COOLING SYSTEM OF A MULTI-CIRCUIT GAS TURBINE UNIT Russian patent published in 2019 - IPC F02C7/18 

FIELD: gas turbine building.

SUBSTANCE: invention relates to gas turbine construction and can be used in cooling systems for aviation multi-circuit gas turbine engines. Cooling system of a multi-circuit gas turbine installation contains a multi-section ring recuperative heat exchanger placed in a flow of cooling air in the flow part of the second circuit of a gas turbine unit and consisting of mechanically interconnected unitary sections with channels for supplying and discharging cooled air from the flow path of the primary circuit, evenly placed across the cross-sectional area of the flow path of the second circuit and represented by a bundle of hollow tubular heat exchange elements, made in one piece, located along the flow part of the second circuit and communicated with the channels for supplying and discharging cooled air. Each unitary section is made in the form of a tree-like bundle of branched fractal heat exchange elements growing in a part of the bundle, located on the side of the cooled air supply channel, and growing together in a part of the bundle, located on the side of the cooled air discharging channel, and the cavities of each fractal heat exchange element of the middle part of the bundle are connected to the cavities of adjacent fractal heat exchange elements, moreover, the heat transfer elements of the first order of both parts of the bundle are perpendicular to the flow of cooling air in the flow part of the second circuit and are made with an ellipsoidal cross-section, major axis of which is oriented in the direction of the cooling air flow of the second circuit, the first-order heat exchanger element of the growing part of the bundle communicates with the cooling air supplying channel, and the first-order heat exchanger element of the accretioning part of the bundle communicates with the cooled air discharging channel.

EFFECT: technical result of the invention consists in increasing the effective heat exchange area of a recuperative heat exchanger and increasing the efficiency of the cooling system.

1 cl, 6 dwg