CN110763474A - Combustion chamber test device - Google Patents
Combustion chamber test device Download PDFInfo
- Publication number
- CN110763474A CN110763474A CN201810822463.4A CN201810822463A CN110763474A CN 110763474 A CN110763474 A CN 110763474A CN 201810822463 A CN201810822463 A CN 201810822463A CN 110763474 A CN110763474 A CN 110763474A
- Authority
- CN
- China
- Prior art keywords
- section
- test
- flange
- channel
- gas
- 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.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
Abstract
The invention relates to a combustion chamber test device, which comprises a test section (2) and an exhaust measurement section (3), wherein the test section (2) comprises a casing and a flame tube arranged in the casing and used for gas combustion, the casing is connected with the flame tube at the outlet end of the test section (2) through a fixing plate (202), and a gas-introducing channel is arranged on the fixing plate; the exhaust measurement section (3) is arranged at the outlet end of the test section (2) and is used for detecting parameters of the airflow at the outlet of the test section (2); the bleed air channel is used for guiding the gas between the casing and the flame tube out to the exhaust measuring section (3), and a cooling gas film is formed on the inner wall surface of the exhaust measuring section (3). The testing device of the invention fully utilizes the existing testing gas, not only solves the problem of discharging the bleed air between the casing and the flame tube, but also utilizes the bleed air between the casing and the flame tube to cool the exhaust measurement section, thus reducing the testing cost and ensuring the safe and reliable operation of the exhaust measurement section.
Description
Technical Field
The invention relates to the field of aero-engine tests, in particular to a combustion chamber test device.
Background
At present, the combustor part is developed mainly in accordance with the modes of single-head test, multi-head sector test and full-ring test, and the combustor part scheme is verified and optimized. In the three test modes, combustion performance tests including an outlet temperature distribution test, a pollutant discharge test, a combustion efficiency test and the like are required. The performance test of the combustion chamber is different from the common flow heat exchange test, and the performance test of the combustion chamber cannot be replaced by a low-temperature low-pressure test or a medium-temperature medium-pressure test according to a similar rule, so that the performance of the combustion chamber is a high-temperature high-pressure test, and the import test parameters need to be the same as or close to the design parameters of components as much as possible.
Along with the continuous improvement of the thrust-weight ratio of the engine, the temperature rise of the combustion chamber is also continuously improved, so that a combustion chamber test piece body (a test section) and an exhaust measurement section connected with the test section in a combustion chamber test are required to bear the scouring of high-temperature and high-pressure gas, and a severe cooling problem is faced; in the test of the fan-shaped combustion chamber, because of the particularity of the fan-shaped structure, high stress areas are easy to appear in four corner areas at the joint of the flange and the cylinder of the fan-shaped combustion chamber tester, and the strength requirement cannot be met.
Disclosure of Invention
The embodiment of the invention provides a combustion chamber test device, which can more conveniently cool an exhaust measurement section of the test device.
To achieve the above object, a first aspect of embodiments of the present invention provides a combustion chamber test apparatus, including:
the test section comprises a casing and a flame tube arranged in the casing and forming a gas combustion area, the casing is connected with the flame tube at the outlet end of the test section through a fixing plate, and a gas-guiding channel is arranged on the fixing plate; and
the exhaust measurement section is arranged at the outlet end of the test section and is used for detecting parameters of the airflow at the outlet of the test section;
the bleed air channel is used for guiding the gas between the casing and the flame tube into the exhaust measuring section, and a cooling gas film is formed on the inner wall surface of the exhaust measuring section.
Furthermore, the flame tube comprises an inner tube wall and an outer tube wall, the casing comprises an inner casing and an outer casing, and the air-entraining channel comprises a first channel and a second channel;
the first channel is arranged in a region, located between the inner cylinder wall and the inner casing, on the fixing plate so as to lead the bleed air of the inner annular cavity to the exhaust measuring section; the second channel is arranged in the area, located between the outer cylinder wall and the outer casing, of the fixing plate, and guides the bleed air of the outer annular cavity to the exhaust measurement section.
Furthermore, the total sectional areas of the first channel and the second channel are adjustable, so that the flow distribution proportion of the gas at the outlet of the flame tube, the bleed air of the inner ring cavity and the bleed air of the outer ring cavity is adjusted to meet a preset proportion range.
Further, the combustion chamber test device further comprises a threaded plug, and the first channel and/or the second channel comprise a threaded hole so that the cross-sectional area of the channel can be changed by screwing the threaded plug into or out of the threaded hole.
Further, the bleed air passage is a hole, slot or through slot.
Further, the first channel comprises at least one row of holes arranged at intervals along the circumferential direction of the test section, the second channel comprises a plurality of seams arranged at intervals along the circumferential direction of the test section, and a single seam extends along the circumferential direction of the test section.
Further, a preset gap is kept between the bleed air channel and the inner wall surface of the exhaust measuring section in the radial direction.
Furthermore, a first flange is arranged at the outlet end of the test section, a second flange is arranged at the inlet end of the exhaust measurement section, and the test section and the exhaust measurement section are installed in a butt joint mode through the first flange and the second flange; and cooling channels are arranged on the first flange and the second flange and used for introducing cooling media to carry out cooling.
