DE102014214038B4 - gas turbine - Google Patents

Abstract

The present invention relates to a gas turbine, in particular an aircraft engine, with an outlet nozzle (1), in which a heat exchanger is arranged, wherein the heat exchanger has at least one segment (20, 30, 40) with a first matrix (21, 41) with first passages connecting a first distribution space (22; 42) for supplying heat exchange medium to be heated into the first passages with a circumferentially spaced first collection space (23; 43) for discharging heated heat exchange medium from the first passages

Description

The work leading to this invention has been funded under the Seventh Framework Program of the European Union (FP7 / 2007-2013) under grant agreement no. 283216 (LEMCOTEC).

The present invention relates to a gas turbine with an outlet nozzle, in which a heat exchanger is arranged.

From your own DE 10 2010 032 324 A1 a gas turbine engine with a heat exchanger is known which comprises a plurality of circumferentially juxtaposed segments with U-shaped recirculating heat exchanger tubes which connect a manifold to an axially spaced manifold. The collecting tube is arranged at the same circumferential position as the distributor tube, so that it is aligned with this in the axial direction.

In-house practice also known as a so-called IRA gas turbine engine ("Inter-cooled Recuperative Aero engine") having a heat exchanger having eight inclined against the axial direction segments with lancets that connect a manifold with an axially and radially spaced manifold, the is also located at the same circumferential position as the manifold.

A gas turbine according to the preamble of claim 1 and claim 8 is known from GB 2 360 085 A known. The sake of completeness is also on the US Pat. No. 7,254,937 B2 pointed.

An object of an embodiment of the present invention is to improve a gas turbine.

This object is solved by the features of claim 1 and alternatively by the features of claim 8. Advantageous embodiments of the invention are the subject of the dependent claims.

According to one aspect of the present invention, a gas turbine has an outlet nozzle in which a heat exchanger is arranged.

In one embodiment, the gas turbine is an aircraft engine, a vehicle engine or a stationary gas turbine. In one embodiment, it has one or more compressors, a combustion chamber arranged downstream in the direction of flow, and one or more turbines arranged downstream thereof and the outlet nozzle arranged downstream of or adjacent thereto, in particular a downstream turbine. In a development, the gas turbine has a core gas channel with one or more compressors, the combustion chamber and one or more turbines and a bypass gas channel parallel to the core gas channel, in particular a jacket gas channel surrounding the core gas channel, in which a fan and / or compressor is arranged. which is coupled to one of the turbines of the core gas channel, in particular via a gear ratio. In a development, the jacket gas channel engages over the outlet nozzle over its entire axial length or part of its axial length.

The heat exchanger includes one or more segments having a first matrix with first passages connecting a first manifold space for supplying heat exchange medium to be heated into the first passages with a circumferentially spaced first manifold for discharging heated heat exchange medium from the first passages.

Due to the distribution of distributor and collecting space in the circumferential direction, the interaction of the exhaust gas flowing through the outlet nozzle with the heat exchanger can advantageously be improved in terms of flow and / or heat technology in one embodiment.

In one embodiment, one or more segments in the circumferential direction each extend, at least substantially, over 360 ° or the entire circumference of a cross section of the exhaust nozzle through which the exhaust gas flows. Additionally or alternatively, one or more stages of two or more, in particular four or more, circumferentially adjacent segments in the circumferential direction together, at least substantially, extend over 360 ° or the entire circumference of an exhaust gas flowed through cross section of the outlet nozzle.

Due to the extent over the full circumference, the interaction of the exhaust gas flowing through the outlet nozzle with the heat exchanger can be advantageously, at least essentially, rotationally symmetrical in one embodiment and thus improved in terms of flow and / or heat technology.

In one embodiment, two or more segments are spaced in the axial direction. As a result, heat can advantageously be removed from the exhaust gas in multiple stages in one embodiment. In particular, two or more segments extending in the circumferential direction each, at least substantially, extend over 360 °, and / or two or more stages of two or more, in particular four or more, circumferentially adjacent segments which extend circumferentially together, at least substantially, over 360 °, spaced in the axial direction or arranged in the flow direction one behind the other.

