Accession Number : ADD016565

Title :   Steam-Augmented Gas Turbine.

Descriptive Note : Patent, Filed 21 May 93, patented 19 Jul 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Urbach, Herman B ; Knauss, Donald T

Report Date : 19 Jul 1994

Pagination or Media Count : 22

Abstract : A steam-augmented gas turbine engine system generally includes a compressor (3), first and second combustors (4a, 4b), a compressor turbine (6) and a power turbine (7). A heat exchanging system (8b) removes heat from an exhaust product from the power turbine (7) and preheats water which has been desalinated by a water purification system (12). The desalinated water is provided to the first combustor (4a), as a predetermined quantity of water-steam mass, along with fuel and compressed air, and is used to efficiently power the turbine system. In one embodiment, a two-boiler system (8b) is employed in which first and second steam outputs are provided to first and second combustors (4a, 4b) such that a mass flow of the compressor turbine (6) is substantially constant from a Cheng point to a stoichiometric point of a predetermined power profile. This constancy of mass flow ensures that the gas generator operates on design from the Cheng point to the stoichiometric combustion point. Additionally, the free-power-turbine (7) always operates on design.

Descriptors :   *GAS TURBINES, *PATENTS, AIR, BOILERS, COMBUSTION, COMBUSTORS, COMPRESSED AIR, COMPRESSORS, CONSTANTS, ENGINES, FLOW, FUELS, GENERATORS, HEAT, MASS, MASS FLOW, OUTPUT, POWER, PROFILES, PURIFICATION, QUANTITY, STEAM, TURBINES, WATER, HEAT EXCHANGERS

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE