CN116834964A - C-shaped guide wall for narrow-body ground test vehicle - Google Patents
C-shaped guide wall for narrow-body ground test vehicle Download PDFInfo
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- CN116834964A CN116834964A CN202310683526.3A CN202310683526A CN116834964A CN 116834964 A CN116834964 A CN 116834964A CN 202310683526 A CN202310683526 A CN 202310683526A CN 116834964 A CN116834964 A CN 116834964A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F1/00—Ground or aircraft-carrier-deck installations
- B64F1/26—Ground or aircraft-carrier-deck installations for reducing engine or jet noise; Protecting airports from jet erosion
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Abstract
The invention provides a C-shaped guide wall for a narrow-body ground test, which comprises an arc-shaped section guide wall, wherein the arc length of the arc-shaped section guide wall is 51868-66996mm; the chord width of the arc-shaped section guide wall is 50080-64415mm, the width of the narrow body aircraft body is less than 4.72m, the air flow generated by the aircraft engine with the diffusion angle of +/-35 DEG can be fully covered, the length of the arc-shaped section guide wall can cover the reflected air flow with the diffusion angle of +/-35 DEG, and the reflected air flow of the aircraft engine is close to the aircraft; and then can not cause the air current to strike to staff or building in safe region, guarantee the security of taking a trial run when taking a trial run.
Description
Technical Field
The invention relates to the field of aviation equipment, in particular to a C-shaped guide wall for a narrow-body ground test vehicle.
Background
When the civil aircraft tests on the ground, a large amount of high-temperature high-speed air flow is generated at the tail of the aircraft, and noise generated when the aircraft tests on the ground can disturb the people, so that the aircraft is sound pollution. The existing civil aircraft comprises two types of wide-body aircraft and narrow-body aircraft, wherein the narrow-body aircraft is a single-aisle passenger aircraft with the width of the aircraft body being less than 4.72 meters, the number of seats in each row in a passenger cabin is not more than 6, the wide-body aircraft is a single-aisle passenger aircraft with the width of the aircraft body being not less than 4.72 meters, and two channels are arranged in the passenger cabin, and the two types of aircraft have different application scenes due to different width parameters of the two types of aircraft, for example, the wide aircraft is more biased to be loaded with containerized goods, and the flow direction of air flow sprayed out from the tail of the aircraft is changed by using a guide wall generally; the original guide wall is linearly arranged, and the diffusion angle of the air flow output by the tail nozzle of the aircraft engine is +/-35 degrees, and when the incident air flow is reflected in the guide wall, the reflected air flow flows to the side surface of the aircraft along the direction far away from the aircraft as shown in the figure 1; thereby causing impact to staff or buildings at two sides of the guide wall.
On the basis, the guide wall is arranged in an arc shape, and the number of the guide wall is 201510332465.1 in Chinese patent application; patent document with publication day 2017.10.10 discloses a noise reduction guide wall for an aircraft ground test vehicle; the guide wall is arranged in a curve in the length direction and surrounds the outer side of the air flow emitted when the aircraft tests, the guide wall comprises a wall body which is connected to the ground foundation in an anchoring manner, the windward surface of the wall body is in an arc shape which can guide the air flow obliquely upwards into the air, the leeward surface of the wall body is connected with a supporting truss in an anchoring manner, and the bottom of the supporting truss is connected to the ground foundation in an anchoring manner; the wall body sequentially comprises a stainless steel micropore plate, a sound absorption plate, a sound insulation plate, a cavity layer and a back sealing plate from the windward side to the leeward side.
However, in the prior art, if the arc length and chord width of the arc-shaped guide wall are too short, and then the air flow output by the engine is reflected by the arc-shaped guide wall, a part of the air flow passes over the guide wall from two sides of the guide wall, so that the air flow is impacted to staff or a building behind the guide wall; after the other part of air flow is reflected by the arc-shaped guide wall, the air flow still flows to the side surface of the aircraft, so that the impact is caused to staff or buildings at the two sides of the guide wall; so that the existing guide wall can not completely cover the air flow with the diffusion angle of +/-35 degrees; when the existing guide wall is used for ground test, the potential safety hazard is great, and if the arc length and chord width of the arc guide wall are too long, the occupied area is large, and the installation is inconvenient.
