Accelerated reliability tests of aircraft gas turbine engine with DC and AC generators

In this paper, we consider a methodology for choosing the modes and duration of accelerated tests that ensure equivalence at the same time for all the main elements and characteristics of the consumption of engine service life along with direct current and alternating current generators. The determination of the modes and duration of accelerated tests of the engine and generators is carried out according to the generalized method, which allows as much as possible to ensure the equivalence of accelerated and lengthy damage tests at the same time of all “critical” elements of engine and generator assemblies. Comparative accelerated engine tests carried out under the regimes calculated by the considered method and the method used commercially in the industry showed that in the engine as a whole, the accelerated test efficiency, which was estimated by the level of equivalence of accelerated and lengthy tests, is 2 times higher, which allows more accurate assessment reliability and service life of generators and engine by accelerated testing.