CN114294678B - Intelligent combustion control system for outlet temperature distribution and working method - Google Patents
Intelligent combustion control system for outlet temperature distribution and working method Download PDFInfo
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- CN114294678B CN114294678B CN202111465074.9A CN202111465074A CN114294678B CN 114294678 B CN114294678 B CN 114294678B CN 202111465074 A CN202111465074 A CN 202111465074A CN 114294678 B CN114294678 B CN 114294678B
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Abstract
The invention discloses an outlet temperature distribution intelligent combustion control system and a working method, belonging to the field of combustion of gas turbines. The change of the deflection angle of the swirler can change the flow field structure and the combustion characteristic of the main combustion area of the flame tube, so that the outlet temperature distribution of the combustion chamber is adjusted, the working environment of the turbine is improved, the cracking and ablation phenomena of the blades of the turbine guider are reduced, the service life of the turbine is prolonged, and the working reliability of the gas turbine is improved.
Description
Technical Field
The invention belongs to the field of combustion of gas turbines, and relates to an outlet temperature distribution intelligent combustion control system and a working method.
Background
As gas turbines move toward high temperature rise, high pressure ratios, combustor exit temperatures continue to increase, and gas turbines often experience cracking and erosion of turbine nozzle vanes in practical use due to limitations in material heat resistance and fatigue resistance. The phenomenon is mainly caused by poor quality of temperature distribution at the outlet of the combustion chamber, local hot spots and high-temperature hot spots, so that the temperature distribution at the outlet of the combustion chamber is directly related to the working environment of the turbine, and the design and the debugging of the temperature distribution are one of the difficulties in designing the combustion chamber.
Factors that affect the combustor exit temperature profile include: the design of flame tube flow distribution, the atomizing characteristic of a nozzle, the design of a mixing hole, the design of a swirler and the like. The swirler directly affects the head flow field structure and combustion characteristics of the combustion chamber, and is one of important structures affecting the temperature distribution of the outlet of the combustion chamber, the relative angle between the windward side and the incoming flow greatly affects the temperature distribution of the outlet of the combustion chamber, in the existing combustion chamber of the gas turbine, the swirler is fixed on the flame tube, the windward side of the swirler is perpendicular to the incoming flow direction, when the operation condition of the gas turbine is greatly changed, the distribution quality of the outlet temperature of the combustion chamber is poor, so that the higher temperature repeatedly and continuously appears on a certain radius of the turbine, finally the blades of the turbine guider are ablated, and the great influence is generated on the service life of the turbine, the working reliability of the gas turbine and the like.
Disclosure of Invention
Aiming at the phenomena of cracking and ablation of blades of a turbine guider caused by the reduction of the quality of the temperature distribution at the outlet of a combustion chamber due to the change of the working condition at the inlet of the combustion chamber, the invention provides an intelligent combustion control system and a working method for the temperature distribution at the outlet of the combustion chamber.
The invention is realized by the following steps:
an outlet temperature distribution intelligent combustion control system and a working method thereof comprise a diffuser and a combustion chamber casing, wherein a flame tube is arranged in the combustion chamber casing; along the incoming flow direction, the front end of the flame tube is sequentially provided with a cap and a swirler; the swirler and the flame tube are not integrated, and the swirler and the flame tube are indirectly connected by respectively arranging a first deflection guide sheet and a second deflection guide sheet which are welded with the swirler into a whole at two sides of the swirler.
The top ends of the first deflection guide sheet and the second deflection guide sheet are provided with radians; the flame tube is provided with a first boss and a second boss, grooves are formed in the first boss and the second boss, arc-shaped rails are arranged at the bottoms of the grooves, the arc-shaped rails of the first boss and the second boss are matched with the top radians of a first deflection guide sheet and a second deflection guide sheet, and the first deflection guide sheet and the second deflection guide sheet can move and deflect along the arc-shaped rails in the grooves of the first boss and the second boss.