In one embodiment, one or more segments are circle segments, in particular circular ring segments, which extend, at least substantially, in the radial direction. As a result, in one embodiment advantageously a compact design in the axial direction can be represented. For a more compact representation "circle (ring) segment" below denotes both a circular segment and in particular a circular ring segment.

According to one of the two alternatives of the invention, one or more segments in the flow direction converging cone segments. As a result, in one embodiment advantageously an axially longer heat exchange path and / or an interaction of the exhaust gas flowing through the outlet nozzle with the heat exchanger can be improved in terms of flow and / or heat technology.

In one embodiment, one or more segments extend, at least substantially, from a radially outer gas channel jacket surface of the exit nozzle to a radially inner gas channel jacket surface of the exit nozzle, in particular a core or inner cone of the exit nozzles, or from a radially outer gas channel jacket surface of the exit nozzle to one Longitudinal axis of the outlet nozzles.

By such an extension over the full cross-section of the outlet nozzles through which exhaust gases flow, heat and / or heat can advantageously be extracted from the exhaust gas in one embodiment.

According to the other of the two alternatives of the invention, one or more segments each comprise a matrix pair with a second matrix having second passages, the second manifold space for supplying heat exchange medium to be heated into the second passages with a circumferentially spaced second plenum for discharging heated heat exchange medium from the second passages and with a third matrix having third passages connecting a third distribution space for supplying heat exchange medium to be heated into the third passages with a circumferentially spaced third collection space for discharging heated heat exchange medium from the third passages second and third collecting space is arranged in the circumferential direction between the first distributor space and the first collecting space. In one development, one or more segments each consist of such a first matrix and such a matrix pair.

By the supply and / or removal of heat exchange medium into and out of the second and third passages in the circumferential direction between the supply and the discharge of heat exchange medium into or out of the first passages, in one embodiment advantageously the thermal and fluid dynamics varies , in particular optimized, and thus the interaction of the exhaust gas flowing through the outlet nozzle with the heat exchanger can be improved in terms of flow and / or heat technology.

As stated above, one or more segments may be ring segments. Accordingly, in one embodiment, the first matrix of one or more segments is arranged in the radial direction inside or outside next to the matrix pair of the respective segment and forms with this a circle segment, in particular circular ring segment, which extends, at least substantially, in the radial direction.

By the supply and / or removal of heat exchange medium into and out of the second and third passages in the circumferential direction between the supply and the discharge of heat exchange medium into and out of the first passages and radially outside or inside can advantageously in one embodiment the thermal and fluid dynamics varies, in particular optimized, and thus the interaction of the exhaust gas flowing through the outlet nozzle with the heat exchanger can be improved in terms of flow and / or heat technology.

In a further development, a radial height of the first matrix of one or more circular segments is at least 25%, in particular at least 33%, in particular at least 50%, in particular at least 75% of a radial height of the matrix pair of the respective segment. Additionally or alternatively, the radial height of the first matrix is in particular at most 75%, in particular at most 50%, in particular at most 33%, in particular at most 25% of the radial height of the matrix pair. For example, in one embodiment, the radial height of the first matrix is between ("at least") 25% and ("at most") 75% of the radial height of the matrix pair.

As a result of this division of the active cross-sectional area between the first matrix and the matrix pair, in one embodiment the thermal and fluid dynamics can advantageously be varied, in particular optimized and the flow of the exhaust gas flowing through the outlet nozzle with the heat exchanger can be improved in terms of flow and / or heat technology.

As stated above, one or more segments may be cone segments. Accordingly, in one embodiment, the first matrix of one or more segments is arranged in the axial direction downstream or upstream of the matrix pair of the respective segment and forms with this a cone segment which converges in the direction of flow.

By the supply and / or removal of heat exchange medium into and out of the second and third passages in the circumferential direction between the supply and the discharge of heat exchange medium into and out of the first passages and axially downstream or upstream of the first passages In one embodiment, advantageously, the thermal and fluid dynamics varies, in particular optimized, and thus the interaction of the exhaust gas flowing through the outlet nozzle with the heat exchanger can be improved in terms of flow and / or heat technology.

