CN220410896U - U-shaped guide wall for wide-organism ground test vehicle - Google Patents
U-shaped guide wall for wide-organism ground test vehicle Download PDFInfo
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Abstract
The utility model provides a U-shaped guide wall for a wide-organism ground test, which comprises an arc-shaped section guide wall and two straight-line section guide walls, wherein the two straight-line section guide walls are connected with the arc-shaped section guide wall, and the U-shaped guide wall is characterized in that: the arc length of the arc-shaped section guide wall is 61252-97483mm; the chord width of the guide wall of the arc section is 62550-94625mm; the length of the straight-line segment guide wall is 46440-58320mm; the utility model can fully cover the air flow generated by the aircraft engine with the diffusion angle of +/-35 degrees.
Description
Technical Field
The utility model relates to the field of aviation equipment, in particular to a U-shaped guide wall for a wide-organism 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 prior civil aircraft comprises two types of wide aircraft bodies and narrow aircraft bodies, wherein the narrow aircraft bodies are 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 aircraft bodies are 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 bodies have different application scenes due to different width parameters of the two types of aircraft bodies, for example, the wide aircraft bodies are more biased to be loaded with containerized goods, and the flow direction of air flow sprayed out from the tail part of the aircraft is changed by using a guide wall in general; the original guide wall is linearly arranged, and the diffusion angle of the airflow output by the tail nozzle of the aircraft engine is +/-35 degrees.
Referring to fig. 1, after the incident airflow is reflected in the guide wall, the reflected airflow flows to the side of the aircraft along the direction away from the aircraft; 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, the length of the arc-shaped guide wall is not limited in the prior art, and then after the air flow output by the generator 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 utility model provides a U-shaped guide wall for a wide-organism ground test vehicle, which can fully cover air flow generated by an engine at the outermost side of an airplane with a diffusion angle of +/-35 degrees and ensure that personnel in an area outside a straight-line section guide wall cannot be impacted by the air flow.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: the U-shaped guide wall for the wide-organism-area test comprises an arc-shaped section guide wall and two straight-line section guide walls, wherein the two straight-line section guide walls are connected with the arc-shaped section guide wall, the arc-shaped section guide wall comprises a wall body and a bracket for supporting the wall body, and the wall body is arranged in an arc shape along the length direction of the wall body; the straight-line segment flow guide wall is in arc connection with the arc segment flow guide wall, and the arc length of the arc segment flow guide wall is 61252-97483mm; the chord width of the guide wall of the arc section is 62550-94625mm; the length of the straight-line segment guide wall is 46440-58320mm, and the width of the machine body of the wide machine body is not less than 4.72m.
By setting specific parameters of the arc length and chord width, the chord width is more than 12 times of the body of the wide machine, and the arc length is more than 12.5 times, so that the arc length is not relatively shorter than that of a pure arc section, the whole arc length and chord width is not too large, the occupied area is large, the length of the guide wall of the arc section can cover reflected air flow with the diffusion angle of +/-35 degrees, and the reflected air flow approaches to an airplane; furthermore, the air flow impact to workers or buildings in a safety area is avoided, the safety of test run is guaranteed when test run is conducted, meanwhile, the straight line section guide wall is arranged, so that the side surface of the air flow can be blocked through the straight line section guide wall, the arc section guide wall is not required to be large, the occupied area is small, the arc section guide wall and the straight line section guide wall are connected through an arc, and air flow accumulation is prevented from being caused at the joint of the arc section guide wall and the straight line section guide wall.
Further, the outer arc radius of the guide wall of the arc section is 126000-126006mm; the radius of the inner arc of the arc-shaped section guide wall is 122050mm.
By the arrangement, the arc length is determined through the outer arc radius and the inner arc radius, so that the wide machine body can meet the arc length setting requirement.
Further, the arc width of the arc section guide wall is 3950mm.
The arc width is determined through the outer arc radius and the inner arc radius, and the wide machine body can meet the arc length setting requirement.
Further, the outer arc chamfer angle between the arc section guide wall and the straight line section guide wall is 5985mm; the inner arc chamfer angle between the arc section guide wall and the straight line section guide wall is 2032mm.
Further, the arc length of the arc-shaped section guide wall is 80492mm, the chord width of the arc-shaped section guide wall is 79955mm, the length of the straight-line section guide wall is 58320mm, and the outer arc radius of the arc-shaped section guide wall is 126000mm.
The arc length and chord width can meet the safety requirement of the B474-width machine body.
