Rear switching section and fan-shaped combustion chamber tester

Abstract

The invention provides a rear switching section and a fan-shaped combustion chamber tester, and relates to the technical field of aero-engine combustion chamber tests. The rear switching section comprises a fan-shaped pipe section, a round pipe section, a connecting flat plate and a heat insulation baffle, and the fan-shaped pipe section and the round pipe section are fixedly connected through the connecting flat plate. A first cooling water cavity is formed in the inner side of the fan-shaped pipe section, the heat insulation baffle is fixedly connected with the fan-shaped pipe section, a cooling water channel is formed between the heat insulation baffle and the connecting flat plate, a first spraying hole is formed in the fan-shaped pipe section, and cooling water in the first cooling water cavity is sprayed out through the first spraying hole to impact the heat insulation baffle. And an opening for communicating the cooling water channel with the internal space of the circular pipe section is formed between the radial outer end of the heat insulation baffle and the circular pipe section. Through the arrangement of the cooling structure, the fan rotating circle is effectively cooled in a targeted mode, and the capacity of the rear switching section for bearing extremely high-temperature and high-pressure fuel gas is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engine combustor tests, and more particularly, to a rear adapter section and a sector combustor tester. Background Art

[0002] In the technology of aero-engine combustors, from paper design to application in core engine / complete engine tests, technical verification needs to be carried out through single-head, multi-head to full-ring combustor tests. Single-head combustor tests are generally used for screening multiple schemes of combustors, screening out one or several schemes with better comprehensive performance from multiple schemes, and then further test verification is carried out in sector combustors and even full-ring combustors.

[0003] For a sector combustor, its biggest technical challenge is that the structural strength of the special-shaped structure is difficult to withstand high temperature and high pressure. In particular, for modern new aero-engines, the average temperature at the combustor outlet can reach 2100K (and above), and the pressure can reach 4MPa. Most materials cannot withstand it. Let alone the special-shaped structure characteristics of the sector combustor test piece. Therefore, downstream of the sector combustor, an adapter section structure that can withstand extremely high temperature and high pressure (≮2100K, ≮4MPa) gas is required to safely guide the high temperature and high pressure gas at the outlet of the sector combustor to the exhaust section of the tester. Summary of the Invention

[0004] The purpose of the present invention is to provide a rear adapter section that can withstand extremely high temperature and high pressure gas and safely guide the high temperature and high pressure gas at the outlet of the sector combustor to the exhaust section.

[0005] The purpose of the present invention is also to provide a sector combustor tester that can withstand extremely high temperature and high pressure gas and safely guide the high temperature and high pressure gas at the outlet of the sector combustor to the exhaust section.

[0006] The embodiments of the present invention can be realized in the following ways:

[0007] A rear adapter section is used to connect the rear measurement section and the exhaust pipe; the rear adapter section includes:

[0008] A sector pipe section, one end of which is used to connect with the rear measurement section; a first cooling water cavity is formed inside the sector pipe section;

[0009] A circular pipe section, one end of which is used to connect with the exhaust pipe;

[0010] A connecting flat plate, the radially inner end of which is fixedly connected to the other end of the sector pipe section, and the radially outer end of which is fixedly connected to the other end of the circular pipe section; and

[0011] The heat insulation baffle is fixedly connected to the sector-shaped pipe section, and a cooling water channel is formed between the heat insulation baffle and the connecting flat plate; the radially outer end of the heat insulation baffle is spaced from the inner wall of the circular pipe section to form an opening communicating the cooling water channel with the internal space of the circular pipe section;

[0012] Wherein, a first spray hole is formed in the sector-shaped pipe section, and the first spray hole is used for spraying the cooling water in the first cooling water cavity to impact the heat insulation baffle, and entering the internal space of the circular pipe section through the cooling water channel and the opening.

[0013] Optionally, a guiding portion is arranged on the heat insulation baffle, and the guiding portion is used for guiding the cooling water in the cooling water channel to flow towards the opening.

[0014] Optionally, the guiding portion is a convex structure fixedly connected to the side of the heat insulation baffle facing the connecting flat plate.