Further, the cooling channel is arranged around the whole circumference of the first flange and the second flange, a medium inlet is formed in the lower portion of the cooling channel, and a medium outlet is formed in the upper portion of the cooling channel.
Further, the combustion chamber test apparatus further comprises:
temperature detection members provided in pairs at positions corresponding to the first flange and the second flange in the circumferential direction; and
and the control component is used for adjusting the introduction amount of the cooling medium in the cooling channel under the condition that the difference of the temperature detection values between the paired temperature detection components is judged to exceed a preset temperature value.
Further, the test section includes test main part section and first flange, and the section is measured including measuring main part section and second flange to the exhaust, and test main part section is fan-shaped structure with measuring main part section, and fan-shaped structure includes outer wall, inner wall and linkage segment, and outer wall and inner wall set up with one heart, and the both ends of outer wall and inner wall are all sealed through the linkage segment, and the linkage segment is arc.
Further, the test section comprises a test main body section and a first flange, the exhaust measurement section comprises a measurement main body section and a second flange, and reinforcing ribs are arranged between the test main body section and the first flange and between the measurement main body section and the second flange.
Further, the exhaust gas measuring section comprises a measuring main body section, the measuring main body section comprises an inner lining and an outer lining, a plurality of protruding portions are arranged on the outer wall of the inner lining along the circumferential direction, and a channel for leading cooling media into is formed between every two adjacent protruding portions.
Furthermore, an opening is formed in the exhaust measuring section and is sealed through a cover plate, a parameter measuring component is arranged on the inner side of the cover plate, and the detection part of the parameter measuring component extends to a position close to the outlet of the flame tube.
Based on the technical scheme, the combustor test device provided by the embodiment of the invention has the advantages that the casing is connected with the flame tube at the outlet end of the test section through the fixing plate, and the fixing plate is provided with the air-entraining channel which is used for guiding out the gas between the casing and the flame tube and forming the cooling air film on the inner wall surface of the exhaust measurement section. The structure for cooling the exhaust measurement section fully utilizes the existing test gas, not only solves the problem of discharging bleed air between the casing and the flame tube, but also utilizes the bleed air between the casing and the flame tube to cool the exhaust measurement section, does not need to additionally arrange a bleed air discharge structure, reduces the requirement on the material used for the exhaust measurement section, can reduce the test cost, reduces the influence of high-temperature and high-pressure gas on the exhaust measurement section, and ensures the safe and reliable work of the exhaust measurement section.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is an axial cross-sectional view of one embodiment of a combustor test rig of the present invention;
FIG. 2 is an enlarged view of the combustor test rig shown in FIG. 1 at A;
FIG. 3 is a cross-sectional view B-B of the combustor test rig shown in FIG. 1;
FIG. 4 is a cross-sectional view C-C of the combustor test apparatus shown in FIG. 1.
Detailed Description
The present invention is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature considered to be preferred or advantageous may be combined with one or more other features considered to be preferred or advantageous.
The terms "first", "second", and the like in the present invention are merely for convenience of description to distinguish different constituent elements having the same name, and do not denote a sequential or primary-secondary relationship.
In the description of the present invention, the directions or positional relationships indicated by "upper", "lower", "top", "bottom", "front", "rear", "inner" and "outer" and the like are used based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention, and do not indicate or imply that the device referred to must have a specific direction, be constructed in a specific direction and be operated, and thus, should not be construed as limiting the scope of the present invention.
As shown in fig. 1 to 4, the present invention provides a combustion chamber test apparatus, in one embodiment, an intake measurement section 1, a test section 2, and an exhaust measurement section 3 are sequentially provided in a flow direction of an air flow.
Wherein, be equipped with the inlet channel in the measurement section 1 of admitting air, the entrance point of experimental section 2 is equipped with diffuser 101, and diffuser 101 is along the gradual increase of airflow direction sectional area, and diffuser 101 and inlet channel intercommunication, gaseous letting in behind the inlet channel of measurement section 1 of admitting air follow diffuser 101 outflow again. Most of the gas discharged from the diffuser 101 enters the flame tube from the head of the combustion chamber, and the high-temperature and high-pressure gas generated by combustion is discharged from the outlet of the flame tube and enters the exhaust measurement section 3 to realize measurement; part of the gas 102 bypasses a fuel oil rod 221 of the fuel oil nozzle 220 in the test section 2 and enters an outer annular cavity formed by the casing and the flame tube; part of the gas 103 enters an inner annular cavity formed by the casing and the flame tube. And the wall surface of the flame tube is provided with circulation holes for leading the gas in the outer ring cavity and the gas in the inner ring cavity to enter the flame tube for cooling.
The combustor test rig shown in fig. 1 is provided with a plurality of fuel nozzles 220, which is a multi-headed combustor test rig. The combustion chamber test apparatus of the present invention is also applicable to a single head. Also, the combustion chamber may be a fan-shaped or a full-ring-shaped combustion chamber. FIG. 1 shows a multi-head sector combustor test rig.
The air intake measuring section 1 is used for measuring conditions of intake air, including total temperature and total pressure of intake air, and the like, and a plurality of detection points can be arranged in the direction of air flow in the air intake measuring section 1 for measuring the total temperature and the total pressure so as to reflect the air intake conditions more accurately and objectively.