In one development, an axial length of the first matrix of one or more cone segments is in each case at least 25%, in particular at least 33%, in particular at least 50%, in particular at least 75%, of an axial length of the matrix pair of the respective segment. Additionally or alternatively, the axial length of the first matrix is in particular at most 75%, in particular at most 50%, in particular at most 33%, in particular at most 25% of the axial length of the matrix pair. For example, in one embodiment, the axial length of the first matrix is between ("at least") 25% and ("at most") 75% of the axial length of the matrix pair.

As a result of this division of the axial extensions between the first matrix and the matrix pair, in one embodiment the thermal and fluid dynamics can advantageously be varied, in particular optimized and the flow of the exhaust gas flowing through the outlet nozzle with the heat exchanger can be improved in terms of flow and / or heat technology.

In one embodiment, the second distributor space of the matrix pair of one or more segments and the third distributor space of this matrix pair are formed by a common chamber, in particular a common distributor tube. Additionally or alternatively, in one embodiment, the second distributor space of the matrix pair of one or more segments and the third distributor space of this matrix pair are fluidically separate from each other, in particular by separate distributor tubes.

In one embodiment, the second distributor space of the matrix pair of one or more segments and the first distributor space of the first matrix of the respective segment are formed by a common chamber, in particular a common distributor tube. Additionally or alternatively, in one embodiment, the second distributor space of the matrix pair of one or more segments and the first distributor space of the first matrix of the respective segment are fluidically separate from each other, in particular by separate distributor tubes.

In one embodiment, the second distributor space of the matrix pair of one or more segments and the second distributor space of the matrix pair of a segment adjacent in the circumferential direction are formed by a common chamber, in particular a common distributor tube. Additionally or alternatively, in one embodiment, the second distribution space of the matrix pair of one or more segments and the second distribution space of the matrix pair of a segment adjacent in the circumferential direction are fluidly separated from each other, in particular by separate distribution pipes.

In one embodiment, the second collecting space of the matrix pair of one or more segments and the third collecting space of this matrix pair are formed by a common chamber, in particular a common collecting tube. Additionally or alternatively, in one embodiment, the second plenum of the matrix pair of one or more segments and the third plenum of this matrix pair are fluidically separate from each other, in particular by separate collection tubes formed.

In one embodiment, the second collecting space of the matrix pair of one or more segments and the first collecting space of the first matrix of the respective segment is formed by a common chamber, in particular a common collecting tube. Additionally or alternatively, in one embodiment, the second collection space of the matrix pair of one or more segments and the first collection space of the first matrix of the respective Segments fluidly separate from each other, in particular by separate collection tubes formed.

In one embodiment, the second collecting space of the matrix pair of one or more segments and the second collecting space of the matrix pair of a segment adjacent in the circumferential direction are formed by a common chamber, in particular a common collecting tube. Additionally or alternatively, in one embodiment, the second collecting space of the matrix pair of one or more segments and the second collecting space of the matrix pair of a segment adjacent in the circumferential direction are fluidly separate from each other, in particular by mutually separate collecting tubes formed.

In one embodiment, the first distributor space of the first matrix of one or more segments and the first distributor space of the first matrix of a segment adjacent in the circumferential direction are formed by a common chamber, in particular a common distributor tube. Additionally or alternatively, in one embodiment, the first distribution space of the first matrix of one or more segments and the first distribution space of the first matrix of a circumferentially adjacent segment are fluidically separate from each other, in particular by separate distribution pipes formed.

In one embodiment, the first collecting space of the first matrix of one or more segments and the first collecting space of the first matrix of a segment adjacent in the circumferential direction are formed by a common chamber, in particular a common collecting tube. Additionally or alternatively, in one embodiment, the first plenum of the first matrix of one or more segments and the first plenum of the first matrix of a circumferentially adjacent segment are fluidically separate from each other, in particular by separate headers.

By a common design of collection or distribution chambers can be achieved in one embodiment, an advantageously compact design of these spaces. By a separate or separate formation of collection or distribution spaces can in one embodiment advantageously the thermal and fluid dynamics varies, in particular optimized and so the interaction of the exhaust nozzle flowing through the exhaust gas flow and / or heat technology can be improved with the heat exchanger.