[0015] Optionally, the number of the first spray holes is multiple, and the multiple first spray holes are spaced along the circumference of the sector-shaped pipe section.

[0016] Optionally, one end of the sector-shaped pipe section away from the circular pipe section has a first connecting flange, and the first connecting flange is used for fixedly connecting with the second connecting flange of the rear measuring section;

[0017] A second spray hole communicating with the first cooling water cavity is formed in the first connecting flange, and the second spray hole is used for spraying the cooling water into the connecting gap between the first connecting flange and the second connecting flange.

[0018] Optionally, the number of the second spray holes is multiple, and the multiple second spray holes are spaced along the circumference of the sector-shaped pipe section.

[0019] Optionally, bolt holes are further arranged on the first connecting flange, the first connecting flange is used for being fixedly connected with the second connecting flange through connecting bolts, and the first spray hole is closer to the inner cavity of the sector-shaped pipe section than the bolt holes.

[0020] Optionally, a second cooling water cavity is further arranged in the circular pipe section.

[0021] Optionally, the second cooling water cavity is independent of the internal space of the circular pipe section; or,

[0022] The second cooling water cavity is communicated with the internal space of the circular pipe section through spray holes, so that the cooling water in the second cooling water cavity enters the internal space of the circular pipe section through the spray holes.

[0023] A sector combustion chamber tester, the sector combustion chamber tester includes a test section, a rear measurement section, an exhaust section and the above-mentioned rear adapter section; the test section, the rear measurement section, the rear adapter section and the exhaust section are connected in sequence.

[0024] Optionally, the rear measurement section includes a load-bearing casing and a temperature-resistant wall surface sleeved with each other, and a third cooling water cavity is formed between the load-bearing casing and the temperature-resistant wall surface.

[0025] Optionally, the exhaust section includes a load-bearing casing and a temperature-resistant wall surface sleeved with each other, and a fourth cooling water cavity is formed between the load-bearing casing and the temperature-resistant wall surface.

[0026] The beneficial effects of the rear adapter section and the sector combustion chamber tester provided by the embodiments of the present invention include:

[0027] The embodiments of the present invention provide a rear adapter section, which includes a sector pipe section, a circular pipe section, a connecting flat plate and a heat insulation baffle. The sector pipe section is fixedly connected to the radially inner end of the connecting flat plate, and the circular pipe section is fixedly connected to the radially outer end of the connecting flat plate. In this way, the connection between the sector pipe section and the circular pipe section is realized through the connecting flat plate. A first cooling water cavity is formed inside the sector pipe section. The heat insulation baffle is fixedly connected to the sector pipe section, and a cooling water channel is formed between the heat insulation baffle and the connecting flat plate. A first spray hole is opened on the sector pipe section, and the cooling water in the first cooling water cavity is sprayed out through the first spray hole to impact the heat insulation baffle, thereby cooling the heat insulation baffle. The radially outer end of the heat insulation baffle is spaced from the inner wall of the circular pipe section to form an opening communicating the cooling water channel with the internal space of the circular pipe section. In this way, after the cooling water sprayed out from the first spray hole to impact and cool the heat insulation baffle enters the cooling water channel, it enters the internal space of the circular pipe section through the opening. Through the above cooling structure setting, the effective cooling of the fan-to-circle part is realized specifically, and the ability of the rear adapter section to withstand extremely high-temperature and high-pressure gas is greatly improved. Thus, through this rear adapter section, the high-temperature and high-pressure gas at the outlet of the sector combustion chamber can be safely guided to the exhaust section.

[0028] The embodiments of the present invention also provide a sector combustion chamber tester. This sector combustion chamber tester includes the above-mentioned rear adapter section, so it also has the beneficial effect of greatly improving the ability of the rear adapter section to withstand extremely high-temperature and high-pressure gas. Thus, through this rear adapter section, the high-temperature and high-pressure gas at the outlet of the sector combustion chamber can be safely guided to the exhaust section. Description of the Drawings

[0029] After reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings, the above features and advantages of the present invention can be better understood. In the drawings, the components are not necessarily drawn to scale, and components with similar relevant characteristics or features may have the same or similar reference numerals.