Further, the arc length of the arc-shaped section guide wall is 61252mm, the chord width of the arc-shaped section guide wall is 62550mm, the length of the straight-line section guide wall is 46440mm, and the outer arc radius of the arc-shaped section guide wall is 126006mm.
The arc length and chord width can meet the safety requirement of the body with the width of B767-200.
Further, the arc length of the arc-shaped section guide wall is 97483mm, the chord width of the arc-shaped section guide wall is 94625mm, the length of the straight-line section guide wall is 58320mm, and the outer arc radius of the arc-shaped section guide wall is 12600mm.
The arc length and chord width can meet the safety requirement of an A380 wide machine body.
Further, the arc-shaped section guide wall comprises a wall body and a bracket for supporting the wall body; the length direction of the wall body is formed by connecting more than two diversion noise reduction components.
The bracket comprises an arc-shaped framework, upright posts and a supporting component; the diversion noise reduction assembly is arranged on the arc-shaped framework, and one end of the upright post is connected with the arc-shaped framework; the upright posts and the arc-shaped framework are obliquely arranged; along the length direction of the upright post; the distance between the upright post and the arc framework is gradually increased; the support component is connected between the upright post and the arc-shaped framework.
The arc framework is supported by the upright posts which are obliquely arranged; the support is stable; the arc-shaped framework can resist the impact of air flow; the shaking caused by insufficient supporting force on the arc-shaped framework is avoided; and thus causes interference with resonance.
Further, a fixing piece is arranged at the bottom end of the arc-shaped framework.
The device is fixed on the arc-shaped framework on the ground through the fixing piece and the upright post.
Further, the support assembly comprises a first support piece, a second support piece and a third support piece; triangular structures are formed between the first support piece and the second support piece and between the second support piece and the third support piece. The support is thus stable.
Drawings
FIG. 1 is a schematic view of the reflection of aircraft engine airflow in a linear guide wall.
Fig. 2 is a schematic diagram of a B747 wide machine body for test run in the first embodiment.
FIG. 3 is a schematic reflection of aircraft engine airflow in the present application.
FIG. 4 is a schematic view of an arc segment guide wall according to the present utility model.
Fig. 5 is a schematic structural view of a diversion noise reduction assembly and a bracket of an arc-shaped diversion wall according to the present utility model.
FIG. 6 is a left view airflow analysis model diagram of the arc-shaped section guide wall of the utility model.
FIG. 7 is a front view of the flow guide wall of the arc segment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 2-7; the U-shaped guide wall for the wide-organism-area test comprises an arc-shaped section guide wall 1a and two straight-line section guide walls 2a, wherein the two straight-line section guide walls 2a are connected with the arc-shaped section guide wall 1a, and one end of each straight-line section guide wall 2a is connected with one end of each arc-shaped section guide wall 1 a. The width of the wide machine body is not less than 4.72m.
Example 1
The arc length A1 of the arc-shaped section guide wall is 80492mm, the length B1 of the straight-line section guide wall is 58320mm, the chord width C1 of the arc-shaped section guide wall is 79955mm, the outer arc radius D1 of the arc-shaped section guide wall is 126000mm, the inner arc radius E of the arc-shaped section guide wall is 122050mm, the arc width F of the arc-shaped section guide wall is 3950mm, the outer arc chamfer G between the arc-shaped section guide wall and the straight-line section guide wall is 5985mm, and the inner arc chamfer H between the arc-shaped section guide wall and the straight-line section guide wall is 2032mm.
In this embodiment, the chord width C1 of the arc-shaped section guide wall is determined by the sum of the span length of the wide body and the distances between the two wings and the straight-line section guide wall on the adjacent side.
Determining the end position of an arc-shaped section guide wall through chord width C1, wherein the reflected airflow generated by the engine of the wide engine body under the maximum diffusion angle after encountering the arc-shaped section guide wall is arranged at the outer side of the wing of the corresponding wide engine body; specifically, the air flow X1 generated by the engine of the wide body is provided with a normal Z2 perpendicular to the end of the arc-shaped section guide wall at the intersection point of the arc-shaped section guide wall 1a, and the reflected air flow X2 of the air flow generated by the engine of the aircraft is determined by the normal Z2.
The engine with the wide engine body generates air flow which is in contact with the end part of the arc-shaped section guide wall 1a under the maximum diffusion angle, and reflected air flow generated after the air flow encounters the arc-shaped section guide wall is positioned at the inner side of the straight-line section guide wall 2 a; the outer side of the straight-line segment guide wall 2a is a safety area; the reflected air flow X2 of the air flow generated by the engine of the aircraft is located inside the straight guide wall 2 a.
