EP4090836A1 - Verfahren zum anpassen einer turbinenanordnung, verkleidung, satz mit mehreren verkleidungen, verwendung und diffusor - Google Patents
Verfahren zum anpassen einer turbinenanordnung, verkleidung, satz mit mehreren verkleidungen, verwendung und diffusorInfo
- Publication number
- EP4090836A1 EP4090836A1 EP21711746.4A EP21711746A EP4090836A1 EP 4090836 A1 EP4090836 A1 EP 4090836A1 EP 21711746 A EP21711746 A EP 21711746A EP 4090836 A1 EP4090836 A1 EP 4090836A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support strut
- cladding
- side wall
- original support
- original
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/30—Exhaust heads, chambers, or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
- F01D5/145—Means for influencing boundary layers or secondary circulations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
- F05D2240/121—Fluid guiding means, e.g. vanes related to the leading edge of a stator vane
Definitions
- the invention relates to a method for adapting a turbine arrangement designed for a first operating parameter range, in particular a load range, in particular a gas turbine arrangement, to a second operating parameter range, in particular a load range.
- the invention relates to a cladding for a support strut of a diffuser of a turbine diameter, a set with two or more differently trained th such claddings, the use of such a Ver cladding or such a set of cladding and egg NEN diffuser for a turbine assembly.
- a power plant that is characterized by a design optimized for full load operation, in particular is designed in such a way that particularly good or the best efficiency is achieved under full load, is characterized in part load operation. usually drove out due to poorer performance. In particular in the event that partial load operation subsequently becomes a dominant operating mode, it can be economically attractive to improve the efficiency for the partial load range, even if this involves the compromise that a reduction in the original full load efficiency or the Full-load nominal power occurs.
- This object is achieved by a method for adapting a turbine arrangement designed for a first operating parameter, in particular load range, to a second operating parameter, in particular load range, in which a turbine arrangement with a diffuser is provided, the diffuser having an outer and an inner loading boundary wall, between which an annular flow channel is formed, and a plurality of the outer and in nere boundary wall interconnecting support struts, and a panel is preferably detachably attached to at least one of the support struts in order to obtain at least one adapted support strut, the cladding is designed and arranged in such a way that the at least one adapted support strut extends at least in sections through a At least one original support strut is characterized by a modified outer geometry.
- the invention also relates to a diffuser for a turbine arrangement, in particular a gas turbine arrangement, which comprises an outer and an inner boundary wall, between which an annular flow channel is formed, and a plurality of support struts connecting the outer and inner boundary wall, and a cladding for carrying out the invention Method, which is in particular releasably attached to one of the support struts, preferably several Ver claddings for performing the method according to the invention, one of which is in particular releasably attached to one of the support struts.
- the invention also relates to the use of the paneling according to the invention or a set of paneling according to the invention when carrying out the method according to the invention.
- the basic idea of the present invention is to adapt a turbine power plant to other operating conditions, for example when changing from operation in a full load to operation in a partial load range, by adding the outer geometry of at least one support strut, preferably several, especially before given to all support struts of a diffuser of such adap benefits.
- a diffuser of a turbine arrangement can, for example, be arranged downstream of a turbine stage, for example the last turbine stage, in a manner that is well known in advance of the arrangement serve to set the desired pressure and temperature conditions of the working medium.
- the outer geometry of the support struts of the diffuser influences the flow in or through the annular flow channel of this, which is why it is also possible to speak of a flow geometry or a flow cross section of the support struts. It has been shown that a change in the geometry of the diffuser struts is a particularly suitable, advantageous measure in response to changed operating conditions, such as a change from full to partial load operation, which ensures better performance under the changed conditions can be.
- the adaptation of the outer geometry of one or more diffuser support struts is achieved according to the invention in that at least one, in particular several, particularly preferably all of the original, existing support struts is or will be provided with a covering. It has been found that the outer geometry of the diffuser support strut (s) influencing the flow can be adapted to other operating conditions in a particularly simple manner, if necessary only temporarily, by means of a cladding.
- the first operating parameter range preferably comprises a full load range or is formed thereby
- the second operating parameter range preferably comprises a partial load range or is formed thereby.
- Full load operation can be understood to mean operation with the maximum possible mass flow, in particular at the turbine outlet and / or under standard (ISO) ambient conditions.
- full load operation for example, operation from a high to one or the maximum possible mass flow, in particular at the turbine outlet and / or under standard (ISO) ambient conditions, up to the maximum possible mass flow, in particular at the turbine outlet and / or at Stan dard (ISO) environmental conditions.
- a full load range can be, for example, from 75% to 100% or 85% to 100% or 95% to 100% of the maximum possible mass flow, especially at the turbine outlet and / or under standard (ISO) ambient conditions.
- a part-load range is in particular an area that does not include full-load operation. For example, it can be a range extending from 30% to 60% or 65% to 75% or 65% to 85% of the maximum possible mass flow, in particular at the turbine outlet and / or under standard (ISO) ambient conditions.
- the first operating parameter range in particular the load range
- the second operating parameter range in particular the load range.
- a partial overlap of the two areas cannot be ruled out.
- the fact that the turbine arrangement is designed for a first operating parameter, in particular load range, means in particular or includes in particular that the diffuser is designed for the first operating parameter, in particular load range.