Disclosure of Invention
The invention provides a C-shaped guide wall for a narrow-body ground test vehicle, which can fully cover air flow generated by an aircraft engine with a diffusion angle of +/-35 degrees, so that personnel in a safety area can not be impacted by the air flow.
In order to achieve the above purpose, the technical scheme of the invention is as follows: a C-shaped flow guide wall for a narrow-body ground test comprises an arc-shaped section flow guide wall, wherein the arc length of the arc-shaped section flow guide wall is 51868-66996mm; the chord width of the arc section guide wall is 50080-64415mm.
And determining the chord width B1 of the guide wall of the arc section by the sum of the span length of the two wings of the narrow machine body and the safety distance reserved by the two wings extending outwards respectively.
And determining the end position of the guide wall of the arc section through the chord width B1, wherein the engine of the narrow machine body generates the reflected air flow generated by the outermost air flow after encountering the arc section under the maximum diffusion angle, and the reflected air flow is arranged at the outer side of the wing of the corresponding narrow machine body.
The circle center corresponding to the arc-shaped section is on a straight line extending from the tail port of the APU of the narrow machine body to the aircraft nose.
The engine of the narrow organism produces the reflection air current that the air current that produces outside after meetting the arc section under the biggest diffusion angle is located the inboard of first safety line, and first safety line is located the straight line that the both ends of arc section guide wall extend to aircraft nose direction along the length direction of aircraft.
The arc length of the arc-shaped section guide wall is 51868-66996mm; the chord width of the arc section guide wall is 50080-64415mm, and the width of the narrow body machine body is less than 4.72m.
The arrangement ensures that the chord width B1 of the arc-shaped section guide wall is determined according to the safety distance between the two wings of the aircraft, so that the arc-shaped section guide wall can block the air flow generated by the aircraft, the engine of the wide engine body generates the reflected air flow generated by the outermost air flow after encountering the arc-shaped section at the maximum diffusion angle, which is positioned at the inner side of the first safety line and at the outer side of the corresponding wide engine wing, so that the air flow reflected by the outermost air flow after encountering the arc-shaped section guide wall at the maximum diffusion angle can not have excessive influence on the wings of the narrow engine, and the reflected air flow generated by the air flow in the outermost air flow at the maximum diffusion angle can not have excessive influence on personnel or buildings at one side of the narrow engine, and the reflected air flow generated by the air flow in the outermost air flow at the maximum diffusion angle is guided out from the upper end through the arc-shaped section guide wall due to the fact that the reflected air flow is close to the airframe of the narrow engine body, a small part of reflected air flows out from two sides under the drive of the emitted air flow, so that the outermost air flow at the maximum diffusion angle is positioned in a safety area, and a small part of reflected air flows out from two sides also flow out from the safety area under the drive of the outermost air flow at the maximum diffusion angle, meanwhile, the chord width is more than 1.80 times of that of a narrow body machine body through specific parameter setting of the chord length and the chord width, and the chord width of the narrow body machine body is relatively smaller due to the fact that the length of the narrow body machine body is relatively smaller, so that the whole chord length and chord width are not too large, the occupied area is larger, and the length of the arc-section guide wall can cover the reflected air flow with the diffusion angle of +/-35 degrees, so that the reflected air flow approaches to an airplane; and then can not cause the air current to strike to staff or building in safe region, guarantee the security of taking a trial run when taking a trial run.
Further, the outer arc radius of the arc-shaped section guide wall is 133800mm, and the inner arc radius of the arc-shaped section guide wall is 130000mm.
By the arrangement, the arc length is determined through the outer arc radius and the inner arc radius, so that the narrow machine body can meet the arc length setting requirement.
Further, the arc width of the arc section guide wall is 3800mm.
The arc width is determined through the outer arc radius and the inner arc radius, so that the narrow machine body can meet the arc length setting requirement.