A first telescopic strut group, namely a first telescopic strut and a second telescopic strut, and a second telescopic strut group, namely a third telescopic strut and a fourth telescopic strut are respectively arranged at the front end of the flame tube along the axial direction of the flame tube; the first telescopic support rod group and the second telescopic support rod group are used for respectively driving the first deflection guide sheet and the second deflection guide sheet to move along the arc-shaped tracks of the inner grooves of the first boss and the second boss in a telescopic mode in opposite directions, so that deflection of the cyclone is controlled, and the telescopic amount of the first telescopic support rod group and the second telescopic support rod group determines the deflection angle of the cyclone. The deflection of the swirler can change the flow field structure and the combustion characteristic of the main combustion area of the flame tube, intelligently adjust the outlet temperature distribution of the combustion chamber, improve the working environment of the turbine, reduce the cracking and ablation of the blades of the turbine guider, and improve the service life of the turbine and the working reliability of the gas turbine.
The working method of the outlet temperature distribution intelligent combustion control system specifically comprises the following steps:
firstly, marking outlet temperature distribution required by a combustion chamber under different working conditions, namely different inlet pressures and different inlet temperatures, obtaining deflection angles corresponding to a swirler under all the working conditions, and establishing a set of control algorithm of the combustion chamber inlet pressure and the swirler deflection angle at a control terminal;
when the working condition changes, the temperature distribution of the outlet of the combustion chamber deviates from the design state, the control terminal calculates the angle of the swirler required to deflect under the current working condition according to the corresponding relation between the inlet pressure of the combustion chamber calibrated in advance and the deflection angle of the swirler, converts the angle into an adjusting signal of a hydraulic system and transmits the adjusting signal to a corresponding mechanical device, and the hydraulic system is utilized to respectively control the first telescopic strut group and the second telescopic strut group to stretch in opposite directions, so that the deflection of the swirler is controlled, the flow field structure and the combustion characteristic of the main combustion area of the flame tube are changed, the temperature distribution of the outlet of the combustion chamber is kept in the design state, and the purpose of intelligently controlling the temperature distribution of the outlet of the combustion chamber is achieved by controlling the deflection of the swirler.
Furthermore, the first telescopic strut group is connected with the first hydraulic main way, the second telescopic strut group is connected with the second hydraulic main way, and the telescopic struts are controlled to stretch by utilizing a hydraulic principle.
Furthermore, the cyclone is hinged with the first telescopic strut group and the second telescopic strut group through a first deflection guide sheet and a second deflection guide sheet respectively; specifically, a hole is formed in the first deflection guide plate, and the first deflection support rod penetrates through the hole to be connected with the first deflection guide plate; the second deflection guide piece is provided with a hole, and the second deflection support rod penetrates through the hole to be connected with the second deflection guide piece; and then the first telescopic strut group is connected with the first deflection strut, and the second telescopic strut group is connected with the second deflection strut, so that the hinge connection between the cyclone and the first and second telescopic strut groups is formed.
Furthermore, the first deflection supporting rod and the second deflection supporting rod are respectively pushed to move horizontally along the axial direction of the flame tube through the extension and retraction of the first telescopic supporting rod group and the second telescopic supporting rod group, and then the first deflection guide piece and the second deflection guide piece are respectively driven to move along the arc-shaped track of the boss inner groove additionally arranged on the flame tube. The first deflection supporting rod and the second deflection supporting rod are respectively pushed to translate along the axial direction of the flame tube in opposite directions through the first telescopic supporting rod group and the second telescopic supporting rod group in opposite directions in a telescopic mode, then the first deflection guide piece and the second deflection guide piece are respectively driven to move along the arc-shaped tracks of the boss inner grooves additionally arranged on the flame tube in opposite directions, finally deflection of the swirler along the axial direction of the flame tube is achieved, and the deflection angle of the swirler is determined by the telescopic amount of the two supporting rod groups.
Furthermore, a cavity is reserved in each of the first boss and the second boss, and a space is provided for the first deflection support rod and the second deflection support rod to move in the boss in the axial direction of the flame tube in a translation mode.