- a diffuser designed for a range of operating parameters preferably has support struts, the outer geometry of which is adapted to this range of operating parameters.
- the respective cladding that is provided according to the invention is expediently designed and is expediently arranged on the respective original support strut in such a way that an outer geometry adapted to the second operating parameter range is obtained.
- An external geometry adapted to the second operating parameter range is preferably to be understood as one with which in the second parameter range compared to an operation in this area with the original support strut external geometry, i.e. without the cladding (s), a better performance, such as higher performance and / or higher efficiency, can be achieved or is achieved.
- the geometry adaptation achieved with the (respective) cladding is such that the best performance, for example the best possible performance and / or the best possible efficiency, is guaranteed in the second operating parameter range.
- An improvement, for example of a few percent or even less than one percent, can, however, be sufficient and it can depend on the individual application how large this should be or is selected.
- the respective cladding is preferably designed in such a way and is preferably arranged on the respective original support strut that an external geometry is obtained which - in comparison with the external geometry of the respective original support strut - is better for the turbine outlet flow in the second operating parameter range, for example a partial load range, is suitable.
- the turbine outlet flow is in particular the flow emerging from the last turbine stage upstream of the diffuser in the flow direction.
- the respective cladding is designed and arranged on the respective original support strut in such a way that an external geometry is obtained that at least in sections has a curvature that - compared to External geometry of the respective original support strut - offers improved tolerance to varying angles of inflow and the development of flow separations.
- the procedure according to the invention makes it possible to adapt the flow geometry of diffuser support struts to changed operating conditions with surprisingly simple means, thus achieving improved performance under changed conditions.
- a diffuser which, due to the original flow geometry of its support struts, shows a good or the best performance in full-load operation can be achieved by the oversight according to the invention one or more, preferably all of its support struts with a cladding can be quickly and with little effort, for example as part of an operating break that is provided anyway, adapted to their operating parameter range, such as partial load operation, or optimized for this.
- the invention is also based on the knowledge that there is no outer support strut geometry that enables a uniform performance improvement, such as an increase in efficiency and / or performance over all operating points, or which does not cause any deterioration at any operating point - compared to another geometry.
- the invention overcomes this problem in that it creates a possibility of being able to change the geometry with little effort, so that in each operating area it is possible to work specifically with a geometry that shows better performance under the associated specific conditions.
- At least one, preferably all diffuser support struts could then, for example, be provided with clothing in the autumn during a short downtime in the manner according to the invention in order to improve the part-load efficiency in the part-load period.
- the panel (s) could be removed again in order to return to the optimal design for full load operation.
- Another advantage of the solution according to the invention is that it does not have any moving parts. The production and installation of the panels is associated with comparatively low expenditure of time and money and the panels have, if at all, little maintenance. The economic attractiveness is also due to the fact that no cutting or welding in large dimensions is neces sary. No change to the structural integrity of the original diffuser is required.
- the cladding is releasably fastened to the at least one original support strut be.
- the geometry adaptation according to the invention can then also be reversed in a particularly simple manner in order to return to the original flow geometry of the support struts and thus the design for the original operating parameter range or to switch to another cladding for yet another parameter range. This makes it possible, in particular, to be able to work with good performance in a particularly flexible manner both in the first operating parameter range and in the second operating parameter range - and possibly also in further operating parameter ranges.
- the or the respective original support strut expediently remains intact and functional underneath the respective cladding and receives only minor modifications, in particular to enable the preferably detachable fastening of the cladding (s).
- the provision of anchoring points and / or threaded holes and / or inserts provided with internal threads is mentioned.
- the or the respective cladding can be constructed in one or more parts, in other words comprise two or more parts.
- the several parts of the cladding successively preferably releasably attached to the or the respective ur sprünlichen support strut.
- a multi-part cladding has proven itself, for example, in the case that the flow channel defined by the diffuser is characterized by a diameter that increases in the downstream direction. If one looks into the diffuser in the downstream direction, the support or the respective support strut then extends, in other words, also into an overlapping area in which a cover cannot be provided by a movement in the axial direction alone. Then, for example, a three-part cladding can be used, a first part then being pushed onto the support strut in the axial direction and then being moved in the radial direction, previously coming into contact with the outer wall of the diffuser.
- a second part of the cladding can then be inserted correspondingly, but shifted in the opposite radial direction until it comes into contact with the inner wall of the diffuser. Finally, the remaining free space between the first and the second part can be filled by a third cladding part, which can be used in a form-fitting manner at the corresponding point.
- a multi-part cladding can also be used, for example, if both a change in geometry in the area of the front edge and a change in geometry in the area of the rear edge is desired or necessary, but areas in between can or should remain unclad. Then, for example, at least part of the cladding can be arranged in the area of the front edge of the original support strut and preferably releasably fixed, and at least a part in the area of the rear edge of the original support strut.
- any means previously known from the prior art can in principle be used for the preferably detachable fastening of the respective cladding.
- the or those respective cladding can be preferably releasably attached to the (respective) support strut, for example by means of bolts and / or screws and / or clamps and / or pins and / or locking elements.
- the respective original support strut for example, can be provided with inserts or bores into which, for example, threaded bolts can be used.