Further, the arc length of the arc-shaped section guide wall is 66996mm, and the chord width of the arc-shaped section guide wall is 64415mm.
The arc length and chord width can meet the safety performance requirement of the B757-200 narrow machine body.
Further, the arc length of the arc-shaped section guide wall is 62674mm, and the chord width of the arc-shaped section guide wall is 60338mm.
The arc length and chord width can meet the safety performance requirement of the A321 narrow machine body.
Further, the arc length of the arc-shaped section guide wall is 58351mm, and the chord width of the arc-shaped section guide wall is 56246mm.
The arc length and chord width can meet the safety performance requirement of the narrow body of B737-900.
Further, the shortest distance between the tail port of the APU of the wide machine body and the guide wall is 7500mm.
The setting can meet the requirement of determining the safety position of the tail port of the APU of the narrow body machine.
Further, the arc section guide wall includes the wall body and is used for supporting the support of wall body, and the wall body sets up for the arc along the length direction of wall body, and the support includes the arc skeleton, and the arc skeleton sets up along the direction of height arc of wall body, and the inside arc setting down of arc skeleton, and the engine of narrow body machine produces the emission air current that the air current produced of the outside under the biggest diffusion angle for the engine of narrow body machine is the emission air current that the air current of the outside is along wall body length direction formation under the biggest diffusion angle.
The device is characterized in that the device comprises an arc-shaped cavity and an arc-shaped framework, wherein the arc-shaped cavity and the arc-shaped framework are arranged through the arc-shaped guide wall, reflected air flow formed by the arc-shaped guide wall can come out from the upper end and two sides, and the outermost air flow under the maximum diffusion angle can be led out from the safety areas on the two sides.
Drawings
FIG. 1 is a schematic view of the reflection of a narrow engine airflow in a linear guide wall.
Fig. 2 is a schematic diagram of a test run of an a380 narrow body machine in example 1.
FIG. 3 is a schematic reflection of the engine airflow of a narrow body machine in the present invention.
Fig. 4 is a top view of an arc segment guide wall.
Fig. 5 is a side view of an arcuate segment guide wall.
FIG. 6 is a left view airflow analysis model diagram of the arc-shaped section guide wall of the invention.
FIG. 7 is a front view of the flow guide wall of the arc segment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1-5; a C-shaped guide wall for a narrow-body ground test comprises an arc-shaped section guide wall 1.
Example 1.
As shown in fig. 2 and 3, the arc length A1 of the arc-shaped section guide wall is 66996mm, and the chord width B1 of the arc-shaped section guide wall is 64415mm; the outer arc radius D1 of the arc-shaped section guide wall is 133800mm, the inner arc radius E of the arc-shaped section guide wall is 130000mm, and the arc width F of the arc-shaped section guide wall is 3800mm.
And determining the chord width B1 of the arc-shaped section guide wall by the sum of the span length J1 of the two wings of the airplane and the safety distance M1 reserved by the two wings extending outwards respectively. The preset safety distance M is smaller than 30000mm, and has different values according to different models.
The end position of the arc-shaped section guide wall is determined through chord width B1, the engine of the narrow body machine generates the reflected air flow generated by the engine of the narrow body machine after encountering the arc-shaped section under the maximum diffusion angle outside the wing of the corresponding narrow body machine, specifically, the air flow Z1 generated by the engine of the wide body machine is provided with a normal Y1 perpendicular to the end part of the arc-shaped section guide wall at the intersection point of the arc-shaped section guide wall, and the reflected air flow Z2 of the air flow generated by the engine of the aircraft is determined through the normal Y2.
The engine of narrow body machine produces the reflection air current that produces outside air current after meetting the arc section under the biggest diffusion angle and is located the inboard of first safety line, and first safety line is located the straight line that the both ends of arc section guide wall extend to aircraft nose direction along the length direction of aircraft, specifically, is equipped with the first safety line Y3 that extends along the length direction of aircraft on the both ends of arc section guide wall, is safe region in the outside of first safety line Y3, the reflection air current Z2 of the air current that the engine of aircraft produced is located the inboard of first safety line Y3.