The intersection point of the extended line of the tail port of the APU passing through the airplane and the arc-shaped section guide wall 1a is provided with a second auxiliary line Z1, and the second auxiliary line Z1 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 Z1 and the reflected air flow X2, and the angle alpha is more than or equal to 90 degrees and less than 180 degrees. The arc length is obtained through 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.
The position of the aircraft in the U-shaped guide wall is determined through the distance L between the tail port of the APU of the aircraft and the arc-shaped section guide wall, the position of the engine farthest from the arc-shaped section guide wall in the U-shaped guide wall is determined through the length of the aircraft, the position of the beginning end of the straight-line section guide wall is determined through the distance P between the engine farthest from the arc-shaped section guide wall and the beginning end of the straight-line section guide wall, and the length B1 of the straight-line section guide wall is determined through the distance between the beginning end of the straight-line section guide wall and the end of the arc-shaped section guide wall.
The chord width C1 of the arc-shaped section guide wall is determined according to the length of the span length and the distance between the wing and the straight-line section guide wall, so that the wide machine body can be parked in the U-shaped guide wall; the U-shaped guide wall is suitable for test run of the aircraft through the chord width C1, the arc length A1 and the length B1 of the straight-line guide wall. Meanwhile, the U-shaped flow guide wall is arranged, the arc-shaped section flow guide wall is positioned at the rear of the aircraft engine, and the straight-line section flow guide wall is positioned at two sides of the aircraft engine; the arc-shaped section guide wall blocks air flow along the length direction of the aircraft; the straight-line section guide wall blocks the air flow along the wide length direction of the airplane, so that the length of the U-shaped guide wall can cover the air flow with the diffusion angle of +/-35 degrees; the emitted air flow and the reflected air flow after the action of the guide wall can not impact staff and buildings at the two sides and the rear of the U-shaped guide wall; the safety of taking a trial run is ensured when taking a trial run.
The embodiment is compatible with wide machine bodies with the models of A330, A340-300, A350-900, B747, B777, B787-8 and B787-9 for test run.
The U-shaped guide wall is arranged in size; the outer arc radius D1 of the preset arc-shaped section guide wall is 126000mm, the inner arc radius E of the arc-shaped section guide wall is 122050mm, the arc width F of the arc-shaped section guide wall is 3950mm, the outer arc chamfer G between the arc-shaped section guide wall and the straight-line section guide wall is 5985m, and the inner arc chamfer H between the arc-shaped section guide wall and the straight-line section guide wall is 2032mm.
Taking a model B747 wide machine body as an example, the total machine length I1 of the B747 wide machine body is 70700mm, the span length J1 is 64955mm, and the output airflow diffusion angle K of the tail nozzle of the engine is +/-35 degrees; according to the standard, when the B747 wide machine body is subjected to ground test, the distance L between the tail mouth of the APU of the B747 wide machine body and the arc-shaped section guide wall is 15000mm, and the distance M between the wing and the straight-line section guide wall on the adjacent side is 7500mm; thus, the distance O between the stopping line of the nose wheel of the B747 wide machine body and the guide wall of the arc section is 77949mm.
Setting the chord width of an arc section guide wall and the length of a straight section guide wall in the U-shaped guide wall according to the size of the B747 wide machine body; the chord width C1 of the arc-shaped section guide wall required by B747 wide body test can be 79955mm by adding the distance 7500mm between one wing and the straight-line section guide wall on the adjacent side, the distance 7500mm between the other wing and the straight-line section guide wall on the adjacent side and the length 64955mm of the span length.
The aircraft engine is positioned between the initial end of the straight-line segment guide wall and the tail end of the straight-line segment guide wall, and the distance P between the initial end of the preset straight-line segment guide wall and the aircraft engine is 4000-5000mm; in this embodiment, one end of the straight-line segment guide wall far away from the arc segment guide wall is the start end of the straight-line segment guide wall; calibrating the initial end position of the straight line segment guide wall, and obtaining the length B1 of the straight line segment guide wall required by B747 wide body test run to be 58320mm through the length between the initial end of the straight line segment guide wall and the end of the arc segment guide wall.
The arc-shaped section guide wall 1a 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 frame 21 is provided to extend downward and inward along the height direction of the arc frame to form an arc.
Along the length of the column 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 air 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.