- the or the respective cladding can, for example, have holes through which fastening elements, some screws and / or bolts, extend in the assembled state.
- the or the respective cladding has a varying wall thickness, at least in sections. It can range, for example, in one or those Endbe in or with which it rests against the or respective ur nal support strut 5, for example with the end region or regions pointing away from the front edge, have a wall thickness decreasing towards the end. This enables a particularly smooth transition from the cladding to the original support strut without an edge. It can also be that in such an end area with decreasing wall thickness means for fastening the (respective) cladding to the (respective) original support strut are provided.
- the angle of the diffuser support struts or their front edges, in particular with respect to the working medium flowing through the flow channel during operation, can be changed in order to better match the turbine outlet flow in another Operating parameter range, such as partial load operation, to be brought into agreement.
- the angle can be adjusted by 20 ° or more.
- a (respective) first cladding can be designed and arranged on the (respective) original support strut so that a first angle adjustment of, for example, 20 ° is implemented in order to achieve good / optimal performance in the second operating parameter range. If the operating parameter area changes again, not back to the first area, for which the original external geometry is particularly suitable, but to a third area, a (respective) second cladding can be designed in this way and arranged on the (respective) original support strut be that another angle adjustment of, for example, 10 ° is realized.
- At least one set of several different claddings according to the invention can then be provided or used here.
- a set of this type is expediently provided or used for each diffuser support strut, so that in each case all support struts can be provided with a cladding of one design.
- Another embodiment is characterized in that the cladding is designed and arranged on the at least one original support strut that the cladding overlaps at least in sections the front edge of the at least one original support strut and at least in sections forms the front edge of the at least one adapted support strut.
- the formed by the or the respective cladding in front of derkante, ie the front edge of the or the respective adap-oriented support strut, is preferably wider than the front edge of the respective original support strut located behind it.
- it can have a larger diameter than the front edge of the (respective) original support strut located behind it.
- the cladding does not overlap the front edge over its entire extent, but only in sections, it can accordingly apply that the front edge section formed by the cladding is wider than the front edge section of the at least one original support strut lying behind.
- the new front edge of the at least one adapted support strut which is present after the respective cladding has been provided, is located in a different position than the front edge of the at least one original support strut.
- the at least one original support strut can be distinguished by an aerodynamic outer geometry.
- the cladding is expediently designed and arranged on the at least one original support strut in such a way that the resulting at least one support strut is also characterized by an aerodynamic outer geometry.
- the or the respective original support strut can - just like the or the respective adapted support strut - have a pressure side wall and a suction side wall which extend in an axial direction from a front edge to a downstream rear edge of the or the respective original union support strut.
- the cladding is designed and arranged on the at least one original support strut that it extends at least over a portion of the pressure side wall of the at least one original support strut and at least a portion of the pressure side wall of the at least forms an adapted support strut.
- the cladding can be designed in such a way and arranged on the at least one original support strut that it extends at least over a portion of the suction side wall of the at least one original support strut and forms at least a portion of the suction side wall of the at least one adapted support strut.
- the cladding is designed in such a way and is arranged on the at least one original support strut that the cladding or at least part of it extends in the axial direction over a larger section of the suction side wall of the at least one original support strut extends than in the axial direction over the pressure side wall of the at least egg NEN original support strut. Then, in other words, the outer geometry on the suction side wall by means of the dressing or part of it is changed over a larger area than on the pressure side, which has proven to be particularly advantageous.
- the cladding or at least part of the cladding on the suction wall side can extend in the axial direction over at least 30%, in particular at least 40%, preferably at least 50% of the total extent of the support strut in the axial direction and / or on the pressure wall side in the axial direction over a maximum of 20%, in particular extend at most 10%, preferably at most 5% of the total extent of the support strut in the axial direction.
- the cladding, viewed in section is characterized, at least in sections, by a J-shape.
- a multi-part cladding it can also be provided, for example, that at least a part of the cladding, viewed in section, is characterized by a J-shape.
- a constellation can be implemented particularly easily in which the cladding or the cladding part extends further over one side than the other of the belonging original support strut extends.
- the cladding or at least part of this can be given for example by at least one bent sheet metal, insbesonde re sheet metal. Conventional methods can be used or have been used for shaping. It is also possible that a cladding obtained by a generative manufacturing process, for example by 3D printing, or at least one cladding part obtained in this way is used. A combination of different manufacturing processes for different parts or sections of a cladding are also conceivable.
- the cladding is designed and arranged on the at least one original support strut that the Ver cladding or at least a part of this the suction side wall and / or the pressure side wall over the front edge of the at least one original support strut extended to the front.
- the cladding is designed and arranged on the at least one original support strut that the cladding or at least a part of it the suction side wall and / or the pressure side wall over the rear edge of the little At least one of the original support struts was extended backwards.
- the cladding is designed and arranged on the at least one support strut that the cladding extends at least in sections at least substantially parallel to a section of the suction side wall and / or the pressure side wall which extends at least one original support strut .
- the cladding of the formed is arranged on the least one original support strut that the angle enclosed between the pressure side wall of the at least one adapted support strut and the suction side wall of the at least one adapted support strut is smaller than that Angle between the pressure side wall of the at least one original support strut and the suction side wall of the at least one original support strut is included.