The intersection point of the extended line of the tail port of the APU passing through the airplane and the guide wall of the arc section is provided with a second auxiliary line Y2, and the second auxiliary line Y2 is perpendicular to the length direction of the airplane; the arc length A1 of the guide wall of the arc section is determined by the included angle alpha between the second auxiliary line Y2 and the reflected air flow Z2, and the angle alpha is more than or equal to 90 degrees and less than 180 degrees.
The chord width B1 of the arc-shaped section guide wall is determined according to the safety distance between the two wings of the aircraft and the outside, so that the arc-shaped section guide wall can block the air flow generated by the aircraft, and the arc length A1 of the arc-shaped section guide wall is set according to the included angle alpha between the second auxiliary line and the reflected air flow, so that the length of the arc-shaped section guide wall can cover the reflected air flow with the diffusion angle of +/-35 degrees, and the reflected air flow approaches to the aircraft; and then can not cause the air current to strike to staff or building in safe region, guarantee the security of taking a trial run when taking a trial run.
The embodiment is compatible with a narrow body machine with the model number of B757-200 for test run.
Taking B7757-200 as an example, the total length I1 of the B757-200 narrow body machine is 48033mm, the span length J1 is 37959mm, and the outlet airflow diffusion angle K of the tail nozzle of the engine is +/-35 degrees; when the B757-200 narrow body machine is used for ground test, the distance L between the tail port of the APU of the B757-200 narrow body machine and the guide wall of the arc section is 7500mm; the distance O between the front nose wheel stop line of the B757-200 narrow body machine and the arc-shaped section guide wall is 49640mm.
The size of the C-shaped guide wall is set; the outer arc radius D1 of the preset arc-shaped section guide wall is 133800mm, the inner arc radius E of the arc-shaped section guide wall is 130000mm, and the arc width F of the arc-shaped section guide wall is 3800mm.
And setting the chord width of the arc section guide wall in the C-shaped guide wall according to the size of the B757-200 narrow body machine. The chord width B1 of the arc-shaped section guide wall required by the test of the narrow body machine B757-200 is 64415mm through the length 37959mm of the span length of the narrow body machine B757-200, the length 13228mm of the left reserved safety distance M and the length 13228mm of the right reserved safety distance M. The arc length is 66996mm by measuring the chord width, the position of the center of the arc length and the position of the reflected air flow formed under the maximum diffusion angle.
As shown in fig. 4 and 5, the arc-shaped section guide wall comprises a wall body 1 and a bracket 2 for supporting the wall body 1; the length direction of the wall body 1 is formed by connecting more than two diversion noise reduction assemblies 3, the top view of the wall body 1 is in arc-shaped arrangement, the diversion noise reduction assemblies 3 are in the prior art, and the bracket 2 comprises an arc-shaped framework 21, upright posts 22 and a supporting assembly; the diversion noise reduction assembly is arranged on the arc-shaped framework. One end of the upright post 22 is connected with the arc-shaped framework 21; the upright post 22 and the arc-shaped framework 21 are obliquely arranged; the arc framework 21 is arranged to extend downwards and inwards along the height direction of the arc framework to form an arc shape, and the arc framework extends along the length direction of the upright post 22; the distance between the upright post 22 and the arc-shaped framework 21 is gradually increased; the support component is connected between the upright 22 and the arc-shaped framework 21; a fixing piece 211 is arranged at the bottom end of the arc-shaped framework 21; in use, the fixing member 211 and one end of the post 22 are fixed to the ground. The support assembly comprises a first support 231, a second support 232 and a third support 233; triangular structures are formed between the first support 231 and the second support 232, and between the second support 232 and the third support 233. The support is thus stable.
The arc-shaped framework is supported by the upright posts which are obliquely arranged; the support is stable; the arc-shaped framework can resist the impact of wake flow; the shaking caused by insufficient supporting force on the arc-shaped framework is avoided; and thus causes interference with resonance.