The exhaust gas measurement section 3 is used for measuring parameters of the combustion chamber exhaust gas, including temperature, pressure and/or pollutant emissions of the exhaust gas. For example, a plurality of detection points may be arranged in the exhaust measurement section 3 close to the outlet of the flame tube along the circumferential direction or the radial direction, so as to reflect the exhaust parameter distribution more accurately and comprehensively. Wherein, the circumferential direction and the radial direction are determined by taking the circumferential direction and the radial direction of the combustion chamber as a reference.
In an exemplary embodiment, as shown in fig. 1 and 2, the test section 2 includes a casing, a flame tube disposed in the casing for combustion of gas, and a fixing plate 202, the casing and the flame tube are connected at an outlet end of the test section 2 by the fixing plate 202, the fixing plate 202 is used for supporting and fixing the flame tube, and a bleed air passage is disposed on the fixing plate 202. The exhaust measuring section 3 is arranged at the outlet end of the test section 2 and is used for detecting parameters of the airflow at the outlet of the test section 2. The bleed air channel is used for directly guiding the gas between the casing and the flame tube into the exhaust measurement section 3, and a cooling gas film is formed on the inner wall surface of the exhaust measurement section 3.
Because the gas in the outer ring cavity and the inner ring cavity formed between the casing and the flame tube is not combusted, the temperature is lower than that of the gas in the flame tube, and the cooling mode of introducing the gas between the casing and the flame tube to the inner wall of the exhaust measurement section is equivalent to forming a layer of cooling gas film on the inner wall surface of the exhaust measurement section, so that the wall surface of the exhaust measurement section is effectively isolated from high-temperature gas. It has at least one of the following advantages:
(1) the influence of high-temperature and high-pressure fuel gas on the exhaust measurement section is reduced, the exhaust measurement section is guaranteed to work safely and reliably, and the cooling requirement that the high-temperature fuel temperature of the existing combustion chamber test is higher and higher to the exhaust measurement section can be met.
(2) The requirement on the high-temperature resistance of the material used in the exhaust measurement section is reduced, so that the test cost is reduced.
(3) The existing test gas is fully utilized, the problem of discharging bleed air between the casing and the flame tube is solved, the bleed air between the casing and the flame tube is utilized to cool the exhaust measurement section, a bleed air discharging structure is not required to be additionally arranged, and the structure of the test device can be simplified.
Referring to fig. 1 to 4, the flame tube includes an inner tube wall 205 and an outer tube wall 206, and both ends of the inner tube wall 205 and the outer tube wall 206 are connected to each other by a side tube wall 212. The casing includes an inner casing 209 and an outer casing 210, and the bleed air passage includes a first passage 203 and a second passage 204. A first channel 203 is provided in the fastening plate 202 in the region between the inner cylinder wall 205 and the inner housing 209 in order to guide the inner annular chamber bleed air 105 to the exhaust-gas measuring section 3. A second channel 204 is provided in the fastening plate 202 in the region between the outer cylinder wall 206 and the outer casing 210 in order to lead the outer annular chamber bleed air 106 to the exhaust-gas measuring section 3. The first channel 203 and the second channel 204 are opened to reserve a bolt mounting space between the flame tube and the fixing plate 202.
For the fan-shaped and full-annular combustion chambers, an inner annular cavity and an outer annular cavity are arranged between the casing and the flame tube, and air inlets with a certain proportion are distributed in the two parts of spaces, and the inner wall surfaces of the inner and outer rings of the exhaust measurement section 3 can be cooled simultaneously by arranging the first channel 203 and the second channel 204, so that the cooling effect is enhanced, and the work of the exhaust measurement section 3 is more reliable; but also can improve the utilization rate of the existing test gas.
When the test device works, part of the gas 103 entering the inner ring cavity enters the flame tube from the circulation hole on the inner wall 205 of the flame tube to form inner ring flame tube cooling gas for cooling the inner wall 205 of the flame tube, and part of the gas enters the exhaust measurement section 3 from the first channel 203 to form the inner ring cavity bleed gas 105 so as to form a cooling gas film on the inner side wall of the inner ring of the exhaust measurement section 3.
The gas 102 entering the outer ring cavity partially enters the flame tube from the flow holes on the outer wall 206 of the flame tube to form outer ring flame tube cooling gas for cooling the outer wall 206 of the flame tube, and partially enters the exhaust measurement section 3 from the second channel 204 to form an outer ring cavity bleed gas 106 so as to form a cooling gas film on the inner side wall of the outer ring of the exhaust measurement section 3.
Before the high-temperature high-pressure test, a flow distribution test needs to be carried out to measure the gas distribution proportion of each part of the combustion chamber test so as to meet the normal working requirement of the combustion chamber. As shown in fig. 1, the flow distribution ratios of the gas 104 at the outlet of the flame tube, the inner annular chamber bleed air 105 and the outer annular chamber bleed air 106 meet a preset ratio range. The gas 104 at the outlet of the flame tube is high-temperature combustion gas which is combusted, the inner annular chamber bleed gas 105 is cooling gas which is led out from the first channel 203, and the outer annular chamber bleed gas 106 is cooling gas which is led out from the second channel 204.