- a flow geometry is obtained that is characterized by a pressure and suction side wall that is - in comparison with the geometry of the original support strut - by a parallel orientation distinguish.
- the at least one original support strut is characterized by a suction side wall that is curved at least in sections
- the cladding is designed and arranged on the at least one original support strut in such a way that the at least one adapted support strut is characterized by a suction side wall that is curved at least in sections , wherein the curvature of the suction side wall of the at least one adapted support strut is at least partially different from the curvature of the suction side wall of the at least one original support strut.
- the at least one original support strut is characterized by a pressure side wall that is curved at least in sections and the cladding is designed in such a way and on which at least one original support strut is arranged that the at least one adapted support strut extends through at least one section curved pressure side wall, wherein the curvature of the pressure side wall of the at least one adapted support strut is at least partially different from the curvature of the pressure side wall of the at least one original support strut.
- Another advantageous embodiment is further characterized in that the cladding is designed and arranged on the at least one original support strut that at least one cavity is closed between the cladding and the at least one original support strut.
- the flow behavior it depends on the outer contour and not on whether there is solid material or one or more cavities underneath. In the latter case, material can be saved.
- a cladding of one or, in the case of a multi-part design also comprises two or more, in particular, curved metal sheets, which are only partially abutted, for example with their end regions, on the respective original support strut and are preferably detachable with it are connected and thus the largest tteils spaced from the or he respective original Chen support strut extend.
- the respective originally intended support strut does not have to represent an element fully filled with material, but can be hollow - at least in sections.
- the original support strut or original support struts can, for example, comprise a support structure, which in turn have been provided with a lining in order to obtain a closed surface facing the flow channel.
- the respective cladding according to the invention for the external geometry would be preferably detachably fixed to the existing, original cladding of the respective original support strut. Then - at least from sections - two panels are provided one above the other.
- the at least one original support strut is characterized by a cross-section that remains constant in the radial direction and the cladding is designed and arranged on the at least one original support strut that the at least one adapted support strut extends through an in radial direction varying cross-section.
- an original support strut is characterized by a front edge whose width / diameter remains constant in the radial direction, and the cladding is designed and arranged in such a way that the resulting adapted support strut is characterized by a front edge whose width or diameter in the radia Ler direction varies at least in sections.
- an adapted support strut can be obtained in which the width or the diameter of the front edge and / or the rear edge increases or decreases in the radial direction from the outer to the inner boundary wall of the diffuser - at least over a section.
- cross section varies in the radial direction is to be understood in particular as the fact that it is not constant over the entire extent in the radial direction, but that it varies at least over a section in this direction.
- the at least one original support strut is characterized by a cross-section that varies in the radial direction and the cladding is formed in such a way and on the at least one original support strut is arranged that the resulting at least one adapted support strut passes through one in radial Direction of constant cross-section.
- the original support strut can have a front derkante and / or rear edge whose width or diameter in the radial direction from the outer towards the inner boundary wall of the diffuser - at least over a portion - increases or decreases and by means of the cladding a in the radial direction constant width of the front and / or rear edge can be achieved.
- a suitable design and arrangement of the respective cladding - or, in the case of a set with several claddings, the various designed cladding conditions for different parameter ranges - can be determined, for example, by means of computer-aided simulations.
- CFD simulations can be used, for example, to determine the efficiency of a specific or several different support strut external geometries.
- the abbreviation CFD stands for Computational Fluid Dynamics, translated into German: numerical fluid mechanics.
- a digital twin of a turbine arrangement it is also possible to use a digital twin of a turbine arrangement to be modified or a power plant with one.
- the support struts of the diffuser of the digital twin can then, for example - in the simulation - be provided with cladding according to the invention and the operating behavior or performance can be examined.
- simulations for different cladding can be carried out and the results can be compared with one another.
- a suitable point in time for attaching the cladding is determined will.
- Targeted planning can follow when the adaptation according to the invention takes place or when the adaptations according to the invention take place.
- a digital twin and historical operating parameters of the turbine arrangement to be adapted can be provided and the digital twin can be calibrated with the historical operating data.
- the calibrated digital twin can then be adapted in such a way that at least one support strut of its diffuser is an adapted support strut provided with a cladding, preferably all support struts are adapted support struts.
- hypothetical operating data can be simulated.
- Operating points can be found at which better performance, in particular better performance and / or efficiency, was achieved with the diffuser with the original support struts without cladding, and operating points can be found at which the diffuser with at least one adapted support strut a better performance, in particular better performance and / or efficiency, he was aiming for. It can be specified how long a downtime is required for attaching and / or changing and / or removing the cladding and / or whether there are other downtimes and / or how long the total downtime permitted per year is. This information can be provided as input for the simulation.
- case constellations can be simulated, which result from a different number of times the cladding is attached and / or changed and / or removed and / or different combinations of different cladding (s) and / or different times of attachment and / or changing and / or removing the cladding (s).
- that case constellation can be determined in which the best overall performance of the turbine arrangement is achieved, in particular over the entire period of time over which the historical operating data extend.
- the procedure can be based on this case constellation determined by simulation.
- a suitable number and a suitable timing in other words a planning for cladding attachment or cladding replacement or cladding removal downtimes, can be obtained, according to which the procedure is then followed.
