is actual operating time of the engine during operation in each sub-range; b_i is conversion factor of actual operating time to more loaded modes.

EFFECT: disclosed method allows increasing service life and duration of engine life cycle by taking into account actual load on its part during operation.

1 cl, 3 tbl