Taking an A330 wide machine body as an example, the total machine length of the A330 wide machine body is 63688mm, the span length is 60304mm, and the diffusion angle of the output airflow of the tail nozzle of the engine is +/-35 degrees; according to the standard, when the A330 wide machine body is subjected to ground test, the distance between the tail opening of the APU of the A330 wide machine body and the guide wall of the arc section is 15000mm, and the distance between the wing and the guide wall of the straight line section on the adjacent side is 7500mm; thereby obtaining the distance between the stopping line of the nose wheel of the A330 wide machine body and the guide wall of the arc section of 71595mm.
Setting the chord width of an arc section guide wall and the length of a straight line section guide wall in the U-shaped guide wall according to the size of the A330 wide machine body; the chord width of the arc-shaped section guide wall required by the test of the A330 wide machine body can be obtained by adding the distance 7500mm between one wing and the straight-line section guide wall on the adjacent side, the distance 7500mm between the other wing and the straight-line section guide wall on the adjacent side and the length 60304mm of the span length.
The aircraft engine is positioned between the initial end of the straight-line segment guide wall and the tail end of the straight-line segment guide wall, and the distance between the initial end of the preset straight-line segment guide wall and the aircraft engine is 4000-5000mm; in this embodiment, one end of the straight-line segment guide wall far away from the arc segment guide wall is the start end of the straight-line segment guide wall; calibrating the initial end position of the straight line segment guide wall, and obtaining the length of the straight line segment guide wall which is required by the test run of the A330 wide machine body as 52920mm through the length between the initial end of the straight line segment guide wall and the end of the arc segment guide wall.
Taking an A340-300 wide machine body as an example, the total machine length of the A340-300 wide machine body is 64205mm, the span length is 60334mm, and the diffusion angle of the air flow output by the tail nozzle of the engine is +/-35 degrees; according to the standard, when the A340-300 wide machine body is subjected to ground test, the distance between the tail opening of the APU of the A340-300 wide machine body and the guide wall of the arc section is 15000mm, and the distance between the wing and the guide wall of the straight line section on the adjacent side is 7500mm; thus, the distance between the stopping line of the nose wheel of the machine body with the width A340-300 and the guide wall of the arc section is 72534mm.
Setting the chord width of an arc section guide wall and the length of a straight section guide wall in the U-shaped guide wall according to the size of the A340-300 wide machine body; the chord width of the arc-shaped section guide wall required by the test of the A340-300 wide machine body can be obtained by adding the distance 7500mm between one wing and the straight-line section guide wall on the adjacent side, the distance 7500mm between the other wing and the straight-line section guide wall on the adjacent side and the length 60334mm of the span length.
The aircraft engine is positioned between the initial end of the straight-line segment guide wall and the tail end of the straight-line segment guide wall, and the distance between the initial end of the preset straight-line segment guide wall and the aircraft engine is 4000-5000mm; in this embodiment, one end of the straight-line segment guide wall far away from the arc segment guide wall is the start end of the straight-line segment guide wall; calibrating the initial end position of the straight line segment guide wall, and obtaining the length of the straight line segment guide wall required by the test of the machine body with the width A340-300 to be 54000mm according to the length between the initial end of the straight line segment guide wall and the end of the arc segment guide wall.
Taking an A350 wide machine body as an example, the total machine length of the A350 wide machine body is 66261mm, the span length is 64750mm, and the diffusion angle of the air flow output by the tail nozzle of the engine is +/-35 degrees; according to the standard, when the A350 wide machine body is used for ground test, the distance between the tail opening of the APU of the A350 wide machine body and the guide wall of the arc section is 15000mm, and the distance between the wing and the guide wall of the straight line section on the adjacent side is 7500mm; thus, the distance between the stopping line of the nose wheel of the A350 wide machine body and the guide wall of the arc section is 73880mm.
Setting the chord width of an arc section guide wall and the length of a straight line section guide wall in the U-shaped guide wall according to the size of the A350 wide machine body; the chord width of the arc-shaped section guide wall required by the test of the A350 wide machine body can be obtained by adding the distance 7500mm between one wing and the straight-line section guide wall on the adjacent side, the distance 7500mm between the other wing and the straight-line section guide wall on the adjacent side and the length 64750mm of the span length.
The aircraft engine is positioned between the initial end of the straight-line segment guide wall and the tail end of the straight-line segment guide wall, and the distance between the initial end of the preset straight-line segment guide wall and the aircraft engine is 4000-5000mm; in this embodiment, one end of the straight-line segment guide wall far away from the arc segment guide wall is the start end of the straight-line segment guide wall; calibrating the initial end position of the straight-line segment guide wall, and obtaining the length of the straight-line segment guide wall required by the test of the machine body with the width A350 as 54000mm according to the length between the initial end of the straight-line segment guide wall and the end of the arc segment guide wall.