To ensure that the test is consistent with the characteristics of the combustor product, the ratio of the liner outlet gases 104, the inner annulus bleed air 105 and the outer annulus bleed air 106 should also be consistent with or similar to the design of the combustor product. In order to meet the requirements of the test, the total cross-sectional areas of the first channel 203 and the second channel 204 are adjustable, and if the internal and external ring cavity bleed air does not meet the requirements, the cross-sectional areas of the first channel 203 and the second channel 204 can be changed, and the flow rates of the internal ring cavity bleed air 105 and the external ring cavity bleed air 106 are adjusted, so that the flow distribution proportion of each path of gas meets the requirements. For example, if the bleed air passage is a bleed air hole, the proportion of the gas distribution in each path can be adjusted by enlarging or blocking the hole.
Preferably, the combustion chamber test apparatus of the present invention may further comprise a threaded plug, and the first channel 203 and/or the second channel 204 comprise a threaded hole, so that the cross-sectional area of the channel is changed by screwing the threaded plug into or out of the threaded hole. This embodiment is when carrying out the flow distribution experiment, is convenient for adjust each way gas flow proportion, easy operation, and it is convenient to dismantle, need not to carry out reprocess to the part.
The bleed air passage in each of the above embodiments may take a variety of configurations, such as holes, slots, through slots, or the like. The hole can be a round hole, a square hole or a special-shaped hole, and the hole can be a smooth hole or a threaded hole. The slits may take the form of straight, arcuate or profiled elongate tracks. The groove can be a kidney-shaped groove or a rectangular groove and the like.
As shown in the sectional view B-B of fig. 3, the combustion chamber has a fan-shaped structure, and as can be seen from fig. 1, the outlet of the flame tube is inclined upward such that the radial width of the fixing plate 202 in the region between the outer tube wall 205 and the outer casing 210 is small, and the radial width of the fixing plate 202 in the region between the inner tube wall 206 and the inner casing 209 is large.
For the structure, the first channel 203 includes at least one row of holes radially arranged along the test section 2, each row of holes are circumferentially spaced along the test section 2, the second channel 204 includes a plurality of slots circumferentially spaced along the test section 2, and a single slot extends circumferentially along the test section 2. The bleed air channel with the structure can fully utilize the area of the fixing plate 202 and ensure the strength of the fixing plate 202 as much as possible. This solution is merely an example, and the design of the bleed air duct is determined and implemented according to the overall structural space of the test section 2.
In order to form a stable cooling air film, a predetermined gap is maintained in the radial direction between the edge of the bleed air passage and the inner wall surface of the exhaust gas measuring section 3. Preferably, the bleed air channel is located in a profile formed by the inner wall surface of the exhaust measurement section 3 in the radial direction, and the distance between the outermost edge of the bleed air channel and the inner wall surface of the exhaust measurement section 3 can be 0.5 mm-3 mm, so as to ensure that a good air film coverage is formed on the inner wall surface of the exhaust measurement section 3.
In some embodiments, as shown in fig. 1, the outlet end of the test section 2 is provided with a first flange 201, the inlet end of the exhaust gas measurement section 3 is provided with a second flange 301, and the test section 2 and the exhaust gas measurement section 3 are installed in an abutting manner through the first flange 201 and the second flange 301, and can be fixed by arranging a plurality of fasteners at intervals along the circumferential direction. In order to improve the positioning accuracy during installation, a concave-convex matching structure can be arranged between the first flange 201 and the second flange 301 for positioning. The first flange 201 and the second flange 301 are provided with cooling channels for introducing a cooling medium for cooling, for example, the cooling medium may be cooling water or other liquid, or alternatively cooling gas.
This embodiment is simultaneously to the first flange 201 of test section 2 and the second flange 301 of exhaust measurement section 3 cooling simultaneously to guarantee that the temperature field of both is relatively close, avoid two flanges to produce discordance deformation because the temperature field is inconsistent and cause the gas leakage of high temperature high pressure gas between the flange, can improve the gas tightness of test section 2 and the 3 junctions of exhaust measurement section, thereby guarantee that the experiment can go on safely and reliably.
In addition, the inlet ends of the front measuring section 1 and the test section 2 can be installed in a flange butt joint mode.
In a specific embodiment, the cooling channels are arranged around the entire circumference of the first flange 201 and the second flange 301, and the cooling channels are provided with a medium inlet at the lower part and a medium outlet at the upper part. After the cooling medium is introduced from the medium inlet, the cooling medium flows upwards along the cooling channels on the two sides and flows out from the medium outlet.
The structure that the cooling channel is arranged in a surrounding manner can fully cool the flange part, and the temperature uniformity of all parts of the flange in the circumferential direction is improved; and the cooling medium is led in from the lower part and led out from the upper part, so that the flowing speed of the cooling medium can be reduced, the cooling medium can be accumulated to fully absorb the heat of the flange, and the cooling uniformity and the cooling efficiency are improved.
As shown in fig. 1, a first cooling passage 291 is provided inside the first flange 201 along the entire circumference, a first medium inlet 292 is provided at the bottom of the first flange 201, and a first medium outlet 293 is provided at the top. The second cooling channel 391 is arranged in the second flange 301 along the whole circumference, the bottom of the second flange 301 is provided with a second medium inlet 392, and the top is provided with a second medium outlet 393.