Furthermore, when the swirler deflects, the relative distance between the first deflection support rod and the second deflection support rod connected with the swirler is increased, so that the first deflection guide piece and the second deflection guide piece are designed into telescopic structures, and the first deflection support rod and the second deflection support rod are ensured to only translate along the axial direction of the flame tube.
Compared with the prior art, the invention has the beneficial effects that:
the outlet temperature distribution intelligent combustion control system and the method change the flow field structure and the combustion characteristic of the main combustion area of the flame tube by adjusting the relative angle between the windward side of the swirler and the incoming flow, intelligently adjust the outlet temperature distribution of the combustion chamber, and realize the controllability of the outlet temperature distribution of the combustion chamber, thereby improving the working environment of the turbine under the condition of variable working conditions, reducing the cracking and the ablation of the blades of the turbine guider, reducing the design difficulty of the cooling of the turbine, prolonging the service life of the turbine and improving the working reliability of the gas turbine.
Drawings
FIG. 1 is a schematic view of the outlet temperature profile intelligent combustion control system of the present invention in an inactive state;
FIG. 2 is a schematic view of the outlet temperature profile intelligent combustion control system of the present invention in an enabled state;
FIG. 3 is a schematic view of the connection of the hydraulic system, telescoping strut and swirler;
FIG. 4 is a schematic view of the expansion and contraction of the deflector vane during the deflection of the cyclone;
FIG. 5 is a control system schematic of the outlet temperature profile intelligent combustion control system of the present invention;
the device comprises a diffuser, a cap cover, a first hydraulic main, a first telescopic supporting rod, a second telescopic supporting rod, a first boss, a first deflection guide sheet, a combustion chamber casing, a flame tube, a second deflection guide sheet, a second boss, a first deflection guide sheet, a combustion chamber casing, a second deflection guide sheet, a second boss, a third telescopic supporting rod, a fourth telescopic supporting rod, a 15-swirler, a first deflection supporting rod and a second deflection supporting rod, wherein the diffuser, the cap cover, the first hydraulic main, the first telescopic supporting rod, the second telescopic supporting rod, the first boss, the first deflection guide sheet, the second boss, the third telescopic supporting rod, the fourth telescopic supporting rod, the swirler, the first deflection supporting rod and the 17-second deflection supporting rod are 1-diffuser, 2-cap cover, 3-first hydraulic main, 8-combustor casing, 9-flame tube, 10-second deflection guide sheet, 11-second boss, 12-third telescopic supporting rod, 13-fourth telescopic supporting rod, 15-swirler, 16-first deflection supporting rod and 17-second deflection supporting rod.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention more clear, the present invention is further described in detail by the following examples. It should be noted that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1~2, the outlet temperature distribution intelligent combustion control system of the present invention includes a diffuser 1 and a combustion chamber casing 8, a flame tube 9 is disposed inside the combustion chamber casing 8, and a cap 2 and a swirler 15 are sequentially disposed at a front end of the flame tube 9 along an incoming flow direction; different from the traditional combustion chamber, the swirler 15 and the flame tube 9 are not integrated, the swirler 15 and the flame tube 9 are indirectly connected by arranging the first deflection guide sheet 7 and the second deflection guide sheet 10 which are welded with the swirler 15 into a whole at two sides of the swirler 15, and the top end of each deflection guide sheet is provided with a radian; a first boss 6 and a second boss 11 are respectively arranged on the flame tube 9, a groove is formed in the boss, the bottom of the groove is provided with an arc-shaped track, and the arc-shaped track is matched with the top radians of the first deflection guide sheet and the second deflection guide sheet; a first telescopic strut group, namely a first telescopic strut 4 and a second telescopic strut 5, and a second telescopic strut group, namely a third telescopic strut 12 and a fourth telescopic strut 13 are respectively arranged at the front end of the flame tube 9 along the axial direction of the flame tube 9; the first telescopic supporting rod group is connected with the first hydraulic main line 3, and the second telescopic supporting rod group is connected with the second hydraulic main line 14, so that the telescopic supporting rods are controlled to be telescopic by utilizing a hydraulic principle.