Taking an A350-900 wide machine body as an example, the total machine length of the A350-900 wide machine body is 65240mm, the span length is 64750mm, and the diffusion angle of the output airflow of the tail nozzle of the engine is +/-35 degrees; according to the standard, when the A350-900 wide machine body is used for ground test, the distance between the tail opening of the A350-900 wide machine body and the guide wall of the arc section is 15000mm, and the distance between the wing and the guide wall of the straight line section on the adjacent side is 7500mm; thus, the distance between the stopping line of the nose wheel of the machine body with the width A350-900 and the guide wall of the arc section is 75632mm.
Setting the chord width of an arc section guide wall and the length of a straight section guide wall in the U-shaped guide wall according to the size of the machine body with the width of A350-900; the chord width of the arc-shaped section guide wall required by the test of the A350-900 wide machine body can be 79750 by adding the distance 7500mm between one wing and the straight-line section guide wall on the adjacent side, the distance 7500mm between the other wing and the straight-line section guide wall on the adjacent side and the length 64750mm of the span length.
The aircraft engine is positioned between the initial end of the straight-line segment guide wall and the tail end of the straight-line segment guide wall, and the distance between the initial end of the preset straight-line segment guide wall and the aircraft engine is 4000-5000mm; in this embodiment, one end of the straight-line segment guide wall far away from the arc segment guide wall is the start end of the straight-line segment guide wall; calibrating the initial end position of the straight line segment guide wall, and obtaining the length of the straight line segment guide wall required by test of the machine body with the width A350-900 to 55080mm according to the length between the initial end of the straight line segment guide wall and the end of the arc segment guide wall.
Taking a B777 wide machine body as an example, the total machine length of the B777 wide machine body is 73028mm, the span length is 64800mm, and the diffusion angle of the output airflow of the tail nozzle of the engine is +/-35 degrees; according to the standard, when the B777 wide machine body is subjected to ground test, the distance between the tail opening of the APU of the B777 wide machine body and the guide wall of the arc section is 15000mm, and the distance between the wing and the guide wall of the straight line section on the adjacent side is 7500mm; thereby obtaining the distance between the stopping line of the nose wheel of the B777 wide machine body and the guide wall of the arc section of 82135mm.
Setting the chord width of an arc section guide wall and the length of a straight section guide wall in the U-shaped guide wall according to the size of the B777 wide machine body; the chord width of the arc-shaped section guide wall required by B777 wide body test can be obtained by adding the distance 7500mm between one wing and the straight-line section guide wall on the adjacent side, the distance 7500mm between the other wing and the straight-line section guide wall on the adjacent side and the length 64800mm of the span length to 79800mm.
The aircraft engine is positioned between the initial end of the straight-line segment guide wall and the tail end of the straight-line segment guide wall, and the distance between the initial end of the preset straight-line segment guide wall and the aircraft engine is 4000-5000mm; in this embodiment, one end of the straight-line segment guide wall far away from the arc segment guide wall is the start end of the straight-line segment guide wall; calibrating the initial end position of the straight line segment guide wall, and obtaining the length of the straight line segment guide wall required by B777 wide body test run as 58320mm through the length between the initial end of the straight line segment guide wall and the end of the arc segment guide wall.
Taking the B787 wide machine body as an example, the total machine length of the B787 wide machine body is 55916mm, the span length is 59997mm, and the diffusion angle of the output airflow of the tail nozzle of the engine is +/-35 degrees; according to the standard, when the B787 wide machine body is used for ground test, the distance between the tail opening of the APU of the B787 wide machine body and the guide wall of the arc section is 15000mm, and the distance between the wing and the guide wall of the straight line section on the adjacent side is 7500mm; thus, the distance between the stopping line of the nose wheel of the B787 wide machine body and the guide wall of the arc section is 65513mm.
Setting the chord width of an arc section guide wall and the length of a straight section guide wall in the U-shaped guide wall according to the size of the B787 wide machine body; the chord width of the arc-shaped section guide wall required by B787 wide body test can be 75127mm by adding the distance 7500mm between the wing and the straight-line section guide wall on the adjacent side, the distance 7500mm between the other wing and the straight-line section guide wall on the adjacent side and the length 59997mm of the span length.