The air flow of the engine acts on the arc-shaped section guide wall, and a part of the air flow flows along the height direction of the arc-shaped section guide wall; the other part of the air flow flows along the length direction of the guide wall of the arc section.
Example 2.
As shown in fig. 2 and 3, the arc length A1 of the arc-shaped section guide wall is 62674mm, and the chord width B1 of the arc-shaped section guide wall is 60338mm; the outer arc radius D1 of the arc-shaped section guide wall is 133800mm, the inner arc radius E of the arc-shaped section guide wall is 130000mm, and the arc width F of the arc-shaped section guide wall is 3800mm.
The embodiment is compatible with narrow body machines with the models of A321, A320-100 and A320-200 for test run.
Taking an A321 narrow body machine as an example, the total machine length of the A321 narrow body machine I1 is 44507mm, the span length J1 is 34150mm, and the output airflow diffusion angle K of the engine tail nozzle is +/-35 degrees; when the A321 narrow body machine is subjected to ground test, the distance L between the tail port of the APU of the A321 narrow body machine and the guide wall of the arc section is 7500mm; the distance O between the front nose wheel stop line of the A321 narrow body machine and the arc-shaped section guide wall is 40023mm.
The size of the C-shaped guide wall is set; the outer arc radius D1 of the preset arc-shaped section guide wall is 133800mm, the inner arc radius E of the arc-shaped section guide wall is 130000mm, and the arc width F of the arc-shaped section guide wall is 3800mm.
And setting the chord width of the arc section guide wall in the C-shaped guide wall according to the size of the A321 narrow body machine. The span length J1 of the A321 narrow body machine is 34150mm, the length 13094mm of the reserved safety distance M on the left side is equal to the length 13094mm of the reserved safety distance M on the right side, and finally the chord width B1 of the arc-shaped section guide wall required by the test run of the A321 narrow body machine is 60338mm.
Taking an A320-100 narrow body machine as an example, the total machine length of the A320-100 narrow body machine is 37593mm, the span length is 33910mm, the diffusion angle of the output airflow of the tail nozzle of the engine is +/-35 degrees, and the length of the reserved safety distance M is 12192mm; according to the calculation mode of the first embodiment, the chord width of the arc section guide wall required by the test run of the A320-100 narrow body machine is 58294mm.
Taking an A320-200 narrow body machine as an example, the total machine length of the A320-200 narrow body machine is 37593mm, the span length is 33910mm, the diffusion angle of the output airflow of the tail nozzle of the engine is +/-35 degrees, and the length of the reserved safety distance M is 12192mm; according to the calculation mode of the first embodiment, the chord width of the arc section guide wall required by the test run of the A320-200 narrow body machine is 58294mm.
Because the wingspan length of the A321 narrow body machine is longer than that of the A320-100 narrow body machine, the A320-100 narrow body machine and the A320-200 narrow body machine; the difference value between the chord width required by the test run of the A320-100 narrow body machine and the A320-200 narrow body machine and the chord width required by the test run of the A321 narrow body machine is smaller than 2500mm; the chord widths required by the A320-100 narrow body machine, the A320-200 narrow body machine and the A321 narrow body machine for test run are relatively close, so that the dimension of the C-shaped guide wall in the embodiment 2 is compatible with the A320-100 narrow body machine, the A320-200 narrow body machine and the A321 narrow body machine for test run.
As shown in fig. 4 and 5, the arc-shaped section guide wall comprises a wall body 1 and a bracket 2 for supporting the wall body 1; the length direction of the wall body 1 is formed by connecting more than two diversion noise reduction assemblies 3, the top view of the wall body 1 is in arc-shaped arrangement, the diversion noise reduction assemblies 3 are in the prior art, and the bracket 2 comprises an arc-shaped framework 21, upright posts 22 and a supporting assembly; the diversion noise reduction assembly is arranged on the arc-shaped framework. One end of the upright post 22 is connected with the arc-shaped framework 21; the upright post 22 and the arc-shaped framework 21 are obliquely arranged; the arc framework 21 is arranged to extend downwards and inwards along the height direction of the arc framework to form an arc shape, and the arc framework extends along the length direction of the upright post 22; the distance between the upright post 22 and the arc-shaped framework 21 is gradually increased; the support component is connected between the upright 22 and the arc-shaped framework 21; a fixing piece 211 is arranged at the bottom end of the arc-shaped framework 21; in use, the fixing member 211 and one end of the post 22 are fixed to the ground. The support assembly comprises a first support 231, a second support 232 and a third support 233; triangular structures are formed between the first support 231 and the second support 232, and between the second support 232 and the third support 233. The support is thus stable.
