OPERATING METHOD OF GAS TURBINE ENGINE WITH PROTECTIVE MESH AT INLET AND ANTI-ICING SYSTEM Russian patent published in 2019 - IPC F04D27/02 

FIELD: machine building.

SUBSTANCE: invention relates to engine building and can be used in systems of protection and control of stationary gas turbine plants, gas pumping units for protection of gas turbine engine from surging. Method for improving operating reliability of an engine is solved by a method of operating a gas turbine engine with a protective mesh at the inlet and an anti-icing system, according to which experimentally before operation for air temperature at engine inlet t boundary value t_bnd is selected from interval +2…+7 °C, on the basis of which two engine operation programs are formed, namely cold mode for t≤t_bnd and hot mode for t>t_bnd, also for all rotor speeds of compressor n determine initial value of pressure drop on protective grid P_in by pressure sensors installed before and after it, and setting an upper boundary of pressure drop corresponding to motor surging P_surge, in addition, for cold mode boundary icing P_ic, and for hot mode boundary of contamination P_cont, wherein icing and contamination boundaries lie between boundaries P_surge and P_in and are at least 10 % away from the latter, then, during real-time operation, measuring current value of pressure drop on protective grid P_current and depending on air temperature at engine inlet according to selected engine operation program is compared to P_ic or, respectively, with P_cont, and, if in hot mode P_current≥P_cont, engine is stopped and protective mesh is inspected, if in cold mode P_current≥P_cont, anti-icing system is switched on for not less than 10 minutes, and upon completion of its operation in case P_current reduced by not less than 10 % of its value at the moment of activation of anti-icing system, continues operation in standard mode, and if said reduction has not occurred, then engine is stopped and inspection of protective mesh, and, regardless of selected engine operation program, if P_current≥P_surge, engine is stopped.

EFFECT: disclosed is a method of operating a gas turbine engine with a protective mesh at the inlet and an anti-icing system.

3 cl, 2 dwg