- Figure 1 is a perspective view of a diffuser of a turbine arrangement
- FIG. 2 shows a sectional view of one of the support struts of the diffuser from FIG. 1, the support strut being provided with a two-part cladding,
- FIG. 3 shows the view of the diffuser according to FIG. 1, one of the support struts being provided with a cladding,
- FIG. 4 side views of the support strut provided with the cladding from FIG. 3,
- FIG. 5 shows a first section through a support strut on which a cladding with a cross-section that varies in the radial direction is attached
- FIG. 6 shows a second section through the support strut and cladding from FIG. 5,
- FIG. 7 shows a first section through a support strut with a cross-section that varies in the radial direction, to which a cover is attached, the cross-section of which does not change in the radial direction,
- FIG. 8 shows a second section through the support strut and cladding from FIG. 7,
- FIG. 9 side views of a support strut to which an integral cladding is attached
- FIG. 10 side views of a support strut to which a two-part cladding is attached, one cladding part overlapping the front and the other cladding part the rear edge of the supporting strut,
- FIG. 11 shows a graph with simulation data showing an increase in efficiency associated with the invention.
- FIG. 12 shows a purely schematic block diagram with exemplary steps for obtaining a plan for attaching and / or changing and / or removing the cladding on diffuser support struts.
- FIG. 1 shows a diffuser 1 of a turbine arrangement (not further illustrated) of a gas turbine of a gas turbine power plant. This can, for example, be arranged downstream of the last turbine stages and serve to set the desired pressure and temperature conditions of the working medium.
- the diffuser 1 comprises an outer and an inner limiter wall 2, 3, between which an annular flow channel 4 is formed, and several support struts 5, which connect the outer 2 and inner boundary wall 3 to each other. In the example shown, a total of five support struts 5 are present, which are arranged equidistantly from one another in the circumferential direction.
- the diffuser 1 comprises an outer 6 and inner ring-shaped element 7, which are connected to each other via the support struts 5 and the inner wall of the outer ring element 6 forms the outer boundary wall 2 delimiting the ring channel 4 on the outside and the outer wall of the inner ring element Mentes 7 forms the inner boundary wall 3 which delimits the flow channel 4 on the inside.
- the inner ring element 7 is in the present case cylindrical and is characterized by a diameter that is constant in the axial direction.
- the outer ring gelement 6, however, is conical. Specifically, the diameter takes this in the downstream axial direction (in Figure 1 to the top right).
- the annular channel 4 also widens accordingly in the downstream axial direction.
- the flow channel 4 defined by the diffuser 1 forms a section of the entire flow channel of the turbine arrangement, not shown further.
- the diffuser 1 when the diffuser 1 is mounted in the turbine arrangement, further elements of upstream and downstream components or stages are connected to its two end faces in a well-known manner, which results in the overall channel.
- the support struts 5 each have a pressure side wall 8 and a suction side wall 9, which extend in an axial direction from a front edge 10 to a downstream rear edge 11 of the respective support strut 5.
- FIG. 2 shows a cross-sectional view of the support struts 5 of the diffuser 1 from FIG.
- the five support struts 5 are all structurally identical, so that FIG. 2 shows a section of all of these by way of example.
- the support struts 5 are hollow. They are also characterized by an aerodynamic outer geometry. Both the pressure side wall 8 and the suction side wall 9 of the respective support strut 5 are not flat but curved.
- the shape of the support struts 5 is designed for a first operating parameter range, in other words, it is designed or designed.
- the first operating parameter range is given by a full load range, here the range that is above 75% of the turbine output mass flow that would be expected at full power under standard (ISO) ambient conditions. This is to be understood purely as an example.
- a power plant that is characterized by a design optimized for full load operation, in particular is designed in such a way that particularly good or the best performance, such as power and / or efficiency, is achieved under full load, is usually characterized by ei in partial load operation ne worse performance. In the event that part-load operation subsequently becomes a dominant operating mode, it can be economically attractive to improve the efficiency for the part-load range.
- the turbine arrangement is provided with the diffuser 1 shown in Figure 1 and there is a cladding 12 releasably attached to all five of the support struts 5 of the diffuser 1 in order to obtain adapted support struts 13, the cladding 12 are each designed in such a way and are arranged on the respective support strut 5 that the respectively resulting adapted support strut 13 is characterized, at least in sections, by an outer geometry that is changed in comparison to the at least one original support strut 5.
- the used panels 12 are each formed in several parts. Every Covering specifically comprises two covering parts 12a, 12b, which are each given by a bent sheet metal. At the parts 12a, 12b have a J-shaped cross section. This can be seen well in the sectional view according to FIG. It should be noted that the section shown in Figure 2, as can be seen in Figure 4, which shows the support strut 5 with cladding 12 attached to it from both sides, through the upper area of the adapted support strut 13 comprising the cladding 12 goes. Correspondingly, FIG. 2 shows a section through the upper lining part 12a. The lower part 12b has the same cross-sectional shape.
- FIG. 3 the cladding 12 is also shown, where it is indicated schematically with a dashed line, for illustration also that area of this which is covered by the outer ring element 6.
- FIG. 3 - as an example for all support struts 5 - a cladding 12 is shown on one of the struts 5.