In one embodiment, the second collecting space of the matrix pair of one or more segments in the circumferential direction, at least substantially, is arranged equidistantly between the first distributor space and the first collecting space of the first matrix of this segment. Additionally or alternatively, the third collecting space of the matrix pair is arranged in the circumferential direction, at least substantially, equidistantly between the first distributor space and the first collecting space. Additionally or alternatively, the second distribution space of the matrix pair of one or more segments is arranged in the circumferential direction, at least substantially equidistant between the first distribution space and the first collection space of the first matrix of this segment. Additionally or alternatively, the third distributor space of the matrix pair is arranged in the circumferential direction, at least substantially, equidistantly between the first distributor space and the first collection space.

Due to the equidistant distribution of the collection or distribution spaces in the circumferential direction, the interaction of the exhaust gas flowing through the outlet nozzle with the heat exchanger can advantageously be improved in terms of flow and / or heat technology in one embodiment.

In particular, if one or more segments are circular ring segments, in one embodiment the first collecting space, in a further development additionally or alternatively the second and / or third collecting space, of these segments, at least substantially, can extend in the radial direction. In particular, the passages can lead into this collecting space, at least substantially, in the circumferential direction. Additionally or alternatively, in one embodiment, the first distributor space, in a further embodiment additionally or alternatively, the second and / or third distributor space, of these segments, at least substantially, extend in the radial direction. In particular, the passages can open into this distributor space, at least substantially, in the circumferential direction.

In particular, if one or more segments are cone segments, in one embodiment, the first collecting space, in a further development additionally or alternatively, the second and / or third collecting space, these segments, at least substantially, extend in the axial direction. In particular, the passages can lead into this collecting space, at least substantially, in the circumferential direction. Additionally or alternatively, in one embodiment, the first distributor space, in a further development additionally or alternatively, the second and / or third distributor space, these segments, at least substantially, extend in the axial direction. In particular, the passages can open into this distributor space, at least substantially, in the circumferential direction.

In one embodiment, first passages of the first matrix and / or second and / or third passages of the matrix pair of one or more segments are formed by, in particular arcuate, tubes which are spaced from each other in the radial and / or axial direction. The tubes may in particular, at least substantially, have circular, elliptical or teardrop-shaped cross sections. Additionally or alternatively, in one embodiment, first passages of the first matrix and / or second and / or third passages of the matrix pair of one or more segments may be formed without feedback or looping. This can advantageously be increased throughput in the passages. Likewise, in one embodiment, first passages of the first matrix and / or second and / or third passages of the matrix pair of one or more segments may have feedback loops, in particular connect S and Z-like collecting and distributing space, in particular to each other to increase effective heat exchange distance.

In one embodiment, the heat exchange medium is air and the first and in a development, the second and third passages are air passages. In one embodiment, the distribution spaces, in particular via a common line or via separate lines, connected to an inlet for the extraction of compressed air before, in or after a compressor. Additionally or alternatively, in one embodiment, the collecting chambers, in particular via a common line or via separate lines, connected to an outlet for the supply of heated air before or into the combustion chamber.

In one embodiment, the first, in a further development, the second and third passages, in the operation of exhaust gas of the gas turbine flows around to transfer heat from the exhaust gas to the heat exchange medium flowing through them, in particular taken from the combustion chamber and returned air, or are set up or provided for this purpose.

Further advantageous developments of the present invention will become apparent from the dependent claims and the following description of preferred embodiments. This shows, partially schematized:

1 a quarter of a discharge nozzle of a gas turbine according to an embodiment of the present invention in a perspective contour representation;

2 a plan view in the axial or flow direction on a circular ring segment of a heat exchanger of a gas turbine according to a further embodiment of the present invention;

3 a quarter of a discharge nozzle of a gas turbine according to a further embodiment of the present invention in 1 corresponding representation; and

4 a perspective contour view of a conical segment of a heat exchanger of a gas turbine according to another embodiment of the present invention.

1 shows a quarter of a rotationally symmetrical outlet nozzle 1 a gas turbine according to an embodiment of the present invention, in which a heat exchanger is arranged, in a perspective contour representation. The remaining three quarters are symmetrical.

