ADJUSTMENT METHOD OF TEST GAS-TURBINE ENGINE Russian patent published in 2015 - IPC G01M15/14 

FIELD: engines and pumps.

SUBSTANCE: invention relates to aircraft engine building, namely to aircraft gas-turbine engines. A test GTE made as two-stroke and two-shaft is subject to adjustment. GTE adjustment is performed in stages. One to five GTE are subject to tests for compliance with the specified parameters at each stage. An investigation is made. For analysis and assessment of the state, disassembly is performed when necessary with further possible adjustment and/or replacement of parts of any of the modules and/or assemblies of the test GTE. Any module of those damaged during tests or those that do not correspond to the required parameters - from a low pressure compressor to an all-mode controlled jet nozzle is tested and when necessary replaced with adjusted ones. At the adjustment stage, the test GTE is subject to testing as per a multi-cycle programme. When performing the test steps, alteration of the modes, which exceed as to duration the programmed flight time, is performed. Typical flight cycles are shaped, on the basis of which there determined as per the programme is damageability of the most loaded parts. The required number of loading cycles during the test is determined based on the above. Full scope of tests is formed, including a quick change of cycles in the complete register from quick selection of maximum or full forced power mode till complete stop of the engine, and then, representative cycle of continuous operation with multiple alteration of modes in the whole working spectrum with various span of range of the mode change, which exceeds the flight time at least by 5 times. Quick selection of maximum or forced power mode in some part of the test cycle is performed at the rate of acceleration and discharge.

EFFECT: improvement of reliability of test results at an adjustment stage of test GTE and enlargement of representativeness of evaluation of service life and reliability of operation of a gas-turbine engine in a wide range of regional and seasonal conditions of further flight operation of engines.

5 cl, 2 dwg, 1 ex