In some embodiments, the combustor test apparatus of the present invention further comprises a temperature sensing component and a control component. The temperature detection components are arranged at the corresponding positions of the first flange 201 and the second flange 301 in the circumferential direction in pairs and used for detecting the temperature of the positions. For example, the temperature detection means may employ a thermocouple. The control component is used for adjusting the introduction amount of the cooling medium in the cooling channel under the condition that the difference of the temperature detection values between the paired temperature detection components is judged to exceed a preset temperature value.
This embodiment can carry out adjustment cooling medium's the volume of letting in real time according to the temperature detection result to make the temperature of first flange 201 and second flange 301 controllable, thereby guarantee that the temperature field between two flanges is more close, can improve the gas tightness of two flange joints, avoid high temperature high pressure gas to leak, and then guarantee that the experiment can go on safely and reliably.
Preferably, the temperature detecting members are provided in a plurality of pairs at intervals along the circumferential direction of the first flange 201 and the second flange 301, so as to more objectively reflect the overall temperature of the flanges. In the actual control process, the introduction amount of the cooling medium can be adjusted when the difference between the temperature detection values of the pair of temperature detection components exceeds a preset temperature value; the amount of the cooling medium introduced may be adjusted when the difference between the plurality of pairs of temperature detection values exceeds a preset temperature value.
As shown in fig. 4, a plurality of temperature detection members are disposed on the outer periphery of the first flange 201, for example, the end surface of the first flange 201 is fan-shaped, the first temperature detection member 213, the second temperature detection member 214, and the third temperature detection member 215 are disposed on the outer side wall of the first flange 201, the first temperature detection member 213 and the second temperature detection member 214 are disposed on the outer side wall at positions close to both ends, and the third temperature detection member 215 is disposed at a middle position of the outer side wall. A fourth temperature detection member 216 is provided at an intermediate position of an inner side wall of the first flange 201.
Accordingly, the end surface of the second flange 301 is also formed in a fan shape, and a fifth temperature detection member 305, a sixth temperature detection member 306, a seventh temperature detection member 307, and an eighth temperature detection member 308 are provided in this order at positions corresponding to the first flange 201 on the second flange 301.
The test apparatus is not limited to the arrangement of the temperature detection components shown in fig. 3 and 4, and if the temperature difference between the temperature detection components arranged in pairs on the first flange 201 and the second flange 301 exceeds 50K during the test, the flow rate of the cooling medium in the first flange 201 and/or the second flange 301 needs to be adjusted to be lower than 50K. The paired temperature detection parts include: first 213 and fifth 305, second 214 and sixth 306, third 215 and seventh 307, and fourth 216 and eighth 308 temperature detection means.
In some embodiments, as shown in fig. 3, the test section 2 includes a test main body section and a first flange 201, the exhaust measurement section 3 includes a measurement main body section and a second flange 301, the measurement main body section is a fan-shaped structure, the fan-shaped structure includes an outer wall, an inner wall and a connecting section, the outer wall and the inner wall are concentrically arranged, both ends of the outer wall and the inner wall are sealed by the connecting section, and the connecting section is in a circular arc shape.
Further, the connecting section is in smooth transition with the outer wall and the inner wall respectively.
Preferably, the ratio of the diameter of the connecting sections at the two sides to the difference value of the radiuses of the outer wall and the inner wall is 1.0-1.5.
In general, in a conventional fan-shaped combustion chamber test device, the test section 2 and the exhaust gas measurement section are both designed into regular fan shapes (i.e., concentric inner and outer circular arcs of the same sector and two straight side walls are formed together). Although there may be some angular rounding at the four corners, due to the particularity of the fan-shaped structure, it still causes the high stress area at the four corner regions where the fan-shaped test main body segment is connected with the first flange 201 and where the main body segment is connected with the second flange 301, especially at the first flange 201, and when the first flange 201 and the second flange 301 are deformed by high temperature, the high stress area is further amplified.
According to the embodiment of the invention, the connecting sections at two sides are integrally designed into the circular arc shape and are in smooth transition with the outer wall and the inner wall, so that the local high-stress area of the fan-shaped structure can be reduced, the strength of the test device is improved, the stable and reliable work of the test device can be ensured, the test can be safely carried out, and the risk of the subsequent full-ring test is reduced.
Further, as shown in fig. 3 and 4, the test section 2 includes a test main body section and a first flange 201, the exhaust gas measuring section 3 includes a measuring main body section and a second flange 301, and reinforcing ribs are disposed between the test main body section and the first flange 201 and between the measuring main body section and the second flange 301. This embodiment further reduces the high stress areas by providing stiffening ribs, reducing the high stress between the test body segment and the first flange 201 and between the measurement body segment and the second flange 301, in particular at the four corners of the test segment 2.
Specifically, as shown in fig. 3, first reinforcing ribs 207, 208 are respectively provided at corner regions of the fan-shaped structure of the test section 2; and second reinforcing ribs 302 are respectively arranged at the four corners of the fan-shaped structure of the exhaust measuring section 3.
