METHOD OF AND DEVICE FOR PROTECTION OF GAS-TURBINE ENGINE (VERSIONS) Russian patent published in 2007 - IPC F04D27/02 

FIELD: mechanical engineering; gas-turbine engines.

SUBSTANCE: according to proposed method, pressure is measured after last stage of compressor of gas-turbine engine and analogue signal is converted in real time into electronic signal corresponding to value of ratio of amplitude of fluctuations of current pressure to its mean value. Said electric signal is sequentially compared with preset criterion for type of stability loss in form of frequency range of controlled parameter and threshold operation value in form of limit value of ratio of pressure fluctuations amplitude to mean value and stall signals obtained by results of comparison are supplied to engine actuating mechanisms according to type of stability loss for counteracting to bring engine out of stalling. Surging and rotary stalling and combustion of surging and rotary stalling are used as types of stability losses. At surging, signal are sent to compressor, members, at stalling signals are sent to engine fuel system and compressor members and at combined surging- rotary stalling, first to compressor member and then to engine fuel system.

EFFECT: improved efficiency of protection of turbojet engine in case of loss of gas-dynamic stability owing to selective control of engine actuating mechanisms depending on type of loss of gas-dynamic stability.

7 cl, 7 dwg