As shown in fig. 3, the cyclone 15 is hinged to the first telescopic strut group and the second telescopic strut group through the first deflecting guide sheet 7 and the second deflecting guide sheet 10 respectively; specifically, a hole is formed at a proper position on a first deflection guide sheet 7, a first deflection support rod 16 passes through the hole to be connected with the first deflection guide sheet 7, a hole is formed at a proper position on a second deflection guide sheet, a second deflection support rod 17 passes through the hole to be connected with a second deflection guide sheet 10, then a first telescopic support rod group is connected with the first deflection support rod 16, and a second telescopic support rod group is connected with the second deflection support rod 17, so that the hinge connection between the cyclone 15 and the first and second telescopic support rod groups is formed; a cavity is respectively reserved inside the first boss 6 and the second boss 11 which are additionally arranged on the flame tube 15 so as to provide space for the translation of the first deflection supporting rod 16 and the second deflection supporting rod 17 in the boss along the axial direction of the flame tube 9.
As shown in fig. 4, when the swirler deflects, the relative distance between the first deflecting strut and the second deflecting strut connected thereto increases, so that the first deflecting guide piece and the second deflecting guide piece are designed to be telescopic, and the first deflecting strut and the second deflecting strut are ensured to perform translational motion only in the axial direction of the combustor basket.
Fig. 1 is a schematic diagram of a state when the intelligent combustion control system for outlet temperature distribution is not activated, when the inlet working condition of the combustion chamber is a design working condition, the outlet temperature distribution of the combustion chamber is in the design state, the swirler 15 does not deflect, and the windward side of the swirler is perpendicular to the incoming flow; when the working condition of the inlet of the combustion chamber changes and the temperature distribution of the outlet of the combustion chamber deviates from the design state, the angle of the swirler 15 required to deflect under the current working condition is calculated at the control terminal according to the corresponding relation between the calibrated inlet pressure of the combustion chamber and the deflection state of the swirler 15, and is converted into an adjusting signal of a hydraulic system, so that the first telescopic strut group and the second telescopic strut group are respectively controlled to extend and retract in opposite directions, the first deflection strut 16 and the second deflection strut 17 are driven to translate along the axial direction of the flame tube in opposite directions, the first deflection guide sheet 7 and the second deflection guide sheet 10 are driven to move along the arc-shaped tracks of the inner grooves of the first boss 7 and the second boss 11 in opposite directions, so that the swirler 15 is driven to deflect along the axial direction of the flame tube 9, the relative angle between the windward side of the swirler 15 and the incoming flow is changed, the flow field structure and the combustion characteristic of the main combustion zone of the flame tube are further changed, the temperature distribution of the outlet of the combustion chamber is improved, and the purpose of intelligently adjusting the temperature distribution of the swirler is achieved, and the deflection state of the swirler at this time is shown in fig. 2.
As shown in fig. 5, the working process of the present invention is:
after the air compressed by the compressor passes through the diffuser 1, one part of the air enters the inner ring channel and the outer ring channel, and the other part of the air enters the flame tube 9 through the swirler 15.
Firstly, marking the outlet temperature distribution of the combustion chamber under different working conditions (inlet pressure and inlet temperature), obtaining the deflection angle corresponding to the swirler under all the working conditions, and establishing a set of control algorithm of the inlet pressure of the combustion chamber and the deflection angle of the swirler 15 at a control terminal.
When the working condition changes and the temperature distribution of the outlet of the combustion chamber deviates from the design state, the control terminal calculates the angle of the swirler 15 required to deflect according to the current inlet pressure of the combustion chamber, converts the angle into an adjusting signal of a hydraulic system, further controls the corresponding telescopic supporting rod to stretch so as to realize the deflection of the swirler 15, and changes the flow field structure and the combustion characteristic of the main combustion area of the flame tube 9 through the deflection of the swirler 15, so that the temperature distribution of the outlet of the combustion chamber is changed, and the purpose of intelligently adjusting the temperature distribution of the outlet of the combustion chamber is achieved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.
