CN113899524B - Gust flow field calibration device - Google Patents
Gust flow field calibration device Download PDFInfo
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- CN113899524B CN113899524B CN202111160871.6A CN202111160871A CN113899524B CN 113899524 B CN113899524 B CN 113899524B CN 202111160871 A CN202111160871 A CN 202111160871A CN 113899524 B CN113899524 B CN 113899524B
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- wind tunnel
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- 239000000523 sample Substances 0.000 claims abstract description 17
- 238000012360 testing method Methods 0.000 claims description 16
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 230000006378 damage Effects 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a gust flow field calibrating and measuring device which comprises a calibrating and measuring rake, an upper mounting seat, a lower mounting seat, a plurality of groups of front rectifying wing sections and a rear rectifying wing section, wherein the upper mounting seat and the lower mounting seat are respectively fixedly connected with the upper end and the lower end of the rear rectifying wing section, a linear guide rail is arranged at the front edge of the rear rectifying wing section, a plurality of front rectifying wing sections are respectively arranged on the linear guide rail, one end of the calibrating and measuring rake is fixedly connected with the front rectifying wing section at the middle position, the other end of the calibrating and measuring rake is respectively connected with a plurality of calibrating and measuring probes through a plurality of supporting rods, and the upper mounting seat and the lower mounting seat are respectively fixedly pressed with the upper wall surface and the lower wall surface of a wind tunnel through pressing pieces. The automatic moving device effectively solves the defects that the existing automatic moving device is high in manufacturing cost, more in installation equipment in a wind tunnel and larger in influence on the quality of a convection field, and simultaneously solves the problems of damage to the wind tunnel and the like due to the fact that holes are formed in the wall plate of the wind tunnel. Has the advantages of strong practicability, ingenious structure and simple and convenient disassembly and assembly.
Description
Technical Field
The invention relates to a gust flow field calibration device.
Background
Gusts, also known as gusts (gusts) or atmospheric turbulence, are a strong deterministic wind disturbance in the atmosphere. When the aircraft encounters gusts, the airframe may generate additional unsteady aerodynamic forces and moments that adversely affect the aircraft's flight performance. Modern civil aircraft, such as large airliners, emphasize economy, comfort, safety, reliability, require high aerodynamic efficiency and low structural weight, typically employ high aspect ratio wings, use composite materials in large quantities on structural materials, and have great flexibility, so that the aircraft is more responsive to gusts, gusts loads, particularly vertical discrete gusts, often become the most severe condition of flight loads, and have serious impact on the comfort, safety, economy, reliability of large airliners. When the aircraft encounters a medium-low strength gust, the unsteady pneumatic load can cause jolt of the aircraft, bring tension to passengers, reduce the comfort of civil aircraft, and even cause personal injury to the passengers; when the aircraft encounters high-strength unsteady aerodynamic load, the local overload of the aircraft can reach more than 2.5g, which can damage the aircraft structure or generate fatigue cracks, influence the service life of the aircraft, bring great influence to the safety and reliability of the aircraft, the civil aircraft is extremely sensitive to fatigue damage caused by gust load, and the gust load spectrum is an important scientific basis for the design of the reliability of the aircraft structure life. Due to the gust load problem, in order to ensure the strength of the aircraft, the aircraft structure needs to be reinforced, which leads to an increase in the weight of the aircraft and further affects the economy of the aircraft.
Accurately predicting wind gust loads is an important task that must be performed during the design phase of an aircraft. In addition to the wind gust load prediction requirements required for aircraft strength design, verification of wind gust load mitigation techniques is also required. In order to better develop the research of gust response and gust load alleviation, gust field calibration tests need to be developed, so that gust field characteristics of the built gust generator, such as whether gust field waveforms are pure, the influence range of the gust field, the gust amplitude and the like, are determined. In the wind gust field calibration test, the most important is a wind gust field calibration device for installing a calibration probe. The wind farm calibration device needs to meet the installation requirements of different probes (such as a hot wire and a five-hole probe), and can also move rapidly, so that the hole occupation test time is saved, and meanwhile, the requirements of strength and stability are met.