- the ge showed diffuser with on the original support struts 5 in front of panels 12 is an embodiment of a diffuser according to the invention.
- the multi-part, in the present case two-part design of the cladding 12 takes into account the fact that the flow channel 4 widens in the direction of flow.
- initially only one part, here specifically the upper part 12a in FIG be pushed and then pushed in the radial direction to the outer boundary wall 2 in order to come into contact with this.
- the second part 12b the width of which does not vary in the axial direction since the inner delimiting wall 3 is cylindrical, can then be placed by pushing it onto the support strut 5 in the axial direction.
- Fi gur 4 the direction of flow is indicated by arrows.
- the claddings 12 are further designed in such a way and are each arranged on the respective original support strut 5 in such a way that the following applies.
- the respective cladding 12 overlaps the front edge 10 of the respective original support strut 5 over their total te length (see FIG. 4) and forms the front edge 14 of the respective adapted support strut 13. As can be seen, the front edge 14 formed by the cladding 12 is wider is than the leading edge 10 behind it of the respective original support strut 5.
- the respective cladding 12 extends the pressure side wall 8 of the respective original support strut 5 over the front edge 10 of the respective original support strut 5 also going forward. The same applies to the pressure side wall 9.
- the respective cladding 12 also extends over a section of the pressure side wall 8 of the respective original support strut 5 and forms a portion of the pressure side wall 15 of the respective adapted support strut 13. It extends in an analogous manner over a portion of the suction side wall 9 of the respective original support strut 5 and forms a portion of the suction side wall 16 of the respective adap-oriented support strut 13, which is also for both parts 12a,
- the respective cladding 12 (with both parts 12a, 12b) extends, as can be seen well in Figures 2 and 4, in the axial direction over a larger portion of the suction side wall 9 of the respective original support strut 5 than in the axial direction over the pressure side wall 8 of the respective original support strut 5. In other words, it changes the external geometry on the pressure side over a larger section than on the suction side.
- the adapted support strut 13 comprising the respective cladding 12 is distinguished, just like the respective original support strut 5, by an at least partially curved suction side wall 16.
- the curvature of the suction side wall 16 of the respective adapted support strut 13 is partially different from the curvature of the suction side wall 9 of the respective original support strut 5, specifically in the left half in Figure 2, where the cladding 12 is in front of the suction side wall.
- the angle that is included between the pressure side wall 15 of the respective adapted support strut 13 and the suction side wall 16 of the respective adapted support strut 13 is smaller than the angle between the pressure side wall 8 of the respective original support strut 5 and the suction side wall 9 of the respective original Support strut 5 is closed.
- a flow geometry is obtained as a result of the attachment of the respective cladding 12, which is characterized by a pressure and suction side wall which - compared with the geometry of the original support strut 5 - are characterized by a more parallel orientation.
- the position of the front edge and its angle, in particular the angle that this has in relation to a working medium entering the diffuser 1 in operation at the front (left in FIG. 1), is substantially changed by means of the respective cladding 12.
- the curvature on the convex suction side is also determined by means of the respective Gen cladding 12 varies and a smooth transition from the front edge 14 of the adapted support strut 13 to the rear, in Figure 2 right half of the original support strut 5 is realized.
- the modified profile of the adapted support struts 13 is better directed for the turbine outlet flow emerging from the last turbine stage in partial load operation due to the reduced leading edge angle and the reduced curvature.
- the original geometry of the original support struts 5 is better adapted to the turbine output flow in full load operation.
- the cladding 12 extends everywhere outside the original support strut 5, in other words only rests on it or on it, and the ur nal external geometry of the original struts 5 is preserved below the respective cladding 12.
- a cavity 17 is enclosed between the respective cladding 12 and the respective original support strut 5, as can also be seen well in FIG. 2, so that the change in external geometry is implemented in a particularly material-saving manner.
- the wall thickness of the cladding 12 decreases in order to achieve a particularly smooth transition without an edge.
- Means for releasably attaching the respective Ver clothing 12 to the respective original support strut 5 are also provided.
- the Verklei applications are each releasably attached to the original support struts 5, which has proven to be particularly advantageous. In this way, these can also be easily removed again in order to return to the original external geometry without cladding 12 or to change to cladding 12 with a different design.
- the cladding 12 is attached to the original support struts 5 by means of screws 18 (see FIG. 2), which are screwed into threaded holes through openings 19 provided for this purpose in the respective Ver cladding 12, which strive into the original support 5 introduced were to enable the detachable fixation of the panels 12.
- the threaded bores introduced represent the only required modification of the original support struts 5 and, apart from that, are in their original state.
- each of the panels 12 is releasably attached to the respective support strut 5 by means of twelve screws 18.
- the twelve openings 19 can be seen in FIG. As you can see, six openings are provided in each of the two cladding parts 12a, 12b in their end regions facing away from the front derkante 14.
- the original support struts 5 and the cladding 12 are distinguished by a cross-section that is constant in the radial direction. This is a different option.
- the cladding is designed and arranged on the respective original support strut in such a way that the respective adapted support strut 13 is characterized by a cross section that varies in the radial direction.
- FIGS. 5 and 6 show two sectional views at different radial positions through such an adapted support strut 13 comprising the cladding 12.