[0030] Figure 1Shows a schematic structural diagram of a sector combustion chamber tester provided according to an aspect of the present invention;

[0031] Figure 2 Shows a schematic partial structural diagram of a sector combustion chamber tester provided according to an aspect of the present invention;

[0032] Figure 3 Shows Figure 2 The schematic cross-sectional structure diagram at A-A in

[0033] Figure 4 Shows Figure 2 The schematic cross-sectional structure diagram at B-B in

[0034] Figure 5 Shows a schematic structural diagram of a rear adapter section provided according to an aspect of the present invention;

[0035] Figure 6 Shows Figure 5 The schematic cross-sectional structure diagram at C-C in

[0036] Figure 7 Shows Figure 5 The schematic cross-sectional structure diagram at D-D in

[0037] Figure 8 Shows Figure 5 The schematic cross-sectional structure diagram at E-E in

[0038] Figure 9 Shows a schematic structural diagram of a heat insulation baffle in a rear adapter section provided according to an aspect of the present invention.

[0039] Reference numerals:

[0040] 100 - Sector Combustion Chamber Tester; 111 - Intake Section; 112 - Front Transition Section; 113 - Front Measurement Section; 114 - Test Section; 115 - Fuel Nozzle; 116 - Flame Tube Assembly; 117 - Ignition Spark Plug; 118 - Inlet Test Sensor; 119 - Outlet Test Sensor; 120 - Rear Measurement Section; 121 - First Load - Bearing Casing; 122 - First Heat - Resistant Wall; 123 - Third Cooling Water Chamber; 124 - Second Connecting Flange; 130 - Rear Transition Section; 131 - First Connecting Flange; 132 - Sector Tube Section; 1321 - Sector Section Load - Bearing Casing; 1322 - Sector Section Heat - Resistant Wall; 1323 - First Cooling Water Chamber; 1324 - First Spray Hole; 1325 - Second Spray Hole; 133 - Connecting Plate; 134 - Heat - Insulating Baffle; 135 - Flow - Guiding Part; 136 - Cooling Water Channel; 137 Opening; 138 - Circular Tube Section; 1381 - Circular Tube Load - Bearing Casing; 1382 - Circular Tube Heat - Resistant Wall; 1383 - Second Cooling Water Chamber; 139 - Third Connecting Flange; 140 - Exhaust Section; 141 - Second Load - Bearing Casing; 142 - Second Heat - Resistant Wall; 143 - Fourth Cooling Water Chamber; 144 - Fourth Connecting Flange; 150 - Gas Channel; 160 - Connecting Bolt; 171 - Outer Ring Part; 172 - Inner Ring Part; 173 - First Arc - Shaped Connecting Part; 174 - Second Arc - Shaped Connecting Part. Detailed Embodiment

[0041] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are merely exemplary and should not be construed as imposing any limitation on the protection scope of the present invention.

[0042] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", "vertical", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0043] At the same time, it should be noted that if terms such as "first", "second", etc. are only used for differential description and should not be construed as indicating or implying relative importance.

[0044] In the description of the present invention, it should also be noted that unless otherwise clearly specified or limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the communication inside two components, etc. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Figure 1 FIG. 4 is a schematic structural diagram of the sector combustion chamber tester 100 provided in this embodiment. Figure 2 FIG. 5 is a partial structural schematic diagram of the sector combustion chamber tester 100 provided in this embodiment. Specifically, Figure 2 the connection structure of the rear measurement section 120, the rear transition section 130, and the exhaust section 140 is shown, and at the same time Figure 2 the dashed line in FIG. 5 is used to schematically show the gas flow path. Please refer to Figure 1 and Figure 2 FIG. 6. In this embodiment, a rear transition section 130 is provided. Correspondingly, a sector combustion chamber tester 100 is also provided. As Figure 1 FIG. 6 shows the structure of the meridian plane of the sector combustion chamber tester 100.

[0046] The sector combustion chamber tester 100 includes a test section 114, a rear measurement section 120, a rear transition section 130, and an exhaust section 140. The test section 114, the rear measurement section 120, the rear transition section 130, and the exhaust section 140 are connected in sequence. At the same time, the rear measurement section 120, the rear transition section 130, and the exhaust section 140 are connected to form a gas passage 150 communicating with the test section 114.