The heat exchanger has eight annular segments which extend in the radial direction, and of which 1 two axially spaced annular segments 20 . 30 you can see.

As can be seen from the above-described rotational symmetry or representative quarter diagram, the four circumferentially adjacent segments extend 20 and the four circumferentially adjacent segments 30 each in the circumferential direction together over 360 °, these two stages, each with four circumferentially adjacent segments 20 respectively. 30 are spaced in the axial direction.

The circular ring segments 20 . 30 the heat exchanger of the 1 each extending from a radially outer Gaskanalmantelfäche the outlet nozzle to a longitudinal axis of the outlet nozzle.

2 shows a plan view in the axial or flow direction (from left to right in 1 ) to a ring segment of a heat exchanger of a gas turbine according to a further embodiment of the present invention, which is arranged in the outlet nozzle of the gas turbine.

In this embodiment, the circular ring segments extend 20 . 30 of the heat exchanger in each case from a radially outer gas channel jacket surface of the outlet nozzle to a radially inner gas channel jacket surface of the outlet nozzle. Incidentally, both versions are in agreement, so that both are explained together and on this 1 . 2 referred to together.

Each of the circular ring segments 20 . 30 points as in 2 indicated, each a first matrix 21 with first passages in the form of arcuate and non-return, axially and radially spaced tubes (not shown) having a first distribution space 22 to (in 2 indicated by an arrow) supplying air to be heated from a compressor (not shown) of the gas turbine in the first passages with a circumferentially spaced first plenum 23 to (in 2 indicated by an arrow) connecting heated air from the first passages, which is a combustion chamber (not shown) of the gas turbine is supplied.

In the radial direction outside next to the first matrix is in each case a matrix pair with a second matrix 24 with second passages in the form of arcuate and non-return, axially and radially spaced tubes (not shown), the second distribution space 25 to (in 2 indicated by an arrow) supplying air to be heated from the compressor into the second passages with a circumferentially spaced second plenum 26 to (in 2 indicated by an arrow) connecting heated air for the combustion chamber from the second passages, and with a third matrix 27 arranged with third passages in the form of arcuate and non-return, axially and radially spaced tubes (not shown) having a third distribution space 28 to (in 2 indicated by an arrow) supplying air to be heated from the compressor in the third passages with a third spaced collecting space in the circumferential direction 26 to (in 2 indicated by an arrow) connecting heated air for the combustion chamber from the third passages, the second and third collection chambers communicating through a common chamber 26 formed and equidistant in the circumferential direction between the first distributor space 22 and the first collection room 23 are arranged.

A radial height of the first matrix 21 is in the remarks of 1 . 2 less than 50% of a radial height of the matrix pair 24 . 27 ,

The collection and distribution rooms 22 . 23 . 25 . 26 and 28 extend in the radial direction. Here are the second distribution room 25 and the first distribution room 22 formed separately from each other. Similarly, third are collection space 28 the first collection room 23 formed separately from each other.

3 shows in 1 corresponding representation of a quarter of a rotationally symmetrical outlet nozzle 1 a gas turbine according to another embodiment of the present invention, in which a heat exchanger is arranged. The remaining three quarters are again symmetrical.

Corresponding features are identified by identical reference numerals, so that reference is made to the description of the other embodiments and will be discussed below only differences.

In the execution of 3 the heat exchanger has four conical segments converging in the direction of flow 40 which are adjacent in the circumferential direction and each extending from a radially outer Gaskanalmantelfäche the outlet nozzle to a radially inner Gaskanalmantelfäche the outlet nozzle and together over 360 °.

Each of the cone segments 40 Each has a first matrix with first passages in the form of arcuate and non-return, axially and radially spaced tubes (not shown) having a first distribution space 42 to (in 3 indicated by an arrow) supplying air to be heated from a compressor (not shown) of the gas turbine in the first passages with a circumferentially spaced first plenum 43 to (in 2 indicated by an arrow) connecting heated air from the first passages, which is a combustion chamber (not shown) of the gas turbine is supplied. The collection rooms 42 and 43 extend in the axial direction.