The aircraft engine is positioned between the initial end of the straight-line segment guide wall and the tail end of the straight-line segment guide wall, and the distance between the initial end of the preset straight-line segment guide wall and the aircraft engine is 4000-5000mm; in this embodiment, one end of the straight-line segment guide wall far away from the arc segment guide wall is the start end of the straight-line segment guide wall; calibrating the initial end position of the straight line segment guide wall, and obtaining the length of the straight line segment guide wall required by B787 wide body test run as 50760mm through the length between the initial end of the straight line segment guide wall and the end of the arc segment guide wall.
Taking a B787-8 wide machine body as an example, the total machine length of the B787-8 wide machine body is 55910mm, the span length is 60120mm, and the diffusion angle of the output airflow of the tail nozzle of the engine is +/-35 degrees; according to the standard, when the B787-8 wide machine body is used for ground test, the distance between the tail opening of the APU of the B787-8 wide machine body and the guide wall of the arc section is 15000mm, and the distance between the wing and the guide wall of the straight line section on the adjacent side is 7500mm; thereby the distance between the stopping line of the nose wheel of the B787-8 wide machine body and the guide wall of the arc section is 65500mm.
Setting the chord width of an arc section guide wall and the length of a straight section guide wall in the U-shaped guide wall according to the size of the B787-8 wide machine body; the chord width of the arc-shaped section guide wall required by B787-8 wide body test can be 75120mm by adding the distance 7500mm between one wing and the straight-line section guide wall on the adjacent side, the distance 7500mm between the other wing and the straight-line section guide wall on the adjacent side and the length 60120mm of the span length.
The aircraft engine is positioned between the initial end of the straight-line segment guide wall and the tail end of the straight-line segment guide wall, and the distance between the initial end of the preset straight-line segment guide wall and the aircraft engine is 4000-5000mm; in this embodiment, one end of the straight-line segment guide wall far away from the arc segment guide wall is the start end of the straight-line segment guide wall; calibrating the initial end position of the straight line segment guide wall, and obtaining the length of the straight line segment guide wall required by B787-8 wide body test run as 49680mm through the length between the initial end of the straight line segment guide wall and the end of the arc segment guide wall.
Taking the B787-9 wide machine body as an example, the total machine length of the B787-9 wide machine body is 62000mm, the span length is 62080mm, and the diffusion angle of the output airflow of the tail nozzle of the engine is +/-35 degrees; according to the standard, when the B787-9 wide machine body is used for ground test, the distance between the tail opening of the APU of the B787-9 wide machine body and the guide wall of the arc section is 15000mm, and the distance between the wing and the guide wall of the straight line section on the adjacent side is 7500mm; thus, the distance between the stopping line of the nose wheel of the body with the width of B787-9 and the guide wall of the arc section is 71590mm.
Setting the chord width of an arc section guide wall and the length of a straight section guide wall in the U-shaped guide wall according to the size of the B787-9 wide machine body; the chord width of the arc-shaped section guide wall required by B787-9 wide body test can be 77085mm by adding the distance 7500mm between one wing and the straight-line section guide wall on the adjacent side, the distance 7500mm between the other wing and the straight-line section guide wall on the adjacent side and the length 62080mm of the span length.
The aircraft engine is positioned between the initial end of the straight-line segment guide wall and the tail end of the straight-line segment guide wall, and the distance between the initial end of the preset straight-line segment guide wall and the aircraft engine is 4000-5000mm; in this embodiment, one end of the straight-line segment guide wall far away from the arc segment guide wall is the start end of the straight-line segment guide wall; calibrating the initial end position of the straight line segment guide wall, and obtaining the length of the straight line segment guide wall required by B787-9 wide body test run as 52920mm through the length between the initial end of the straight line segment guide wall and the end of the arc segment guide wall.
Because the wingspan length of the B747 wide machine body is longer than that of the A330 wide machine body, the A340-300 wide machine body, the A350-900, the B777 wide machine body, the B787-8 wide machine body and the B787-9 wide machine body; the difference value between the chord width required by the test run of the A330 wide machine body, the A340-300 wide machine body, the A350-900, the B777 wide machine body, the B787-8 wide machine body and the B787-9 wide machine body and the chord width required by the test run of the B747 wide machine body is smaller than 5000mm; the chord widths required by the test of the A330 wide machine body, the A340-300 wide machine body, the A350-900 wide machine body, the B777 wide machine body, the B787-8 wide machine body, the B787-9 and the B747 wide machine body are relatively close, so that the U-shaped flow guide wall in the first embodiment is compatible with the B747 wide machine body, the A330 wide machine body, the A340-300 wide machine body, the A350-900 wide machine body, the B777 wide machine body, the B787-8 wide machine body and the B787-9 wide machine body.