[0047] Specifically, the sector combustion chamber tester 100 includes a sector combustion chamber structure, an intake section 111 connected to the inlet of the sector combustion chamber structure, and an exhaust section 140 connected to the outlet of the sector combustion chamber structure. The sector combustion chamber structure includes a front transition section 112, a front measurement section 113, a test section 114, a rear measurement section 120, and a rear transition section 130 arranged in sequence from the intake section 111 to the exhaust section 140. The rear transition section 130 is the last section of the sector combustion chamber structure, and the connection with the exhaust section 140 is realized through this rear transition section 130. In other words, when conducting a sector combustion chamber test, the two ends of the rear transition section 130 are respectively connected to the rear measurement section 120 and the exhaust section 140.

[0048] Further, a combustion chamber liner assembly 116, a fuel nozzle 115, and an igniter 117 are installed on the test section 114. An inlet test sensor 118 is installed on the front measurement section 113, and tests such as the inlet air temperature and inlet air pressure are performed through this inlet test sensor 118 before the gas enters the test section 114. An outlet test sensor 119 is installed on the rear measurement section 120, and tests such as the outlet temperature and gas composition are performed through this outlet test sensor 119 after the gas leaves the test section 114.

[0049] Figure 3 shows Figure 2 the schematic cross-sectional structure at A-A in. Please refer to Figures 1-3 , in this embodiment, each component of the sector-shaped combustion chamber structure has a sector-shaped part. At the same time, the connection between two adjacent components is connected through a sector-shaped flange. Now, the cross-sectional structure of the rear measurement section 120 is used to illustrate the shape of the sector-shaped part. Specifically, the sector includes an outer ring part 171, an inner ring part 172, and arc-shaped connecting parts on both sides. The arc-shaped connecting parts on both sides are the first arc-shaped connecting part 173 and the second arc-shaped connecting part 174 respectively. The outer ring part 171, the first arc-shaped connecting part 173, the inner ring part 172, and the second arc-shaped connecting part 174 are connected end to end to form a ring. The inner ring part 172 and the outer ring part 171 are circular arcs with the centers of the circles on the same side, that is, the center of the inner ring part 172 is located below the inner ring part 172 (as shown in the perspective view in Figure 3 ), and the center of the outer ring part 171 is located below the outer ring part 171 (as shown in the perspective view in Figure 3 ).

[0050] In this embodiment, the rear measurement section 120 includes a load-bearing casing and a temperature-resistant wall surface that are sleeved with each other. The load-bearing casing is the first load-bearing casing 121, and the temperature-resistant wall surface is the first temperature-resistant wall surface 122. The first temperature-resistant wall surface 122 is located inside the first load-bearing casing 121, and a flow passage connecting the test section 114 and the rear transition section 130 is formed by the first temperature-resistant wall surface 122. This flow passage is a part of the gas passage 150. At the same time, the first temperature-resistant wall surface 122 and the first load-bearing casing 121 are spaced apart in the radial direction, so as to form a third cooling water cavity 123 between the first load-bearing casing 121 and the first temperature-resistant wall surface 122. The first temperature-resistant wall surface 122 is cooled through this third cooling water cavity 123, so that the rear measurement section 120 can withstand the heat load of the high-temperature and high-pressure gas. Correspondingly, the cross-section of the first load-bearing casing 121 includes four parts: an outer ring part, a first arc-shaped connecting part, an inner ring part, and a second arc-shaped connecting part that are connected end to end. The first temperature-resistant wall surface 122 includes four parts: an outer ring part, a first arc-shaped connecting part, an inner ring part, and a second arc-shaped connecting part that are connected end to end.

[0051] Furthermore, the post-measurement section 120 also has a cooling water inlet (not shown in the figure) and a cooling water outlet (not shown in the figure) that communicate with the third cooling water chamber 123. Cooling water enters the third cooling water chamber 123 from the cooling water inlet, exchanges heat and cools the first temperature-resistant wall surface 122, and then flows out from the cooling water outlet. In other words, the cooling water of the post-measurement section 120 uses circulating water, and this circulating water does not enter the gas passage 150.