The arc-shaped framework is supported by the upright posts which are obliquely arranged; the support is stable; the arc-shaped framework can resist the impact of wake flow; the shaking caused by insufficient supporting force on the arc-shaped framework is avoided; and thus causes interference with resonance.
The air flow of the engine acts on the arc-shaped section guide wall, and a part of the air flow flows along the height direction of the arc-shaped section guide wall; the other part of the air flow flows along the length direction of the guide wall of the arc section.
Example 3.
As shown in fig. 2 and 3, the arc length A1 of the arc-shaped section guide wall is 58351mm, and the chord width B1 of the arc-shaped section guide wall is 56246mm; the outer arc radius D1 of the arc-shaped section guide wall is 133800mm, the inner arc radius E of the arc-shaped section guide wall is 130000mm, and the arc width F of the arc-shaped section guide wall is 3800mm.
The embodiment is compatible with narrow body machines with the models of B737-300, B737-600, B737-700, B737-800, B737-900 and A319 for test run.
Taking a model B737-300 narrow body machine as an example, the total machine length of the B737-300 narrow body machine I1 is 32766mm, the span length J1 is 28887mm, and the output airflow diffusion angle K of the engine tail nozzle is +/-35 degrees; when the B737-300 narrow body machine is subjected to ground test, the distance L between the tail port of the APU of the B737-300 narrow body machine and the guide wall of the arc section is 7500mm; the distance O between the front nose wheel stop line of the B737-300 narrow body machine and the arc-shaped section guide wall is 36261mm.
The size of the C-shaped guide wall is set; the outer arc radius D1 of the preset arc-shaped section guide wall is 133800mm, the inner arc radius E of the arc-shaped section guide wall is 130000mm, and the arc width F of the arc-shaped section guide wall is 3800mm.
And setting the chord width of the arc section guide wall in the C-shaped guide wall according to the size of the B737-300 narrow body machine. The chord width B1 of the arc-shaped section guide wall required by the test run of the B737-300 narrow body machine is 53167mm through the span length J1 of the B737-300 narrow body machine being 28887mm, the length 12140mm of the left reserved safety distance M and the length 12140mm of the right reserved safety distance M.
Taking a B737-600 narrow body machine as an example, the total length of the B737-600 narrow body machine I1 is 30877mm, the span length J1 is 34300mm, the output airflow diffusion angle K of the tail nozzle of the engine is +/-35 degrees, and the length of the reserved safety distance M is 7890mm; according to the calculation mode of the first embodiment, the chord width of the arc section guide wall required by the test run of the B737-600 narrow body machine is 50080mm.
Taking a B737-700 narrow body machine as an example, the total machine length of the B737-700 narrow body machine I1 is 33503mm, the wingspan length J1 is 35780mm, the output airflow diffusion angle K of the tail nozzle of the engine is +/-35 degrees, and the length of the reserved safety distance M is 9207mm; according to the calculation mode of the first embodiment, the chord width of the arc section guide wall required by the test run of the B737-700 narrow body machine is 54194mm.
Taking a B737-800 narrow body machine as an example, the total machine length of the B737-800 narrow body machine I1 is 39133mm, the wingspan length J1 is 34316mm, the output airflow diffusion angle K of the tail nozzle of the engine is +/-35 degrees, and the length of the reserved safety distance M is 9939mm; according to the calculation mode of the first embodiment, the chord width of the arc section guide wall required by the test run of the B737-800 narrow body machine is 54194mm.