- FIG. 6 which shows, for example, a section closer to the inner delimiting wall 3
- the width of the front edge 14 formed by the cladding 12 is less than at the radial position according to FIG. 5, which is closer to the outer delimiting wall 2 .
- the width can, for example, continuously increase (or decrease) from the inner delimitation wall 3 to the outer delimitation wall 2.
- Other geometries are also possible.
- the original support strut 5 it is also possible for the original support strut 5 to be characterized by a cross section that varies in the radial direction. This is illustrated in Figures 7 and 8, which - in analogy to Figures 5 and 6 - show two sections through an original support strut with cladding 12 attached to it at different radial positions.
- the front edge 10 of the original support strut 5 is wider at a radial position that is closer to the outer boundary wall 2 (FIG. 7) than at the radial position according to FIG. 8, which is closer to the inner boundary wall 3. It can be the case, for example, that the width from the outer 2 to the inner boundary wall increases continuously (which also decreases). Other geometries are also possible.
- the (respective) original support strut 5 has a cross-section that can be changed in radial direction, it may also be that the (respective) cladding is formed in such a way and is arranged on the (respective) original support strut 5 that the (respective)
- the adapted support strut 13 is characterized by a cross section that remains constant in the radial direction, as FIGS. 7 and 8 show by way of example.
- a one-part cladding 12 can also be used.
- FIG. 9 An example of such is shown in Figure 9, the se - in analogy to Figure 4 - shows the view of the pressure side wall 8 on the left and the view of the suction side wall 9 on the right. If the width or the diameter of the flow channel 4 is constant, the inner and outer boundary walls run parallel and a one-piece cladding 12 can be pushed onto the (respective) original support strut 5 in the axial direction.
- a multi-part cladding 12 can alternatively or additionally be used if both a change in geometry in the area of the front edge 10 and a change in geometry in the area of the rear edge 11 of the (respective) support strut 5 is desired or necessary. Then, for example, at least one part 12a of the cladding 12 in the area of the front edge 10 of the original support strut 5 and at least one part 12b in the area of the rear edge 11 of the original support strut 5.
- FIG which - again in analogy to FIG. 4 - shows the view of the pressure side wall 8 on the left and the view of the suction side wall 9 on the right.
- the cladding part 12a overlaps the front edge 10 of the original support strut 5 and forms the front edge 14 of the adapted support strut 13-
- the Ver cladding part 12b overlaps the rear edge 11 of the original support strut 5 and forms the rear edge 20 of the adap-oriented support strut 5.
- the cladding parts 12a and 12b here - in contrast to the example from FIGS. 2 and 4 - do not lie against one another, but are arranged on the respective support strut 5 at a distance from one another. It should be noted that, as an alternative to the example shown in FIG. 10, it is of course also possible for the two elements 12a and 12b for their part to have multiple parts, for example two parts, as in Figure 2 and 4, are designed from.
- the cladding 12 would then comprise four parts, for example.
- each set of cladding 12 can include, for example, a cladding 12 as shown in Figures 2 and 4 and another cladding 12 with which an adapted support strut 13 can be obtained, which widens the front edge only to a small extent.
- the second cladding 12 can be distinguished, for example, by the shape shown in FIG. 6, this also for example over the entire extent in the radial direction.
- FIG. 11 shows, by way of example, a graph with simulation data which shows the efficiency improvement achieved by the procedure according to the invention.
- the simulation data were calculated using CFD (Computational Fluid Dynamics).
- the Y-axis shows the diffuser efficiency change compared to the original support struts 5, i.e. the original external geometry
- the X-axis shows the percentage of the turbine output current at full load (at 30 ° C ambient temperature ).
- the graph shows two different curves which include values for two different shapes B1, B2 of upstream turbine blades.
- the shape of B2 is characterized by a slightly wider front edge.
- B1 the full load turbine output current - for both forms Bl.
- B2 - an efficiency increase of more than 0.5% can be achieved. This part before falls approximately linearly to about 80% of the full load turbine output stream to about zero.
- the curves relate to the geometry adaptation according to FIG.
- the calibrated digital twin can be adapted to the effect that at least one support strut 5 of its diffuser 1 is an adap-oriented support strut 13 provided with a cladding 12, preferably all support struts are adap-oriented support struts 13.
- hypothetical operating data can be simulated (S3).
- Operating points can be found at which better performance, in particular better performance and / or efficiency, was achieved with the diffuser 1 with the original support struts 5 without cladding 12, and operating points can be found at which the diffuser 1 with the at least one adapted support strut 13, preferably with all of the adapted support struts 13, a better performance, in particular better performance and / or efficiency, was achieved (S4).
- case constellations can be simulated, which result from a different number of times the cladding is attached and / or changed and / or removed and / or different combinations of different cladding (s) and / or different times of attachment and / or changing and / or removing the cladding (s). From the different case constellations, that case constellation can then be determined. in which the best overall performance of the turbine arrangement is achieved, in particular over the entire period over which the historical operating data extend (S6).
- the best case constellation or the associated number and the associated timing for attaching and / or changing and / or removing the cladding (s) can be obtained (S7), in other words planning.