[0052] Figure 4 shows Figure 2 the sectional structure schematic diagram at B-B in. Please refer to Figures 1-4 , in this embodiment, the exhaust section 140 is a pipe section with a circular cross-section. At the same time, the exhaust section 140 also includes a load-bearing casing and a temperature-resistant wall surface that are sleeved with each other. This load-bearing casing is the second load-bearing casing 141, and this temperature-resistant wall surface is the second temperature-resistant wall surface 142. The second temperature-resistant wall surface 142 is located inside the second load-bearing casing 141, and a flow passage communicating with the post-transition section 130 is formed by the second temperature-resistant wall surface 142. This flow passage is a part of the gas passage 150. At the same time, the second temperature-resistant wall surface 142 and the second load-bearing casing 141 are spaced apart in the radial direction, so as to form a fourth cooling water chamber 143 between the second load-bearing casing 141 and the second temperature-resistant wall surface 142.

[0053] Optionally, the cooling water in the fourth cooling water chamber 143 can use circulating water. At this time, the cooling water is not injected into the gas passage 150. Correspondingly, the exhaust section 140 is provided with an inlet and an outlet that communicate with the fourth cooling water chamber 143. Or, the cooling water in the fourth cooling water chamber 143 can also use spray water. At this time, the cooling water entering the fourth cooling water chamber 143 enters the gas passage 150.

[0054] Figure 5 is the structural schematic diagram of the post-transition section 130 provided in this embodiment, Figure 6 is Figure 5 the sectional structure schematic diagram at C-C in, Figure 7 is Figure 5 the sectional structure schematic diagram at D-D in, Figure 8 is Figure 5 the sectional structure schematic diagram at E-E in. Please refer to Figures 1-8 , in this embodiment, the post-transition section 130 is connected between the post-measurement section 120 and the exhaust section 140. Since the post-measurement section 120 is fan-shaped and the exhaust section 140 is circular, the post-transition section 130 needs to realize the transformation from fan to circle.

[0055] Specifically, the rear transition section 130 includes a sector-shaped pipe section 132, a circular pipe section 138, and a connecting flat plate 133. The sector-shaped pipe section 132 is a pipe section with a sector-shaped cross-section, and the circular pipe section 138 is a pipe section with a circular cross-section. The internal space formed by the sector-shaped pipe section 132 and the circular pipe section 138 is part of the gas passage 150. One end of the sector-shaped pipe section 132 is used to connect with the rear measurement section 120, and one end of the circular pipe section 138 is used to connect with the exhaust section 140. The other end of the sector-shaped pipe section 132 and the other end of the circular pipe section 138 are connected by the connecting flat plate 133. Specifically, the sector-shaped pipe section 132 is fixedly connected to the radially inner end of the connecting flat plate 133, and the circular pipe section 138 is fixedly connected to the radially outer end of the connecting flat plate 133. In this way, the connection between the sector-shaped pipe section 132 and the circular pipe section 138 is realized through the connecting flat plate 133. And because the connecting flat plate 133 is a flat plate structure, the sector-to-circle transition of the rear transition section 130 is of a sudden-expansion type.

[0056] The rear transition section 130 further includes a heat insulation baffle 134 fixedly connected to the sector-shaped pipe section 132. The heat insulation baffle 134 shields the connecting flat plate 133, thereby blocking the high-temperature gas in the circular pipe section 138 from contacting the connecting flat plate 133 through the heat insulation baffle 134 and reducing the heat load borne by the connecting flat plate 133. The heat insulation baffle 134 and the connecting flat plate 133 are spaced apart to form a cooling water channel 136 therebetween. A first cooling water cavity 1323 is formed inside the sector-shaped pipe section 132, and a first spray hole 1324 communicating with the first cooling water cavity 1323 is opened on the sector-shaped pipe section 132. The cooling water in the first cooling water cavity 1323 sprays out from the first spray hole 1324, thereby impacting the heat insulation baffle 134 and performing impingement cooling on the heat insulation baffle 134. The radially outer end of the heat insulation baffle 134 is spaced from the inner wall of the circular pipe section 138 to form an opening 137 communicating the cooling water channel 136 with the internal space of the circular pipe section 138. In this way, after the cooling water that sprays out from the first spray hole 1324 to impact and cool the heat insulation baffle 134 enters the cooling water channel 136, it enters the internal space of the circular pipe section 138 through the opening 137. Through the above cooling structure setting, effective cooling of the sector-to-circle transition is specifically realized, greatly improving the ability of the rear transition section 130 to withstand extremely high-temperature and high-pressure gas, so that the high-temperature and high-pressure gas at the outlet of the sector-shaped combustion chamber can be safely guided to the exhaust section 140 through the rear transition section 130.