Claims (4)
1. The intelligent combustion control system for outlet temperature distribution is characterized by comprising a diffuser (1) and a combustion chamber casing (8), wherein a flame tube (9) is arranged in the combustion chamber casing (8); along the incoming flow direction, the front end of the flame tube (9) is sequentially provided with a cap (2) and a swirler (15); the swirler (15) and the flame tube (9) are not integrated, and the swirler (15) and the flame tube (9) are indirectly connected by respectively arranging a first deflection guide sheet (7) and a second deflection guide sheet (10) which are welded with the swirler (15) into a whole at two sides of the swirler (15);
the top ends of the first deflection guide sheet (7) and the second deflection guide sheet (10) are provided with radians;
the flame tube (9) is provided with a first boss (6) and a second boss (11), the first boss (6) and the second boss (11) are internally provided with grooves, the bottoms of the grooves are respectively provided with an arc-shaped track, the arc-shaped tracks of the first boss (6) and the second boss (11) are matched with the top radians of a first deflection guide sheet (7) and a second deflection guide sheet (10), and the first deflection guide sheet (7) and the second deflection guide sheet (10) can move and deflect along the arc-shaped tracks in the grooves of the first boss (6) and the second boss (11);
a first telescopic strut group, namely a first telescopic strut (4) and a second telescopic strut (5), is respectively arranged at the front end of the flame tube (9) along the axial direction of the flame tube (9); a second telescopic strut group, namely a third telescopic strut (12) and a fourth telescopic strut (13);
the first telescopic strut group and the second telescopic strut group are used for respectively driving the first deflection guide sheet (7) and the second deflection guide sheet (10) to move along the arc-shaped tracks of the inner grooves of the first boss (6) and the second boss (11) in a telescopic mode in opposite directions, so that the deflection of the cyclone (15) is controlled, and the telescopic amount of the first telescopic strut group and the second telescopic strut group determines the deflection angle of the cyclone (15);
the cyclone (15) is hinged with the first telescopic strut group and the second telescopic strut group through a first deflection guide sheet (7) and a second deflection guide sheet (10) respectively; a first deflection guide sheet (7) is provided with a hole, and a first deflection support rod (16) passes through the hole and is connected with the first deflection guide sheet (7); a second deflection guide sheet (10) is provided with a second hole, and a second deflection support rod (17) passes through the second hole and is connected with the second deflection guide sheet (10); then the first telescopic strut group is connected with a first deflection strut (16), and the second telescopic strut group is connected with a second deflection strut (17), so that the hinge connection between the cyclone (15) and the first telescopic strut group and the second telescopic strut group is formed;
the first deflection supporting rod (16) and the second deflection supporting rod (17) are respectively pushed to move in a translation mode along the axial direction of the flame tube (9) through the extension and retraction of the first telescopic supporting rod group and the second telescopic supporting rod group, so that the first deflection guide piece (7) and the second deflection guide piece (10) are respectively driven to move along the arc-shaped tracks of the inner grooves of the first boss (6) and the second boss (11) additionally arranged on the flame tube (9), and finally the deflection of the swirler (15) along the axial direction of the flame tube (9) is realized;
the working method of the control system comprises the following steps:
marking the outlet temperature distribution of the combustion chamber under different working conditions, different inlet pressures and different inlet temperatures to obtain the corresponding deflection angle of the swirler (15) under all working conditions, and establishing a set of control algorithm of the combustion chamber inlet pressure and the swirler (15) deflection angle at a control terminal;
when the working condition changes, the temperature distribution of the outlet of the combustion chamber deviates from the design state, the control terminal calculates the angle of the swirler (15) required to deflect under the current working condition according to the corresponding relation between the inlet pressure of the combustion chamber calibrated in advance and the deflection angle of the swirler (15), converts the angle into an adjusting signal of a hydraulic system and transmits the adjusting signal to a corresponding mechanical device, the hydraulic system is utilized to respectively control the first telescopic strut group and the second telescopic strut group to stretch in opposite directions, so that the deflection of the swirler (15) is controlled, the flow field structure and the combustion characteristic of the main combustion area of the flame tube (9) are changed, the temperature distribution of the outlet of the combustion chamber is kept in the design state, and the purpose of intelligently controlling the temperature distribution of the outlet of the combustion chamber is achieved by controlling the deflection of the swirler (15).