In some embodiments, as shown in fig. 3, the exhaust gas measuring section 3 comprises a measuring body section comprising an inner liner 303 and an outer liner 304, a cooling cavity is formed between the inner liner 303 and the outer liner 304 for introducing a cooling medium to cool the exhaust gas measuring section 3. The temperature of the exhaust gas measuring section 3 can be further reduced, and the working reliability of the testing device is improved.
Further, a plurality of projections 309 are circumferentially provided on the outer wall of the inner liner 303, the free ends of the projections 309 contact the outer liner 304, and channels for introducing a cooling medium are formed between adjacent projections 309. The embodiment can enable the cooling medium to flow more uniformly in the cooling cavity, and improve the uniformity of the temperature of the exhaust measuring section 3.
As shown in fig. 3 and 4, the casing of the test section 2, the inner liner 303 and the outer liner 304 of the exhaust gas measurement section 3 can be designed into a structure with two side connection sections being fan-shaped, the fan-shaped structure can be integral, such as the inner liner 303 and the outer liner 304 of the exhaust gas measurement section 3 shown in fig. 3, or can be a segmented structure, such as the casing of the test section 2 shown in fig. 4. For example, in the segmented structure of fig. 4, the casing includes an outer casing 210, an inner casing 209, and two side casing segments 211 with arc-shaped sides, and the segments can be connected by welding or other fasteners, and the connection position should avoid the high stress area.
In some embodiments, the exhaust gas measuring section 3 is provided with an opening, which is closed by a cover plate 310 in a state of normal non-use. When the airflow parameters of the flame tube outlet need to be determined through tests, the cover plate 310 with the parameter measuring component arranged on the inner side is replaced, and the detection part of the parameter measuring component extends to a position close to the flame tube outlet. For example, the parameter measuring unit has a support rod with an L-shape, one end of the support rod is connected to the inner side of the cover plate 310, and the other end is provided with a detecting unit. The detection component is used for detecting the temperature, the pressure and the pollution degree of airflow at the outlet of the flame tube.
In order to measure the airflow parameters at the outlet of the flame tube completely and accurately, a plurality of parameter measuring components can be arranged at intervals in the radial direction and the circumferential direction of the exhaust gas measuring section 3.
The combustion chamber test apparatus provided by the present invention has been described in detail. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to aid in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (14)
1. A combustor test apparatus, comprising:
the testing section (2) comprises a casing and a flame tube arranged in the casing to form a gas combustion area, the casing is connected with the flame tube at the outlet end of the testing section (2) through a fixing plate (202), and a gas-guiding channel is arranged on the fixing plate (202); and
the exhaust measurement section (3) is arranged at the outlet end of the test section (2) and is used for detecting parameters of the airflow at the outlet of the test section (2);
the bleed air channel is used for guiding the gas between the casing and the flame tube out to the exhaust measuring section (3), and a cooling gas film is formed on the inner wall surface of the exhaust measuring section (3).
2. The combustor test apparatus of claim 1, wherein the flame tube comprises an inner (205) and an outer (206) cylinder wall, the casing comprises an inner (209) and an outer casing (210), the bleed air passage comprises a first (203) and a second (204) passage;
wherein the first channel (203) is arranged in a region of the fastening plate (202) between the inner cylinder wall (206) and the inner casing (209) for conducting the inner annulus bleed air (105) to the exhaust-gas measurement section (3); the second channel (204) is arranged in a region of the fastening plate (202) between the outer cylinder wall (205) and the outer casing (210) for discharging the outer annular chamber bleed air (106) to the exhaust-gas measuring section (3).
3. The combustor test apparatus of claim 2, wherein the first channel (203) and the second channel (204) each have an adjustable total cross-sectional area to adjust a flow distribution ratio of the liner outlet gas (104), the inner annulus bleed air (105), and the outer annulus bleed air (106) to a predetermined ratio range.
4. The combustion chamber test apparatus as claimed in claim 3, further comprising a threaded plug, wherein the first channel (203) and/or the second channel (204) comprises a threaded hole, such that screwing in or out of the threaded hole by the threaded plug changes the cross-sectional area of the channel.
5. The combustor test apparatus of claim 1, wherein the bleed air passage is a hole, slot or through slot.
6. The combustor test apparatus of claim 2, wherein the first channel (203) comprises at least one row of holes spaced circumferentially along the test section (2), and the second channel (204) comprises a plurality of slots spaced circumferentially along the test section (2), a single slot extending circumferentially along the test section (2).
7. The combustor test rig according to claim 1, characterized in that a predetermined gap is maintained in radial direction between the bleed air channel and the inner wall surface of the exhaust gas measuring section (3).
8. The combustor test device as claimed in claim 1, wherein the outlet end of the test section (2) is provided with a first flange (201), the inlet end of the exhaust gas measurement section (3) is provided with a second flange (301), and the test section (2) and the exhaust gas measurement section (3) are installed in a butt joint mode through the first flange (201) and the second flange (301); and cooling channels are arranged on the first flange (201) and the second flange (301) and are used for introducing cooling media for cooling.
9. The combustor test rig of claim 8, wherein the cooling channel is arranged around the entire circumference of the first flange (201) and the second flange (301), and wherein the cooling channel is provided with a medium inlet at a lower portion and a medium outlet at an upper portion.