[0057] Specifically, the sector-shaped pipe section 132 has a sector segment load-bearing casing 1321 and a sector segment temperature-resistant wall 1322 sleeved with each other. The sector segment temperature-resistant wall 1322 is located inside the sector segment load-bearing casing 1321, so as to form a first cooling water cavity 1323 between the sector segment temperature-resistant wall 1322 and the sector segment load-bearing casing 1321. The radially inner end of the heat insulation baffle 134 is fixedly connected to the sector segment temperature-resistant wall 1322.

[0058] It should be noted that in the description of this embodiment, "radial direction" refers to the direction perpendicular to the gas passage 150 and approaching or departing from the gas passage 150. The "radial inner end" of a component refers to the end of the component close to the gas passage 150. Correspondingly, the "radial outer end" of a component refers to the end of this part far from the gas passage 150.

[0059] Optionally, the heat insulation baffle 134 can be fixedly connected to the sector pipe section 132 by means of welding, bolt connection, etc.

[0060] Furthermore, the number of the first spray holes 1324 is multiple, and the multiple first spray holes 1324 are distributed at intervals along the circumference of the sector pipe section 132. In this way, impact cooling is carried out on all circumferential parts of the heat insulation baffle 134 through the multiple first spray holes 1324 to ensure the cooling effect of all parts of the heat insulation baffle 134.

[0061] Figure 9 It is a schematic structural diagram of the heat insulation baffle 134 in the rear transition section 130 provided in this embodiment. Please refer to Figures 1-9 In this embodiment, a diversion part 135 is arranged on the heat insulation baffle 134. The cooling water in the cooling water channel 136 is guided by the diversion part 135 to flow towards the opening 137, and then enters the inner space of the circular pipe section 138 (which is a part of the gas passage 150) through the opening 137.

[0062] Optionally, the diversion part 135 is a convex structure fixedly connected to the side of the heat insulation baffle 134 facing the connecting flat plate 133. Specifically, as Figure 9 shown, the diversion part 135 is a plurality of straight strip-shaped protrusions extending along the up-down direction of the heat insulation baffle 134. Optionally, the diversion part 135 can be fixedly connected to the heat insulation baffle 134 by means of welding, etc., and can also be integrally formed by means of machining, etc.

[0063] In this embodiment, the rear transition section 130 and the rear measurement section 120 are fixedly connected by a flange, and the rear transition section 130 and the exhaust section 140 are also fixedly connected by a flange. Specifically, one end of the sector pipe section 132 far from the circular pipe section 138 has a first connecting flange 131, and one end of the rear measurement section 120 far from the test section 114 has a second connecting flange 124. The first connecting flange 131 and the second connecting flange 124 are fixedly connected together by fasteners such as connecting bolts 160 to realize the connection between the rear transition section 130 and the rear measurement section 120.

[0064] The first connecting flange 131 is provided with a second spray hole 1325 communicating with the first cooling water cavity 1323. The second spray hole 1325 is used to spray cooling water into the connection gap between the first connecting flange 131 and the second connecting flange 124. On the one hand, it can cool the first connecting flange 131 and the second connecting flange 124. On the other hand, since the second spray hole 1325 is located upstream of the rear transition section 130, the gas temperature entering the rear transition section 130 can be reduced, thereby reducing the thermal load borne by the rear transition section 130.

