GAS-TURBINE ENGINE TESTING METHOD Russian patent published in 2019 - IPC G01M15/14 

FIELD: test technology.

SUBSTANCE: invention relates to the aircraft engine building, and in particular to the gas turbine engines (GTE) testing methods. GTE testing method includes the parameters values adjustment to standard atmospheric conditions, taking into account of changes in the working fluid properties and the gas turbine engine flow part geometric characteristics with the atmospheric conditions changing. According to the invention, performing the engine testing at the selected engine operating mode at the same barometric pressures and the same air humidity with different air temperatures at the engine input, measuring the parameters at the number of air temperatures at the engine input, including t=+15 °C temperature, bringing them to the standard atmospheric conditions by the known method, calculating correction factors that take into account of changes in the engine particular type characteristics during the ambient temperature change: Ki=A_t=+15/A_t≠+15, where A_t=+15 is the parameter value measured at the air to the engine input temperature of t=+15 °C, A_t≠+15 is the parameter value measured at the air input temperature that differs from t=+15 °C, and brought to the standard atmospheric conditions, forming the correction factors dependences on the measured parameters from the air temperature at the engine input Ki=f(t_in), and during bringing parameters on the other engines, additionally multiplying the brought parameters values by the Ki coefficients.

EFFECT: enabling the possibility of the test results more correctly bringing to the standard atmospheric conditions and increase in the test results representativeness.

1 cl, 2 dwg, 2 tbl