4 shows in a perspective contour view of a conical segment of a heat exchanger of a gas turbine according to another embodiment of the present invention, which is arranged in the outlet nozzle of the gas turbine.

In this embodiment, in the axial direction upstream of the first matrix 41 with the first distributor space connected through it 42 and first collection room 43 one matrix pair each with a second matrix 44 with second passages in the form of arcuate and non-return, axially and radially spaced tubes (not shown) having a second distribution space 45 to (in 2 indicated by an arrow) supplying air to be heated from the compressor into the second passages with a circumferentially spaced second plenum 46 to (in 2 indicated by an arrow) connecting heated air for the combustion chamber from the second passages, and with a third matrix 47 arranged with third passages in the form of arcuate and non-return, axially and radially spaced tubes (not shown) having a third distribution space 48 to (in 2 indicated by an arrow) supplying air to be heated from the compressor in the third passages with a third spaced collecting space in the circumferential direction 46 to (in 2 indicated by an arrow) connecting heated air for the combustion chamber from the third passages, the second and third collection chambers communicating through a common chamber 46 formed and equidistant in the circumferential direction between the first distributor space 42 and the first collection room 43 are arranged.

An axial length of the first matrix 41 is in the remarks of 4 more than 50% of an axial length of the matrix pair 44 . 47 ,

The collection and distribution rooms 42 . 43 . 45 . 46 and 48 extend in the axial direction. Here are the second distribution room 45 and the first distribution room 42 formed separately from each other. Likewise, the third distribution room 48 and the first collection room 43 formed separately from each other.

Incidentally, both versions are in agreement, so that both are explained together and on this 3 . 4 referred to together.

Although exemplary embodiments have been explained in the foregoing description, it should be understood that a variety of modifications are possible.

Thus, in particular collecting and distribution spaces can be reversed compared to the illustrated embodiments. Additionally or alternatively, the first matrix 21 of the circular ring segment radially outward or the first matrix 41 of the cone segment downstream of the matrix pair 24 . 27 respectively. 44 . 47 be arranged and / or the ratio of the radial heights or axial lengths differently, in particular be the other way around. Additionally or alternatively, one or more of the rooms ( 22 . 25 ) 23 . 28 ) 42 . 45 ) and ( 43 . 48 ) may be formed by a common chamber. Additionally or alternatively, the second and third collection (or distribution) spaces, separately from each other, in particular by separate collection (or distribution) pipes may be formed. Additionally or alternatively, one or more of the collection or distribution spaces 22 . 25 . 23 . 28 . 42 . 45 . 43 and 48 with the corresponding collection or distribution space of a circumferentially adjacent, in 1 to 4 Segments not shown may be formed by a common chamber or separately from each other.

It should also be noted that the exemplary embodiments are merely examples that are not intended to limit the scope, applications and construction in any way. Rather, the expert is given by the preceding description, a guide for the implementation of at least one exemplary embodiment, with various changes, in particular with regard to the function and arrangement of the components described, can be made without departing from the scope, as it turns out according to the claims and these equivalent combinations of features.

LIST OF REFERENCE NUMBERS

1

exhaust nozzle

20, 30

Heat exchanger Kreisringsegement

40

Heat exchanger Kegelsegement

21; 41

first matrix

22; 42

first distribution room

23; 43

first collection room

24; 44

second matrix

25; 45

second distribution room

26; 46

second and third collection room

27; 47

third matrix

28; 48

third distribution room

Claims (13)