[0065] Specifically, the first connection hole is also provided with a bolt hole for installing the connection bolt 160. The first spray hole 1324 is closer to the inner cavity of the sector pipe section 132 than the bolt hole. In this way, after the rear transition section 130 is connected to the rear measurement section 120, the first spray hole 1324 is located inside the connection bolt 160.

[0066] One end of the circular pipe section 138 away from the sector pipe section 132 has a third connecting flange 139. One end of the exhaust section 140 is provided with a fourth connecting flange 144. The third connecting flange 139 and the fourth connecting flange 144 are fixedly connected together by fasteners such as connection bolts 160 to realize the connection between the rear transition section 130 and the exhaust section 140. The cooling water entering the internal space of the circular pipe section 138 through the opening 137 can reduce the gas temperature in the circular pipe section 138, thereby reducing the thermal load of the circular pipe section 138 and the third connecting flange 139 provided thereon.

[0067] In this embodiment, a second cooling water cavity 1383 is also provided in the circular pipe section 138. Specifically, the circular pipe section 138 includes a circular pipe bearing casing 1381 and a circular pipe heat-resistant wall 1382 which are sleeved with each other. The circular pipe heat-resistant wall 1382 is located inside the circular pipe bearing casing 1381, and the circular pipe heat-resistant wall 1382 encloses an internal space which is part of the gas passage 150. At the same time, a second cooling water cavity 1383 is formed by enclosing between the circular pipe heat-resistant wall 1382 and the circular pipe bearing casing 1381.

[0068] Optionally, the second cooling water cavity 1383 can use circulating water, that is, the second cooling water cavity 1383 is independent of the internal space of the circular pipe section 138, and the cooling water in the second cooling water cavity 1383 does not enter the gas passage 150. Correspondingly, at this time, the circular pipe section 138 needs to be provided with inlets and outlets for the cooling water to enter and leave the second cooling water cavity 1383. The second cooling water cavity 1383 can also use spray water, that is, the second cooling water cavity 1383 is communicated with the internal space of the circular pipe section 138 through spray holes, so that the cooling water in the second cooling water cavity 1383 enters the internal space of the circular pipe section 138 through the spray holes, thereby cooling the gas in the circular pipe section 138 and reducing the thermal load of downstream components.

[0069] The rear transition section 130 and the sector combustion chamber tester 100 provided by the embodiments of the present invention, during use, the high-temperature and high-pressure gas generated by the test section 114 sequentially enters the exhaust section 140 through the rear measurement section 120 and the rear transition section 130. The rear measurement section 120 is cooled through the third cooling water chamber 123, the exhaust section 140 is cooled through the fourth cooling water chamber 143, the sector pipe section 132 is cooled through the first cooling water chamber 1323, and the circular pipe section 138 is cooled through the second cooling water chamber 1383. An insulating baffle 134 parallel to the connecting plate 133 is arranged downstream of the sector pipe section 132. The insulating baffle 134 blocks the contact between the connecting plate 133 and the high-temperature gas, thereby reducing the heat load borne by the connecting plate 133. At the same time, a first spray hole 1324 facing the circular pipe section 138 in the gas flow direction is arranged on the sector pipe section 132. The first spray hole 1324 sprays water towards the insulating baffle 134 to achieve impingement cooling. The cooling water sprayed onto the insulating baffle 134 enters the cooling channel formed between the insulating baffle 134 and the connecting plate 133 and flows towards the opening 137 along the guiding portion 135 on the insulating baffle 134, and finally enters the gas channel 150 from the opening 137, further avoiding the influence of the high-temperature gas on the connecting plate 133 and the insulating baffle 134. Moreover, a second spray hole 1325 facing the second connecting flange 124 of the rear measurement section 120 is arranged on the sector pipe section 132. Water is sprayed through the second spray hole 1325 into the gap between the first connecting flange 131 and the second connecting flange 124, thereby realizing the cooling of the connecting flange. At the same time, since the position of this connecting flange is upstream of the rear transition section 130, the gas temperature entering the rear transition section 130 can be reduced, and thus the heat load received by the rear transition section 130 can be reduced.