Disclosure of Invention
In order to solve the problems, the invention aims to provide the gust wind field calibration device, which effectively solves the defects of high manufacturing cost, more installation equipment in a wind tunnel and larger influence on the quality of a convection field of the existing automatic moving device, and solves the problems of perforation on a wind tunnel wall plate, damage to the wind tunnel and the like.
The invention is realized mainly by the following technical scheme: the utility model provides a gust flow field school survey device, includes school survey harrow, upper and lower mount pad and multiunit front rectification wing section and back rectification wing section, upper and lower mount pad respectively with the upper and lower end fixed connection of back rectification wing section, the linear guide is installed to the leading edge of back rectification wing section linear guide on install a plurality of front rectification wing sections respectively, the one end of school survey harrow and the front rectification wing section fixed connection of intermediate position, the other end of school survey harrow is connected with many school detection needles respectively through many spinal branchs pole, upper and lower mount pad respectively compress tightly fixedly with the upper and lower wall of wind-tunnel respectively through compressing tightly the piece.
Further, the bottom surface of the lower mounting seat is provided with a telescopic support Ma Lun.
Further, the rear rectifying wing section is provided with a wire slot, and a wire slot cover plate is covered on the wire slot.
The invention has the following advantages and beneficial effects: the invention improves the efficiency of replacing the calibration position and shortens the hole occupying time; the mode of the calibration rake can be adopted to simultaneously install a plurality of different calibration probes, so that the test calibration efficiency is improved, and the purpose that different equipment can be subjected to comparison tests by one-time calibration is realized; has the advantages of strong practicability, ingenious structure, simple and convenient disassembly and assembly, etc.
Description of the drawings:
fig. 1 is a schematic structural diagram of a wind gust field calibration device according to the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a top view of fig. 1.
Fig. 4 is a cross-sectional view of the intermediate position of fig. 1.
The device comprises a calibration rake, an upper mounting seat, a lower mounting seat, a rear rectifying wing section, a front rectifying wing section, a linear guide rail, a wire slot cover plate, a pressing piece, 9, ma Lun, 10, a supporting rod, 11, a calibration probe, 12, a wire slot, 13, a linear guide rail, 14 and a positive nut.
The specific embodiment is as follows:
the invention is further illustrated by the following examples according to the drawings of the specification:
example 1
As shown in fig. 1-2, the gust wind field calibrating and measuring device comprises a calibrating and measuring rake, an upper mounting seat, a lower mounting seat, a plurality of groups of front rectifying wing sections and a rear rectifying wing section, wherein the upper mounting seat and the lower mounting seat are respectively fixedly connected with the upper end and the lower end of the rear rectifying wing section, the front edge of the rear rectifying wing section is provided with a linear guide rail, a plurality of front rectifying wing sections are respectively arranged on the linear guide rail, one end of the calibrating and measuring rake is fixedly connected with the front rectifying wing section at the middle position, the other end of the calibrating and measuring rake is respectively connected with three calibrating and measuring probes through three supporting rods, and the upper mounting seat and the lower mounting seat are respectively fixedly pressed with the upper wall surface and the lower wall surface of a wind tunnel through a gasket locking piece and a nylon gasket. The bottom surface of lower mount pad install scalable fortune Ma Lun. The rear rectifying wing section is provided with a wire slot, and a wire slot cover plate is covered on the wire slot. When the wind-array wind field is calibrated, a certain gap is reserved between the device and the upper wall surface of the wind tunnel, the nylon gasket placed in the gap is locked through the gasket locking piece, the device and the upper wall of the wind tunnel are fixed, then the lower mounting seat and the lower wall surface of the wind tunnel are pressed and fixed, and then the probe acquisition line installed in the calibrating and measuring rake is led out of the hole through the wire slot and connected with the acquisition equipment. After the calibration of a certain calibration point is finished, the upper pressing piece and the lower pressing piece are loosened, and the Fuma wheel contracted in the mounting seat is put down, so that the calibration device can be moved to the next point to be calibrated. As shown in fig. 3-4, the calibration rake is connected with the front rectifying wing section through the positive and negative nuts, the cover plate of the calibration rake is opened to replace different probes, and one calibration rake can be provided with three probes at a time, so that the test efficiency is improved, and the purpose that one test can be used for carrying out comparison tests of different calibration equipment is realized; a plurality of calibration rakes can be installed for simultaneous test in one calibration, so that the single calibration range is increased, and a certain probe is broken without stopping wind.