Example two
The arc length of the arc-shaped section guide wall 1a is 61252mm, the length of the straight-line section guide wall 2a is 46440mm, the chord width of the arc-shaped section guide wall is 62550mm, the outer arc radius of the arc-shaped section guide wall is 126006mm, the inner arc radius of the arc-shaped section guide wall is 122050mm, the arc width of the arc-shaped section guide wall is 3950mm, the outer arc chamfer between the arc-shaped section guide wall and the straight-line section guide wall is 5985mm, and the inner arc chamfer between the arc-shaped section guide wall and the straight-line section guide wall is 2032mm.
In this embodiment, the determination method of the chord width C1, the arc length A1 and the length B1 of the straight-line guide wall is the same as that of the first embodiment. The structure of the arc-shaped section guide wall is the same as that of the first embodiment.
The embodiment is compatible with wide machine bodies with the models of A300, A310, B767-200 and B767-300 for test run.
The U-shaped guide wall is arranged in size; the outer arc radius of the preset arc-shaped section guide wall is 126006mm, the inner arc radius of the arc-shaped section guide wall is 122050mm, the arc width of the arc-shaped section guide wall is 3950mm, the outer arc chamfer between the arc-shaped section guide wall and the straight-line section guide wall is 5985m, and the inner arc chamfer between the arc-shaped section guide wall and the straight-line section guide wall is 2032mm.
Taking a wide engine body of B767-200 as an example, the total engine length of B767-200 is 47240mm, the span length is 47549mm, and the diffusion angle of the output airflow of the tail nozzle of the engine is +/-35 degrees; referring to the calculation mode of the first embodiment, the chord width of the arc-shaped section guide wall required by B767-200 wide machine body test is 62550mm, and the length of the straight-line section guide wall required by B767-200 wide machine body test is 46440mm.
Taking an A300 wide machine body as an example, the total machine length of the A300 wide machine body is 54080mm, the span length is 44840mm, and the diffusion angle of the output airflow of the tail nozzle of the engine is +/-35 degrees; referring to the calculation mode of the first embodiment, the chord width of the arc-shaped section guide wall required by the test of the A300 wide machine body is 5980 mm, and the length of the straight-line section guide wall required by the test of the A300 wide machine body is 51480mm.
Taking an A310 wide machine body as an example, the total machine length of the A310 wide machine body is 46665mm, the span length is 43900mm, and the diffusion angle of the air flow output by the tail nozzle of the engine is +/-35 degrees; referring to the calculation mode of the first embodiment, the chord width of the arc-shaped section guide wall required by the test of the A310 wide machine body is 58900mm, and the length of the straight-line section guide wall required by the test of the A300 wide machine body is 48600mm.
Taking a B767-300 wide machine body as an example, the total machine length of the B767-300 wide machine body is 54940mm, the span length is 47039mm, and the diffusion angle of the output airflow of the tail nozzle of the engine is +/-35 degrees; referring to the calculation mode of the first embodiment, the chord width of the arc-shaped section guide wall required by B767-300 wide machine body test is 62039mm, and the length of the straight-line section guide wall required by B767-300 wide machine body test is 49680mm.
Because the wingspan length of the B767-200 wide machine body is longer than that of the A300 wide machine body, the A310 wide machine body and the B767-300 wide machine body; the difference value between the chord width required by the test run of the machine body with the width A300, the machine body with the width A310 and the machine body with the width B767-300 and the chord width required by the test run of the machine body with the width B767-200 is less than 5000mm; the chord widths required by the test run of the A300 wide machine body, the A310 wide machine body, the B767-300 wide machine body and the B767-200 wide machine body are relatively close, so that the U-shaped flow guide wall in the second embodiment is compatible with the B767-200 wide machine body, the A300 wide machine body, the A310 wide machine body and the B767-300 wide machine body in size.
Example III
The arc length of the arc-shaped section guide wall is 97483mm, the length of the straight-line section guide wall is 58320mm, the chord width of the arc-shaped section guide wall is 94625mm, the outer arc radius of the arc-shaped section guide wall is 126000mm, the inner arc radius of the arc-shaped section guide wall is 122050mm, the arc width of the arc-shaped section guide wall is 3950mm, the outer arc chamfer between the arc-shaped section guide wall and the straight-line section guide wall is 5985m, and the inner arc chamfer between the arc-shaped section guide wall and the straight-line section guide wall is 2032mm.
In this embodiment, the determination method of the chord width C1, the arc length A1 and the length B1 of the straight-line guide wall is the same as that of the first embodiment. The structure of the arc-shaped section guide wall is the same as that of the first embodiment.