Gas turbine with a heat exchanger, wherein the heat exchanger at least one segment ( 20 . 30 ; 40 ) with a first matrix ( 21 ; 41 ) having first passages comprising a first distribution space ( 22 ; 42 ) for supplying heat exchange medium to be heated into the first passages with a circumferentially spaced first collecting space ( 23 ; 43 ) for discharging heated heat exchange medium from the first passages; characterized in that the heat exchanger in an outlet nozzle ( 1 ) of the gas turbine, wherein the segment ( 20 . 30 ; 40 ) a matrix pair with a second matrix ( 24 ; 44 ) with second passages which have a second distribution space ( 25 ; 45 ) for supplying the heat exchange medium to be heated into the second passages with a circumferentially spaced second collecting space ( 26 ; 46 ) for discharging heated heat exchange medium from the second passages, and with a third matrix ( 27 ; 47 ) having third passages, which has a third distribution space ( 28 ; 48 ) for supplying heat exchange medium to be heated in the third passages with a circumferentially spaced third collecting space ( 26 ; 46 ) for discharging heated heat exchange medium from the third passages, wherein the second and third collection space ( 26 ; 46 ) in the circumferential direction between the first distributor space ( 22 ; 42 ) and the first collection room ( 23 ; 43 ) is arranged. Gas turbine according to claim 1, characterized in that the first matrix ( 21 ; 41 ) at least one segment ( 20 . 30 ; 40 ) in the radial direction inside or outside next to the matrix pair of this segment ( 20 . 30 ; 40 ) is arranged and with this a circular segment ( 20 . 30 ), which extends, at least substantially, in the radial direction. Gas turbine according to the preceding claim, characterized in that a radial height of the first matrix of the segment ( 20 . 30 ; 40 ) at least 25% or at most 50% of a radial height of the matrix pair of this segment ( 20 . 30 ; 40 ) is. Gas turbine according to claim 1, characterized in that the first matrix ( 21 ; 41 ) at least one segment ( 20 . 30 ; 40 ) in the axial direction downstream or upstream adjacent to the matrix pair of this segment ( 20 . 30 ; 40 ) is arranged and with this matrix pair a converging in the flow direction cone segment ( 40 ). Gas turbine according to the preceding claim, characterized in that an axial length of the first matrix ( 21 ; 41 ) of the segment ( 20 . 30 ; 40 ) at least 25% or at most 50% of an axial length of the matrix pair of this segment ( 20 . 30 ; 40 ) is. Gas turbine according to one of the preceding claims, characterized in that the second and / or third collection or distribution space ( 25 ; 45 ; 28 ; 48 ; 26 ; 46 ) of the matrix pair of at least one segment ( 20 . 30 ; 40 ) in the circumferential direction, at least substantially, equidistant between the first distributor space ( 22 ; 42 ) and the first collection room ( 23 ; 43 ) of the first matrix ( 21 ; 41 ) of this segment ( 20 . 30 ; 40 ) is arranged. Gas turbine according to one of the preceding claims, characterized in that at least one collecting and / or distribution space ( 22 ; 42 ; 23 ; 43 ; 25 ; 45 ; 28 ; 48 ; 26 ; 46 ) of the segment ( 20 . 30 ; 40 ) extends, at least substantially, in the radial or axial direction. Gas turbine with a heat exchanger, wherein the heat exchanger at least one segment ( 20 . 30 ; 40 ) with a first matrix ( 21 ; 41 ) having first passages comprising a first distribution space ( 22 ; 42 ) for supplying heat exchange medium to be heated into the first passages with a circumferentially spaced first collecting space ( 23 ; 43 ) for discharging heated heat exchange medium from the first passages; characterized in that the heat exchanger in an outlet nozzle ( 1 ) of the gas turbine, wherein the segment is a converging in the flow direction cone segment ( 40 ). Gas turbine according to one of the preceding claims, characterized in that passages of the first matrix ( 21 ; 41 ) and / or the matrix pair of at least one segment ( 20 . 30 ; 40 ) are formed by tubes which are spaced from each other in the radial and / or axial direction. Gas turbine according to one of the preceding claims, characterized in that the segment ( 20 . 30 ; 40 ) extends in the circumferential direction, at least substantially, over 360 °, or at least two circumferentially adjacent segments ( 20 . 30 ; 40 ) extend circumferentially together, at least substantially, over 360 °. Gas turbine according to one of the preceding claims, characterized in that at least two of the segments ( 20 . 30 ) are spaced in the axial direction. Gas turbine according to one of the preceding claims, characterized in that the segment ( 20 . 30 ; 40 ), at least substantially, from a radially outer gas channel jacket surface of the outlet nozzle ( 1 ) to a radially inner gas channel jacket surface or a longitudinal axis of the outlet nozzle ( 1 ). Gas turbine according to one of the preceding claims, characterized in that the heat exchange medium is air and the passages are air passages.

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