- this case constellation or the plan determined by simulation can be used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020203547.4A DE102020203547A1 (de) | 2020-03-19 | 2020-03-19 | Verfahren zum Anpassen einer Turbinenanordnung, Verkleidung, Satz mit mehreren Verkleidungen, Verwendung und Diffusor |
| PCT/EP2021/054576 WO2021185544A1 (de) | 2020-03-19 | 2021-02-24 | Verfahren zum anpassen einer turbinenanordnung, verkleidung, satz mit mehreren verkleidungen, verwendung und diffusor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4090836A1 true EP4090836A1 (de) | 2022-11-23 |
Family
ID=74873686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21711746.4A Pending EP4090836A1 (de) | 2020-03-19 | 2021-02-24 | Verfahren zum anpassen einer turbinenanordnung, verkleidung, satz mit mehreren verkleidungen, verwendung und diffusor |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4090836A1 (de) |
| CN (1) | CN115279995B (de) |
| DE (1) | DE102020203547A1 (de) |
| WO (1) | WO2021185544A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103635658B (zh) | 2011-05-16 | 2015-09-09 | Gkn航空公司 | 气体涡轮结构件的整流装置 |
| US9359900B2 (en) * | 2012-10-05 | 2016-06-07 | General Electric Company | Exhaust diffuser |
| US9528440B2 (en) | 2013-05-31 | 2016-12-27 | General Electric Company | Gas turbine exhaust diffuser strut fairing having flow manifold and suction side openings |
| US9494053B2 (en) * | 2013-09-23 | 2016-11-15 | Siemens Aktiengesellschaft | Diffuser with strut-induced vortex mixing |
| US9784133B2 (en) * | 2015-04-01 | 2017-10-10 | General Electric Company | Turbine frame and airfoil for turbine frame |
-
2020
- 2020-03-19 DE DE102020203547.4A patent/DE102020203547A1/de not_active Withdrawn
-
2021
- 2021-02-24 EP EP21711746.4A patent/EP4090836A1/de active Pending
- 2021-02-24 CN CN202180022351.0A patent/CN115279995B/zh active Active
- 2021-02-24 WO PCT/EP2021/054576 patent/WO2021185544A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN115279995B (zh) | 2025-09-09 |
| DE102020203547A1 (de) | 2021-09-23 |
| WO2021185544A1 (de) | 2021-09-23 |
| CN115279995A (zh) | 2022-11-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2623793B1 (de) | Strömungsmaschine mit Schaufelgitter | |
| EP2362065B1 (de) | Nebenstromkanal mit Nachleitschaufelkranz in einem Turbofantriebwerk | |
| DE102004022063A1 (de) | Abgasdiffusor für eine Axialströmungsturbine | |
| DE102009011924A1 (de) | Nebenstromkanal eines Turbofantriebwerks | |
| EP2927503A1 (de) | Gasturbinenverdichter, Flugtriebwerk und Auslegungsverfahren | |
| EP2179143A2 (de) | Spaltkühlung zwischen brennkammerwand und turbinenwand einer gasturbinenanlage | |
| EP3701143B1 (de) | Rotorblatt einer windenergieanlage und verfahren zu dessen auslegung | |
| DE102009029587A1 (de) | Rotor einer Turbomaschine | |
| DE102012104240B4 (de) | Hybridströmungs-Schaufeldesigns | |
| WO2010026005A1 (de) | Turbinenlaufschaufel mit angepasster eigenfrequenz mittels eines einsatzes | |
| EP1716315A2 (de) | Verfahren zur fertigung angepasster, str mungstechnischer ob erfl chen | |
| EP2696042A1 (de) | Strömungsmaschine mit mindestens einem Leitschaufelkranz | |
| DE102006054684B4 (de) | Leitapparat für eine Dampfturbine und Dampfturbine mit derartigem Leitapparat | |
| WO2021185544A1 (de) | Verfahren zum anpassen einer turbinenanordnung, verkleidung, satz mit mehreren verkleidungen, verwendung und diffusor | |
| EP3498972B1 (de) | Turbinenmodul für eine strömungsmaschine | |
| EP2808486A1 (de) | Wuchtkörper für eine Laufschaufelanordnung | |
| EP1632650B1 (de) | Dampfturbine | |
| DE102008062078B4 (de) | Eintrittsstufe für eine Dampfturbine | |
| EP3199759A1 (de) | Turbinenschaufel für eine thermische strömungsmaschine | |
| DE602005000465T2 (de) | Verfahren zur geometrischen Konstruktion eines Grats eines geschmiedeten Werkstückes mit komplexer Form | |
| EP3431707A1 (de) | Schaufel, schaufelkranz, schaufelkranzsegment und strömungsmaschine | |
| DE102023203273A1 (de) | Verbessertes Brennerteil und Brenner mit einem solchen Brennerteil | |
| WO2012097798A1 (de) | Zwischengehäuse einer gasturbine mit einer aussen liegenden begrenzungswand welches stromaufwärts einer stützrippe eine in umfangrichtung verändernde kontur aufweist zur verringerung der sekundärströmungsverluste | |
| EP3401503A1 (de) | Rotorvorrichtung einer strömungsmaschine | |
| DE112008000140B4 (de) | Leitapparat für Turbomaschinen und Herstellungsverfahren |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20220818 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SIEMENS ENERGY GLOBAL GMBH & CO. KG |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20240604 |