This embodiment is compatible with a wide machine body of model a380 for testing.
The U-shaped guide wall is arranged in size; the outer arc radius of the preset arc-shaped section guide wall is 126000mm, the inner arc radius of the arc-shaped section guide wall is 122050mm, the arc width of the arc-shaped section guide wall is 3950mm, the outer arc chamfer between the arc-shaped section guide wall and the straight-line section guide wall is 5985m, and the inner arc chamfer between the arc-shaped section guide wall and the straight-line section guide wall is 2032mm.
Taking an A380 wide machine body as an example, the total machine length of the A380 wide machine body is 72727mm, the span length is 79625mm, and the diffusion angle of the air flow output by the tail nozzle of the engine is +/-35 degrees; referring to the calculation mode of the first embodiment, the chord width of the arc-shaped section guide wall required by the test of the A380 wide machine body is 94625mm, and the length of the straight-line section guide wall required by the test of the A380 wide machine body is 58350mm.
Table 1 is a table of the corresponding relation between the sizes of the machine bodies with different machine types, the chord width of the arc-shaped section guide wall required by the test run and the length of the straight-line section guide wall. 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 utility model, as shown in fig. 7, 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, the condition is 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 (9)
1. The utility model provides a wide organism is U type guide wall for floor test, includes arc section guide wall and two straightway guide wall, and two straightway guide wall all are connected with arc section guide wall, its characterized in that: the arc section guide wall comprises a wall body and a bracket for supporting the wall body, and the wall body is arranged in an arc shape along the length direction of the wall body; the straight-line segment flow guide wall is in arc connection with the arc segment flow guide wall, and the arc length of the arc segment flow guide wall is 61252-97483mm; the chord width of the guide wall of the arc section is 62550-94625mm; the length of the straight-line segment guide wall is 46440-58320mm; the body width of the wide body is not less than 4.72 and m m.
2. The U-shaped guide wall for a wide body floor test vehicle of claim 1, wherein: the radius of the outer arc of the guide wall of the arc section is 126000-126006mm; the radius of the inner arc of the arc-shaped section guide wall is 122050mm.
3. The U-shaped guide wall for a wide body floor test vehicle of claim 2, wherein: the arc width of the arc section guide wall is 3950mm.
4. A U-shaped guide wall for a wide body floor test vehicle according to claim 3, wherein: the arc length of the arc-shaped section guide wall is 80492mm, the chord width of the arc-shaped section guide wall is 79955mm, the length of the straight-line section guide wall is 58320mm, and the outer arc radius of the arc-shaped section guide wall is 126000mm.
5. A U-shaped guide wall for a wide body floor test vehicle according to claim 3, wherein: the arc length of the arc-shaped section guide wall is 61252mm, the chord width of the arc-shaped section guide wall is 62550mm, the length of the straight-line section guide wall is 46440mm, and the outer arc radius of the arc-shaped section guide wall is 126006mm.
6. A U-shaped guide wall for a wide body floor test vehicle according to claim 3, wherein: the arc length of the arc-shaped section guide wall is 97483mm, the chord width of the arc-shaped section guide wall is 94625mm, the length of the straight-line section guide wall is 58320mm, and the outer arc radius of the arc-shaped section guide wall is 12600mm.
7. The U-shaped guide wall for a wide body floor test vehicle of claim 1, wherein: the length direction of the wall body is formed by connecting more than two diversion noise reduction components;
the bracket comprises an arc-shaped framework, upright posts and a supporting component; the diversion noise reduction assembly is arranged on the arc-shaped framework, and one end of the upright post is connected with the arc-shaped framework; the upright posts and the arc-shaped framework are obliquely arranged; along the length direction of the upright post; the distance between the upright post and the arc framework is gradually increased; the support component is connected between the upright post and the arc-shaped framework.
8. The U-shaped guide wall for a wide body floor test vehicle of claim 7, wherein: the bottom of the arc framework is provided with a fixing piece.
9. The U-shaped guide wall for a wide body floor test vehicle of claim 7, wherein: the support assembly comprises a first support piece, a second support piece and a third support piece; triangular structures are formed between the first support piece and the second support piece and between the second support piece and the third support piece.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022214443081 | 2022-06-10 | ||
| CN202221444308 | 2022-06-10 |
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| CN220410896U true CN220410896U (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321470005.1U Active CN220410896U (en) | 2022-06-10 | 2023-06-09 | U-shaped guide wall for wide-organism ground test vehicle |
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- 2023-06-09 CN CN202321470005.1U patent/CN220410896U/en active Active
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