MEASURING AND PROCESSING DATA SYSTEM FOR DYNAMIC PROCESSES IN THE GAS TURBINE ENGINE GAS-AIR PATH DURING DEVELOPMENT TESTS

Gas turbine engine dynamic stability research is an important stage of development tests aimed at ensuring its reliability. Finishing work is complicated by the fact that the engine stability depends on the interaction of many functional units, including compressor, combustor, turbine, and also on the mode of its operation and the large number of external factors. Purpose of the article is to ensure the process of testing facilities more information about the running engine gas-dynamic processes. It can speed up the identification of deficiencies in the design, elimination procedures and to reduce the finishing and final stage testing time to establish more accurately the engine stability actual border. To improve the reliability of the determination of the initial stage of occurrence of stall processes running in the engine, a new approach to the selection of monitored parameters – flexural vibrations of rotor blades and the pressure pulsations is proposed. The generalized structure of the system of collecting information on based on means to ensure the efficiency of the sensors used in these extreme conditions, operation, as well as the necessary dynamic performance is considered. Principles of these systems and a description of their operation are disclosed. The possibilities of the system to determine the shear phenomena options for calculating the parameters characterizing the bending vibrations of the blade and examples of presentation the results in graphical form are observed. The future proposed use of funds during normal operation of the engine is indicated.