Aerospace Instrument-Making Annotation << Back NEW OPPORTUNITIES FOR DETECTING POMPAGE PHENOMENA TAKING INTO ACCOUNT THE LATEST ACHIEVEMENTS IN MEASUREMENT GAS TURBINE ENGINE GAS TEMPERATURES Zh.A. Sukhinets, A.L. Galiev, A.I. Gulin, O.O. Valiamova The article presents an overview of the consequences of the impact of pompage on the gas turbine engine in aviation that led to disasters. Due to the lack of a well-founded theory and the main reason, it is believed that pompage is a violation of gas-dynamic stability in the gasair path of the engine. However, the lack of fast-acting means of measurement and control does not allow us to detect the beginning of these violations. The main way to combat it is the constructive solution of using several coaxial shafts in the engine, rotating independently of each other with different speeds of rotation. Each of the shafts carries a part of the compressor and a part of the turbine. The first (from the air intake) part of the compressor (low pressure compressor) is connected to the last part of the turbine (low pressure turbine). Modern engines usually have two or three shafts. The higher-pressure shafts rotate at higher speeds, giving the high-pressure air the required kinetic energy. They are not able to fully mitigate the risks, but they significantly reduce them. This forced approach significantly complicates the design, increases the weight and reduces the reliability of the gas turbine engine. The use of thermocouples due to the very low speed does not guarantee an early warning of pompage. The article substantiates the use of jet generators with external feedback, the advantages of which are: high sensitivity, low inertia, simple confi guration of the flow part. The components of the dynamic error are studied in detail. A block diagram of a differential device for measuring the temperature of a gas flow is presented and its operation is described. The results of testing the temperature meter on a real engine, confirming its effectiveness, are presented. Keywords: gas turbine engine, pompage, differential temperature meter, jet-acoustic sensor. DOI: 10.25791/aviakosmos.3.2021.1210 Pp. 28-40.