Taking a B737-900 narrow body machine as an example, the total machine length of the B737-900 narrow body machine I1 is 41784mm, the span length J1 is 34309mm, the output airflow diffusion angle K of the tail nozzle of the engine is +/-35 degrees, and the length of the reserved safety distance M is 10968.5mm; according to the calculation mode of the first embodiment, the chord width of the arc section guide wall required by the test run of the B737-900 narrow body machine is 56246mm.
Taking an A319 narrow body machine as an example, the total machine length of the A319 narrow body machine I1 is 33721mm, the span length J1 is 33911mm, the output airflow diffusion angle K of the tail nozzle of the engine is + -35 DEG, and the length of the reserved safety distance M is 10141.5mm; according to the calculation mode of the first embodiment, the chord width of the arc-shaped section guide wall required by test run of the A319 narrow body machine is 54194mm.
Because the span length of the B737-700 narrow body machine is longer than that of the B737-600 narrow body machine, the B737-800 narrow body machine, the B737-900 narrow body machine and the A319 narrow body machine; the difference value between the chord width required by B737-600 narrow body machine, B737-800 narrow body machine, B737-900 narrow body machine and A319 test run and the chord width required by B737-700 narrow body machine test run is smaller than 5000mm; the chord widths required by the B737-700 narrow body machine, the AB737-600 narrow body machine, the B737-800 narrow body machine, the B737-900 narrow body machine and the A319 narrow body machine are relatively close, so that the U-shaped guide wall in the embodiment 3 is compatible with the B737-700 narrow body machine, the B737-600 narrow body machine, the B737-800 narrow body machine, the B737-900 narrow body machine and the A319 narrow body machine in size for test run.
As shown in fig. 4 and 5, the arc-shaped section guide wall comprises a wall body 1 and a bracket 2 for supporting the wall body 1; the length direction of the wall body 1 is formed by connecting more than two diversion noise reduction assemblies 3, the top view of the wall body 1 is in arc-shaped arrangement, the diversion noise reduction assemblies 3 are in the prior art, and the bracket 2 comprises an arc-shaped framework 21, upright posts 22 and a supporting assembly; the diversion noise reduction assembly is arranged on the arc-shaped framework. One end of the upright post 22 is connected with the arc-shaped framework 21; the upright post 22 and the arc-shaped framework 21 are obliquely arranged; the arc framework 21 is arranged to extend downwards and inwards along the height direction of the arc framework to form an arc shape, and the arc framework extends along the length direction of the upright post 22; the distance between the upright post 22 and the arc-shaped framework 21 is gradually increased; the support component is connected between the upright 22 and the arc-shaped framework 21; a fixing piece 211 is arranged at the bottom end of the arc-shaped framework 21; in use, the fixing member 211 and one end of the post 22 are fixed to the ground. The support assembly comprises a first support 231, a second support 232 and a third support 233; triangular structures are formed between the first support 231 and the second support 232, and between the second support 232 and the third support 233. The support is thus stable.
The arc-shaped framework is supported by the upright posts which are obliquely arranged; the support is stable; the arc-shaped framework can resist the impact of wake flow; the shaking caused by insufficient supporting force on the arc-shaped framework is avoided; and thus causes interference with resonance.
The air flow of the engine acts on the arc-shaped section guide wall, and a part of the air flow flows along the height direction of the arc-shaped section guide wall; the other part of the air flow flows along the length direction of the guide wall of the arc section.
Table 1 is a table of the correspondence between the dimensions of the narrow body machines of different models and the chord width of the guide wall of the arc section required for the corresponding test run. The units of length in Table 1 are all mm.
TABLE 1
As shown in fig. 6 and 7, for analyzing the airflow generated correspondingly by the present invention, as shown in fig. 6, the portion a in fig. 6 is the upper airflow portion of the arc-shaped flow guiding wall, and the airflow of the portion a is larger, because the high-speed airflow ejected by the engine flows through the steel plate flow guiding wall, the airflow is raised first and then flows backward to the rear due to the effect of diffusing and guiding the wind by the wall body, so that the wake vortex area at the rear part of the steel plate flow guiding wall is pressed and diffused backward, the low-speed area is stable, conditions are created for placing objects behind the flow guiding wall, and the rear flow field is natural wind, thereby having no influence on the rear parking of the aircraft, staff and vehicles.