The upper mounting seat and the lower mounting seat of the device are connected with the wind tunnel wall plate through compaction, and holes are not required to be formed in the wind tunnel wall plate, so that the problems of hole forming on the wind tunnel wall plate, damage to the wind tunnel and the like are solved; the front rectifying wing section of the device is detachable, a linear guide rail is designed, a certain front rectifying wing section to be replaced can be detached, and other front rectifying wing sections can slide up and down; the fuma wheel is contracted into the lower mounting seat during wind tunnel test, and released during next point calibration, so that free movement of the device can be realized, the efficiency of replacing calibration positions is improved, and the hole occupation time is shortened; the device has few installation parts and small interference to a flow field; the calibration rake can be provided with a plurality of different calibration probes at the same time, and one calibration rake can be provided with three probes at a time, so that the test efficiency is improved, and the purpose that one test can perform comparison tests of different calibration equipment is realized; a plurality of calibration rakes can be installed for simultaneous test in one calibration, so that the single calibration range is increased, and a certain probe is broken without stopping wind.
Claims (1)
1. The utility model provides a gust flow field school survey device, includes school survey harrow, upper and lower mount pad and multiunit front rectification wing section and back rectification wing section, its characterized in that: the upper mounting seat and the lower mounting seat are respectively fixedly connected with the upper end and the lower end of the rear rectifying wing section, the front edge of the rear rectifying wing section is provided with a linear guide rail, a plurality of front rectifying wing sections are respectively detachably connected to the linear guide rail, one end of the calibrating rake is fixedly connected with the front rectifying wing sections, the other end of the calibrating rake is respectively connected with a plurality of calibrating probes through a plurality of supporting rods, and when different types of calibrating probes are installed, the calibrating rake is used for realizing one-time test to be capable of carrying out comparison tests of different calibrating equipment; the bottom surface of the lower mounting seat is provided with a telescopic fuma wheel; the rear rectifying wing section is provided with a wire slot, and a wire slot cover plate is covered on the wire slot; a certain gap is reserved between the upper mounting seat and the upper wall surface of the wind tunnel, then a nylon gasket placed in the gap is locked through an upper gasket locking piece, the calibration device is fixed with the upper wall of the wind tunnel, a certain gap is reserved between the lower mounting seat and the lower wall surface of the wind tunnel, then the nylon gasket placed in the gap is locked through a lower gasket locking piece, the lower mounting seat is tightly pressed and fixed with the lower wall surface of the wind tunnel, and then a calibration probe acquisition line is led out of the hole through a wire slot to be connected with acquisition equipment; after the calibration of a certain calibration point is finished, the upper gasket locking piece and the lower gasket locking piece are loosened, and meanwhile, the Fuma wheel contracted in the mounting seat is put down, so that the calibration device can be moved to the next point to be calibrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111160871.6A CN113899524B (en) | 2021-09-30 | 2021-09-30 | Gust flow field calibration device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111160871.6A CN113899524B (en) | 2021-09-30 | 2021-09-30 | Gust flow field calibration device |
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| Publication Number | Publication Date |
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| CN113899524A CN113899524A (en) | 2022-01-07 |
| CN113899524B true CN113899524B (en) | 2024-03-12 |
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| CN202111160871.6A Active CN113899524B (en) | 2021-09-30 | 2021-09-30 | Gust flow field calibration device |
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