METHOD OF TESTING GAS-TURBINE ENGINE Russian patent published in 2004 - IPC

FIELD: manufacture of aircraft engines; bench tests of aircraft gas-turbine engines equipped with nozzles at controllable thrust vector.

SUBSTANCE: testing the gas-turbine engine is performed on test bench equipped with dynamometer which is preliminarily loaded with axial, vertical and lateral forces P₁, P₂, P₃ directed opposite axial, vertical and lateral components of thrust force till positive magnitudes of angle of inclination of nozzle is obtained; after engine has attained working mode of operation, nozzle is inclined at angle to vertical axis of engine and axial, vertical and lateral components of thrust force are determined at each angle of inclination. Then graph of dependence of axial, vertical and lateral components versus angle of inclination of nozzle is plotted and angle α of inclination of nozzle is determined by maximum magnitude of axial component of thrust force; then vertical and lateral components of thrust force are determined by means of the following dependences : Ry act.=Ry-Ry⁰ and Rz act.= Rz-Rz⁰, where Ry and Rz are magnitudes of vertical and lateral components of thrust force determined directly on test bench at respective angle of inclination of nozzle and Ry⁰ and Rz⁰ are magnitudes of vertical and lateral components of thrust force corresponding to angle α of inclination of nozzle in graph corresponding to maximum magnitude of axial component of thrust force.

EFFECT: enhanced accuracy of measurement.

3 dwg