As shown in FIG. 7, the wind speed distribution diagram of the windward side of the guide wall can be seen, for example, the part B is two side parts of the guide wall with arc-shaped sections, and as can be seen from the diagram, when the high-speed airflow hits the guide wall, the airflow uniformity is better, and the airflow is more uniformly diffused to the middle and two sides.
Claims (8)
1. A narrow organism ground is C type guide wall for test car which characterized in that: comprises an arc section guide wall;
determining chord width B1 of the arc-shaped section guide wall by the sum of the span length of the two wings of the narrow machine body and the safety distance reserved by the two wings extending outwards respectively;
determining the end position of the guide wall of the arc section through the chord width B1, wherein the engine of the narrow machine body generates the reflected air flow generated after the outermost air flow meets the arc section under the maximum diffusion angle and is arranged at the outer side of the wing of the corresponding narrow machine body;
the circle center corresponding to the arc-shaped section is arranged on a straight line extending from the tail port of the APU of the narrow machine body to the aircraft nose;
the engine of the narrow machine body generates the reflected air flow generated by the outmost air flow after encountering the arc-shaped section under the maximum diffusion angle, the reflected air flow is positioned at the inner side of the first safety line, and the first safety line is positioned at the straight line where the two ends of the guide wall of the arc-shaped section extend towards the aircraft nose along the length direction of the aircraft;
the arc length of the arc-shaped section guide wall is 51868-66996mm; the chord width of the arc section guide wall is 50080-64415mm, and the width of the narrow body machine body is less than 4.72m.
2. The C-shaped guide wall for a narrow body floor test vehicle of claim 1, wherein: the outer arc radius of the arc-shaped section guide wall is 133800mm, and the inner arc radius of the arc-shaped section guide wall is 130000mm.
3. The C-shaped guide wall for a narrow body floor test vehicle of claim 1, wherein: the arc width of the arc section guide wall is 3800mm.
4. The C-shaped guide wall for a narrow body floor test vehicle of claim 1, wherein: the arc length of the arc-shaped section guide wall is 66996mm, and the chord width of the arc-shaped section guide wall is 64415mm.
5. The C-shaped guide wall for a narrow body floor test vehicle of claim 1, wherein: the arc length of the arc-shaped section guide wall is 62674mm, and the chord width of the arc-shaped section guide wall is 60338mm.
6. The C-shaped guide wall for a narrow body floor test vehicle of claim 1, wherein: the arc length of the arc-shaped section guide wall is 58351mm, and the chord width of the arc-shaped section guide wall is 56246mm.
7. The C-shaped guide wall for wide body bottom surface test vehicles of claim 1, wherein: the shortest distance between the tail port of the APU of the wide machine body and the guide wall is 7500mm.
8. The C-shaped guide wall for wide body bottom surface test vehicles of claim 1, wherein: the arc guide wall comprises a wall body and a support used for supporting the wall body, the wall body is arranged in an arc shape along the length direction of the wall body, the support comprises an arc-shaped framework, the arc-shaped framework is arranged in an arc shape along the height direction of the wall body, the arc-shaped framework is arranged in an inward downward arc shape, and the engine of the wide engine body generates the emission air flow generated by the outmost air flow under the maximum diffusion angle, and the emission air flow formed by the outmost air flow of the engine of the wide engine body under the maximum diffusion angle along the length direction of the wall body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022106542465 | 2022-06-10 | ||
| CN202210654246 | 2022-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116834964A true CN116834964A (en) | 2023-10-03 |
Family
ID=88164405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310683526.3A Pending CN116834964A (en) | 2022-06-10 | 2023-06-09 | C-shaped guide wall for narrow-body ground test vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116834964A (en) |
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2023
- 2023-06-09 CN CN202310683526.3A patent/CN116834964A/en active Pending
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