ABOUT UNSIMILAR MODES OF GAS TURBINE ENGINE GAS GENERATOR AT DIFFERENT INLET AIR TEMPERATURE

O.V. Kislov

The operation lines of the gas generator compressor and turbine at different inlet air temperature are considered. The dependence of their positions from inlet air temperature are shown. The operation line displacement at a fixed area of the critical section behind of the gas generator is explained by similarity violation of the gas generator modes. It is shown that the non-similarity of gas generator modes at different inlet air temperatures is due to change relative fuel consumption. Other causes of the operation line displacement by varying the inlet air temperature are identified. Conditions of similarity gas generator modes are formulated. The results can be used in the recalculation results of gas generator tests from atmospheric conditions on the conditions, according gas generator modes in the engine.

Key words: gas generator, the similarity of operating modes, the relative fuel consumption, corrected fuel consumption.