2. The intelligent combustion control system with outlet temperature distribution as claimed in claim 1, wherein the first telescopic strut group is connected with the first hydraulic main line (3), the second telescopic strut group is connected with the second hydraulic main line (14), and the telescopic struts are controlled to be telescopic by using a hydraulic principle.
3. An intelligent combustion control system with outlet temperature distribution according to claim 1, characterized in that a cavity is reserved in each of the first boss (6) and the second boss (11) to provide space for the first deflection support rod (16) and the second deflection support rod (17) to respectively move in the first boss (6) and the second boss (11) along the axial direction of the flame tube (9).
4. An outlet temperature distribution intelligent combustion control system as claimed in claim 1, characterized in that, the first deflecting guide vane (7) and the second deflecting guide vane (10) are of a telescopic structure.
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| CN202111465074.9A CN114294678B (en) | 2021-12-03 | 2021-12-03 | Intelligent combustion control system for outlet temperature distribution and working method |
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| CN202111465074.9A CN114294678B (en) | 2021-12-03 | 2021-12-03 | Intelligent combustion control system for outlet temperature distribution and working method |
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| CN114294678B true CN114294678B (en) | 2022-10-21 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1580643A (en) * | 2003-08-11 | 2005-02-16 | 通用电气公司 | Combuster vault cover assembly with forming swirler for gas-turbine engine |
| EP2107300A1 (en) * | 2008-04-01 | 2009-10-07 | Siemens Aktiengesellschaft | Swirler with gas injectors |
| CN102022753A (en) * | 2010-12-31 | 2011-04-20 | 北京航空航天大学 | Low-pollution combustion chamber with premixed and pre-evaporated precombustion part |
| CN104728866A (en) * | 2015-03-17 | 2015-06-24 | 上海交通大学 | Five-nozzle combustor structure applied to gas turbine low-pollution combustion chamber |
| CN107339712A (en) * | 2017-06-13 | 2017-11-10 | 中国航发湖南动力机械研究所 | Radial flow combustor diffuser and gas turbine |
| CN207648852U (en) * | 2017-11-23 | 2018-07-24 | 新奥能源动力科技（上海）有限公司 | A kind of combustion chamber and gas turbine |
-
2021
- 2021-12-03 CN CN202111465074.9A patent/CN114294678B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1580643A (en) * | 2003-08-11 | 2005-02-16 | 通用电气公司 | Combuster vault cover assembly with forming swirler for gas-turbine engine |
| EP2107300A1 (en) * | 2008-04-01 | 2009-10-07 | Siemens Aktiengesellschaft | Swirler with gas injectors |
| CN102022753A (en) * | 2010-12-31 | 2011-04-20 | 北京航空航天大学 | Low-pollution combustion chamber with premixed and pre-evaporated precombustion part |
| CN104728866A (en) * | 2015-03-17 | 2015-06-24 | 上海交通大学 | Five-nozzle combustor structure applied to gas turbine low-pollution combustion chamber |
| CN107339712A (en) * | 2017-06-13 | 2017-11-10 | 中国航发湖南动力机械研究所 | Radial flow combustor diffuser and gas turbine |
| CN207648852U (en) * | 2017-11-23 | 2018-07-24 | 新奥能源动力科技（上海）有限公司 | A kind of combustion chamber and gas turbine |
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