10. The combustor test apparatus of claim 8, further comprising:
temperature detection members provided in pairs at positions corresponding to the first flange (201) and the second flange (301) in the circumferential direction; and
and the control component is used for adjusting the introduction amount of the cooling medium in the cooling channel under the condition that the difference of the temperature detection values between the pair of temperature detection components is judged to exceed a preset temperature value.
11. The combustor test unit of claim 1, wherein the test section (2) comprises a test main section and a first flange (201), the exhaust measurement section (3) comprises a measurement main section and a second flange (301), the test main section and the measurement main section are of a fan-shaped structure, the fan-shaped structure comprises an outer wall, an inner wall and a connecting section, the outer wall and the inner wall are concentrically arranged, both ends of the outer wall and the inner wall are sealed by the connecting section, and the connecting section is of an arc shape.
12. The combustor test rig of claim 1, wherein the test section (2) comprises a test body section and a first flange (201), the exhaust gas measurement section (3) comprises a measurement body section and a second flange (301), and reinforcing ribs are provided between the test body section and the first flange (201) and between the measurement body section and the second flange (301).
13. The combustor test unit according to claim 1, wherein the exhaust gas measuring section (3) comprises a measuring body section, the measuring body section comprises an inner liner (303) and an outer liner (304), a plurality of projections (309) are arranged on the outer wall of the inner liner (303) along the circumferential direction, and channels for introducing cooling medium are formed between adjacent projections (309).
14. The combustor test device as claimed in claim 1, wherein the exhaust gas measuring section (3) is provided with an opening, the opening is closed by a cover plate (310), the inner side of the cover plate (310) is provided with a parameter measuring component, and a detection part of the parameter measuring component extends to a position close to the outlet of the flame tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810822463.4A CN110763474B (en) | 2018-07-25 | 2018-07-25 | Combustion chamber test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810822463.4A CN110763474B (en) | 2018-07-25 | 2018-07-25 | Combustion chamber test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110763474A true CN110763474A (en) | 2020-02-07 |
| CN110763474B CN110763474B (en) | 2021-08-13 |
Family
ID=69326908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810822463.4A Active CN110763474B (en) | 2018-07-25 | 2018-07-25 | Combustion chamber test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110763474B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111649953A (en) * | 2020-07-23 | 2020-09-11 | 中国航发湖南动力机械研究所 | Sand dust deposition test device |
| CN111829011A (en) * | 2019-04-17 | 2020-10-27 | 中国航发商用航空发动机有限责任公司 | Combustion chamber |
| CN112903302A (en) * | 2021-01-22 | 2021-06-04 | 南京航空航天大学 | CMC flame tube test box and test method thereof |
| CN113757720A (en) * | 2021-09-18 | 2021-12-07 | 北京航空航天大学 | Combustion oscillation control device, method and combustion chamber |
| CN114112406A (en) * | 2021-11-30 | 2022-03-01 | 中国航发湖南动力机械研究所 | Test device for measuring cooling hole of flame tube |
| CN114216685A (en) * | 2021-10-20 | 2022-03-22 | 中国航发四川燃气涡轮研究院 | Main combustion chamber component test piece for simulating radial velocity field of outlet of gas compressor |
| CN114484498A (en) * | 2022-01-25 | 2022-05-13 | 中国航发贵阳发动机设计研究所 | Fan-shaped combustion chamber structure |
| CN114739458A (en) * | 2022-04-18 | 2022-07-12 | 中国航发沈阳发动机研究所 | Double-channel high-temperature measurement structure for simulating afterburner inlet flow field |
| CN115200046A (en) * | 2021-04-14 | 2022-10-18 | 中国航发商用航空发动机有限责任公司 | Full-ring combustion chamber test device and test method thereof |
| CN115307921A (en) * | 2022-07-24 | 2022-11-08 | 哈尔滨工程大学 | Visual combustion test device and test method |
| CN115371081A (en) * | 2021-05-18 | 2022-11-22 | 中国航发商用航空发动机有限责任公司 | Measuring section behind combustion chamber and cooling method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201251198Y (en) * | 2008-07-03 | 2009-06-03 | 中国航空动力机械研究所 | Gas turbine combustor |
| US20100162713A1 (en) * | 2008-12-31 | 2010-07-01 | Shui-Chi Li | Cooled flameholder swirl cup |
| CN102128719A (en) * | 2010-12-13 | 2011-07-20 | 中国航空动力机械研究所 | Sectorial reverse flow combustor and split combustor case thereof |
| CN102788699A (en) * | 2012-07-23 | 2012-11-21 | 中国兵器工业集团第七0研究所 | Flame tube structure of thrust combustion chamber used for supercharger test |
| CN203907671U (en) * | 2014-06-03 | 2014-10-29 | 贵州黎阳天翔科技有限公司 | Combustor device of large-area smoke disinfection and epidemic prevention equipment |