[0070] For the rear transition section 130 and the sector combustion chamber tester 100 provided by the embodiments of the present invention, the fan-to-round form adopted by the rear transition section 130 has a sudden expansion feature, and at the same time, a combined cooling method of spray water + impact baffle + circulating water is adopted, effectively ensuring the efficient cooling of the rear transition section 130, enabling it to withstand high-temperature and high-pressure (≮2100K, ≮4MPa) gas, and safely guiding the high-temperature and high-pressure gas at the outlet of the sector combustion chamber to the exhaust section 140 of the tester.

[0071] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A rear transition section, which is used to connect the rear measurement section and the exhaust pipe; characterized in that: The post-transfer section comprises: A fan-shaped pipe section, one end of which is used to be connected to the rear measurement section; a first cooling water cavity is formed inside the fan-shaped pipe section; A circular pipe segment, one end of which is used to be connected to the exhaust pipe; A connecting plate, wherein the radial inner end of the connecting plate is fixedly connected to the other end of the sector-shaped pipe segment, and the radial outer end of the connecting plate is fixedly connected to the other end of the circular pipe segment; and A heat-insulating baffle, the heat-insulating baffle is fixedly connected to the fan-shaped pipe segment, and a cooling water channel is formed between the heat-insulating baffle and the connecting plate; the radial outer end of the heat-insulating baffle is spaced from the inner wall of the circular pipe segment to form an opening connecting the cooling water channel and the inner space of the circular pipe segment; The fan-shaped pipe segment is provided with a first spray hole, which is used to spray cooling water in the first cooling water cavity to impact the heat insulation baffle and enter the inner space of the circular pipe segment through the cooling water channel and the opening.

2. The rear transition section according to claim 1, characterized in that: The heat insulation baffle is provided with a guide portion, and the guide portion is used to guide the cooling water in the cooling water channel to flow toward the opening.

3. The rear transition section according to claim 2, characterized in that: The guide portion is a protruding structure fixedly connected to the side of the heat insulation baffle facing the connecting flat plate.

4. The rear transition section according to claim 1, characterized in that: There are multiple first spray holes, and the multiple first spray holes are distributed at intervals along the periphery of the fan-shaped pipe segment.

5. The rear transition section according to claim 1, characterized in that: The end of the sector-shaped pipe section away from the circular pipe section has a first connecting flange, and the first connecting flange is used to be fixedly connected to the second connecting flange of the rear measuring section; The first connecting flange is provided with a second spray hole connected to the first cooling water chamber, and the second spray hole is used to spray the cooling water into the connecting gap between the first connecting flange and the second connecting flange.

6. The rear transition section according to claim 5, characterized in that: There are multiple second spray holes, and the multiple second spray holes are distributed at intervals along the periphery of the fan-shaped pipe segment.

7. The rear transition section according to claim 5, characterized in that: The first connecting flange is also provided with a bolt hole, and the first connecting flange is used to be fixedly connected to the second connecting flange through connecting bolts, and the first spray hole is closer to the inner cavity of the fan-shaped pipe section than the bolt hole.

8. The rear transition section according to claim 1, characterized in that: A second cooling water chamber is also provided in the circular pipe section.

9. The rear transition section according to claim 8, characterized in that: The second cooling water chamber is independent from the internal space of the circular pipe segment; or, The second cooling water chamber is communicated with the inner space of the circular pipe segment through the spray hole, so that the cooling water in the second cooling water chamber enters the inner space of the circular pipe segment through the spray hole.

10. A sector combustion chamber tester, characterized in that: The sector combustion chamber tester comprises a test section, a rear measurement section, an exhaust section and a rear transition section as described in any one of claims 1 to 9; the test section, the rear measurement section, the rear transition section and the exhaust section are connected in sequence.

11. The sector combustion chamber tester according to claim 10, characterized in that: The rear measuring section comprises a load-bearing casing and a temperature-resistant wall surface which are sleeved with each other, and a third cooling water cavity is formed between the load-bearing casing and the temperature-resistant wall surface.

12. The sector combustion chamber tester according to claim 10, characterized in that: The exhaust section comprises a load-bearing casing and a temperature-resistant wall surface which are sleeved with each other, and a fourth cooling water cavity is formed between the load-bearing casing and the temperature-resistant wall surface.

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