TEST METHOD OF GAS TURBINE ENGINE IN ATTITUDE CLIMATIC TEST BENCH Russian patent published in 2019 - IPC G01M15/00 G01M15/14 

FIELD: engine building.

SUBSTANCE: invention relates to testing of gas turbine engines, in particular to testing methods for determination of altitude-speed characteristics of gas turbine engines in simulated flight conditions as per scheme with connected pipeline, and can be used in aircraft industry. Method is characterized by that the tested engine is started, which is installed according to the scheme with the connected pipeline at the inlet with the external piping in the thermal pressure chamber of the high-altitude bench. Air is supplied to the receiver of the high-altitude test bench at the input of the engine. Value of pressure drop is regulated in system of technological ventilation of high-temperature test bench. Calibration is carried out with the engine running at a constant rotor rpm by measuring two control points. Wind suction coefficient is calculated. Then, when testing the engine, using the obtained calibration curve and the measured value of pressure drop in the system of process ventilation, the value of the external aerodynamic drag force of the engine in the thermo-pressure chamber is determined. Taking into account the results of determining the value of the external aerodynamic drag force in the thermo-pressure chamber, the value of the internal flight thrust and the value of the engine thrust rod are determined.

EFFECT: technical solution allows improving accuracy of determination of values of test bench and internal flight thrust of the engine.

1 cl, 5 dwg