| CN205909346U (en) * | 2016-07-29 | 2017-01-25 | 中国航空工业集团公司沈阳发动机设计研究所 | Combustion chamber |
-
2018
- 2018-07-25 CN CN201810822463.4A patent/CN110763474B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201251198Y (en) * | 2008-07-03 | 2009-06-03 | 中国航空动力机械研究所 | Gas turbine combustor |
| US20100162713A1 (en) * | 2008-12-31 | 2010-07-01 | Shui-Chi Li | Cooled flameholder swirl cup |
| CN102128719A (en) * | 2010-12-13 | 2011-07-20 | 中国航空动力机械研究所 | Sectorial reverse flow combustor and split combustor case thereof |
| CN102788699A (en) * | 2012-07-23 | 2012-11-21 | 中国兵器工业集团第七0研究所 | Flame tube structure of thrust combustion chamber used for supercharger test |
| CN203907671U (en) * | 2014-06-03 | 2014-10-29 | 贵州黎阳天翔科技有限公司 | Combustor device of large-area smoke disinfection and epidemic prevention equipment |
| CN205909346U (en) * | 2016-07-29 | 2017-01-25 | 中国航空工业集团公司沈阳发动机设计研究所 | Combustion chamber |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829011A (en) * | 2019-04-17 | 2020-10-27 | 中国航发商用航空发动机有限责任公司 | Combustion chamber |
| CN111649953A (en) * | 2020-07-23 | 2020-09-11 | 中国航发湖南动力机械研究所 | Sand dust deposition test device |
| CN112903302A (en) * | 2021-01-22 | 2021-06-04 | 南京航空航天大学 | CMC flame tube test box and test method thereof |
| CN115200046B (en) * | 2021-04-14 | 2023-09-26 | 中国航发商用航空发动机有限责任公司 | Full-ring combustion chamber test device and test method thereof |
| CN115200046A (en) * | 2021-04-14 | 2022-10-18 | 中国航发商用航空发动机有限责任公司 | Full-ring combustion chamber test device and test method thereof |
| CN115371081A (en) * | 2021-05-18 | 2022-11-22 | 中国航发商用航空发动机有限责任公司 | Measuring section behind combustion chamber and cooling method thereof |
| CN113757720A (en) * | 2021-09-18 | 2021-12-07 | 北京航空航天大学 | Combustion oscillation control device, method and combustion chamber |
| CN114216685A (en) * | 2021-10-20 | 2022-03-22 | 中国航发四川燃气涡轮研究院 | Main combustion chamber component test piece for simulating radial velocity field of outlet of gas compressor |
| CN114112406A (en) * | 2021-11-30 | 2022-03-01 | 中国航发湖南动力机械研究所 | Test device for measuring cooling hole of flame tube |
| CN114484498A (en) * | 2022-01-25 | 2022-05-13 | 中国航发贵阳发动机设计研究所 | Fan-shaped combustion chamber structure |
| CN114739458A (en) * | 2022-04-18 | 2022-07-12 | 中国航发沈阳发动机研究所 | Double-channel high-temperature measurement structure for simulating afterburner inlet flow field |
| CN114739458B (en) * | 2022-04-18 | 2023-11-03 | 中国航发沈阳发动机研究所 | Dual-channel high-temperature measurement structure for simulating afterburner inlet flow field |
| CN115307921A (en) * | 2022-07-24 | 2022-11-08 | 哈尔滨工程大学 | Visual combustion test device and test method |
| CN115307921B (en) * | 2022-07-24 | 2023-08-25 | 哈尔滨工程大学 | Visual combustion test device and test method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110763474B (en) | 2021-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110763474B (en) | Combustion chamber test device | |
| US8166764B2 (en) | Flow sleeve impingement cooling using a plenum ring | |
| US8899049B2 (en) | System and method for controlling combustor operating conditions based on flame detection | |
| US8726631B2 (en) | Dual walled combustors with impingement cooled igniters | |
| US8800289B2 (en) | Apparatus and method for mixing fuel in a gas turbine nozzle | |
| US9316155B2 (en) | System for providing fuel to a combustor | |
| US7010921B2 (en) | Method and apparatus for cooling combustor liner and transition piece of a gas turbine | |
| US8590314B2 (en) | Combustor liner helical cooling apparatus | |
| EP2378200A2 (en) | Combustor liner cooling at transition duct interface and related method | |
| US7802431B2 (en) | Combustor liner with reverse flow for gas turbine engine | |
| US10197285B2 (en) | Gas turbine engine wall assembly interface | |
| US20160047317A1 (en) | Fuel injector assemblies in combustion turbine engines | |
| RU2711897C1 (en) | Assembly of annular combustion chamber of gas turbine engine | |
| JP2010169093A (en) | Turbulated combustor rear-end liner assembly and related cooling method | |
| CN103635750B (en) | Rational late lean injection | |
| US20130298564A1 (en) | Cooling system and method for turbine system | |
| US20110239654A1 (en) | Angled seal cooling system | |
| JP2013250047A (en) | Combustor with multiple combustion zones with injector placement for component durability | |
| US11808662B2 (en) | Device for sealingly repositioning and cooling an air flow measuring element within an operating turbomachine | |
| CN112577750B (en) | Air inlet heating device for aircraft engine complete machine test | |
| RU2342551C2 (en) | Aviation gas-turbine engine | |
| CN102933798A (en) | Turbine inlet nozzle guide vane mounting structure for radial gas turbine engine | |
| US20130040254A1 (en) | System and method for monitoring a combustor | |
| CN212108499U (en) | Floating seal ring sleeve for thermal expansion compensation of combustion chamber of gas turbine | |
| CN109781421A (en) | A kind of rear measurement group section for loopful combustion chamber ignition performance test |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |