CN111982452A - Planting device for planting fluorescent microfilaments on surface of wing - Google Patents
Planting device for planting fluorescent microfilaments on surface of wing Download PDFInfo
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- CN111982452A CN111982452A CN202010739630.6A CN202010739630A CN111982452A CN 111982452 A CN111982452 A CN 111982452A CN 202010739630 A CN202010739630 A CN 202010739630A CN 111982452 A CN111982452 A CN 111982452A
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- planting
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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
- G01M9/02—Wind tunnels
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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
- G01M9/02—Wind tunnels
- G01M9/04—Details
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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
- G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
- G01M9/067—Measuring arrangements specially adapted for aerodynamic testing dealing with flow visualisation
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a planting device for planting fluorescent microfilaments on the surface of an airfoil, which comprises: the upper part of the copper pipe is a hollow cylinder, and the lower part of the copper pipe is a solid cylinder; the inside of the hollow cylinder is used for injecting adhesive; the two wire clamping grooves are two strip-shaped grooves formed in the outer wall of the hollow column body and are arranged at intervals along the axis direction of the hollow column body; the opening is arranged on the outer wall of the hollow column body, is positioned between the two wire clamping grooves and is used for communicating the bottom ends of the two wire clamping grooves; and the opening is used for providing an inlet for the silk thread to enter the two thread clamping grooves, so that two ends of the silk thread are hung in the two thread clamping grooves respectively. Solves the problems of complex operation and infirm operation of the existing copper pipe filament planting method.
Description
Technical Field
The invention belongs to the technical field of wind tunnel tests, and particularly relates to a planting device for planting fluorescent microfilaments on the surface of an airfoil.
Background
The fluorescent microfilament flow display technology is widely applied to various wind tunnel and external field tests due to the characteristics of simple operation, wide application range, small influence on a flow field and the like. The technology is a new method for observing the surface flow field of a test model based on the conventional silk thread flow display technology, and the fluorescent microfilament is made of synthetic fibers containing fluorescent substances and then fixed on the surface of the test model. The silk thread made of the fiber has extremely small diameter, can ensure the precision and the authenticity of a flow field near the model to a great extent, and greatly reduces the influence on the surface flow field of the test model. Under the irradiation of visible light, the microfilament is difficult to observe and shoot, and the ultraviolet light is used for irradiating the fluorescent microfilament to excite the fluorescence with higher brightness, so that the silk thread state can be clearly observed, shot and recorded. The method applied at present is to use a micro-punching tool to punch holes on the surface of an airfoil, then use a fluorescent filament to penetrate through a slender copper pipe, plant the copper pipe wrapped with the fluorescent filament in the punched holes on the surface of the airfoil, and finally carry out a wind tunnel test.
The traditional copper pipe filament planting method mainly has the following defects: (1) the operation is complicated, the silk thread needs to be put into the slender copper pipe, and the operation is time-consuming and labor-consuming. (2) The wires planted inside the copper tubes are not very strong. When the traditional method for planting the silk thread wrapped by the copper pipe is planted in a hole punched by a micro punching tool, glue needs to be injected into the copper pipe by using an injector. Because the diameter of the copper pipe is about 1mm, the glue is not smoothly injected into the copper pipe through the injector so that the silk thread is firmly fixed in the copper pipe. This results in a gradual increase in wind speed during the test without the well-anchored wires falling off, thus affecting the final result of the test.
Disclosure of Invention
The invention aims to provide a planting device for planting fluorescent microfilaments on the surface of an airfoil, and aims to solve the problems of complex and unstable operation of the existing copper pipe planting silk thread method.
The invention adopts the following technical scheme: a planting device for planting fluorescent microfilaments in an airfoil surface, comprising:
the upper part of the copper pipe is a hollow cylinder, and the lower part of the copper pipe is a solid cylinder; the inside of the hollow cylinder is used for injecting adhesive;
the two wire clamping grooves are two strip-shaped grooves formed in the outer wall of the hollow column body and are arranged at intervals along the axis direction of the hollow column body;
the opening is arranged on the outer wall of the hollow column body and positioned between the two wire clamping grooves so as to communicate the bottom ends of the two wire clamping grooves;
and the opening is used for providing an inlet for the silk thread to enter the two thread clamping grooves, so that two ends of the silk thread are hung in the two thread clamping grooves respectively.
Further, the method comprises the following steps:
the shrinkage sleeve is a half hollow sleeve cut along the axial direction of the shrinkage sleeve and is used for shielding the opening; the diameter of the bottom of the hollow column body is smaller than that of the top of the hollow column body, and the bottom of the hollow column body is fixedly connected to the intersection surface of the hollow column body and the solid column body; the top part thereof is as follows: open in the natural state and contract after entering the mounting hole.
The invention also adopts a use method of the planting device for planting the fluorescent microfilament on the surface of the airfoil profile, which comprises the following steps:
putting the silk thread into the two wire clamping grooves through the opening;
pressing a solid cylinder of the copper pipe into a mounting hole of the airfoil experimental part until the top surface of a hollow cylinder of the copper pipe is flush with the surface of the airfoil experimental part, and pressing one end of the silk thread into the mounting hole while the other end of the silk thread is left outside the mounting hole;
an adhesive is injected into the interior of the hollow cylinder to secure the filament within the hollow cylinder.
The invention has the beneficial effects that: the thread clamping grooves are formed in the hollow cylinder, so that the complexity of installation of the threads is reduced, the threads are fixed by the aid of the shrinkage sleeves matched with the thread clamping grooves, and glue is injected into the matched injectors to achieve secondary reinforcement; the method for installing the silk thread on the wing model by using the planting method not only can simplify the defects of complexity and complexity of the traditional planting method, but also is more efficient and convenient than the original planting method, and the planted silk thread is more stable.
Drawings
FIG. 1 is a schematic structural diagram of a planting device for planting fluorescent microfilaments on the surface of an airfoil according to the present invention;
FIG. 2 is a schematic view of an installation of a planting device for planting fluorescent microfilaments on the surface of an airfoil according to the present invention;
fig. 3-4 are two schematic structural views of the planting device for planting the fluorescent microfilament on the surface of the airfoil profile, which is provided by the invention, with different opening shapes after the shrink sleeve is removed.
The test device comprises a test piece, a hollow column body, a wire clamping groove, a contraction sleeve, a solid column body, an airfoil type experimental piece, a mounting hole, an opening and a silk thread, wherein the test piece comprises 1 part of a hollow column body, 2 parts of wire clamping grooves, 3 parts of contraction sleeves, 4 parts of solid column bodies, 5 parts of airfoil type experimental pieces, 6 parts of mounting holes, 7.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the present invention provides a planting device for planting fluorescent microfilaments on an airfoil surface, comprising, in some embodiments: copper pipe, two wire clamping grooves 2 and an opening 7. The copper pipe is divided into an upper part and a lower part, the upper part is a hollow cylinder 1, the lower part is a solid cylinder 4, and an adhesive for fixing the silk thread and the copper pipe is injected into the hollow cylinder 1. Two wire clamping grooves 2 are formed in the outer wall of the hollow column body 1, the two wire clamping grooves 2 run in the same direction of the axis of the hollow column body 1, the two wire clamping grooves 2 are arranged at intervals, the size of each wire clamping groove 2 is not limited, and the wire clamping grooves are usually selected according to the diameter of a silk thread 8 and are about 0.5mm larger than the diameter of the silk thread 8. The thread clamping grooves 2 are arranged to enable two ends of the silk thread 8 to penetrate through the two thread clamping grooves 2 respectively, and the silk thread 8 can be clamped in the two thread clamping grooves 2 after the two thread clamping grooves are lifted upwards. The exposed length of the wire 8 is not uniform. For example, the length of the left side of the silk thread 8 is smaller than that of the right side of the silk thread 8, so that the silk thread 8 on the left side can be completely embedded into the mounting hole 6 punched by the micro-punching tool in the process of planting the silk thread 8, and the length of the right side can be exposed to a proper length. Therefore, the silk thread 8 can be conveniently embedded into the copper pipe, and the silk thread 8 can be pressed by the side wall of the mounting hole 6 to be firmer.
The silk thread 8 is a fluorescent microfilament which needs to be firmly fixed inside the copper tube in the experimental process. In order to facilitate the arrangement of the silk threads 8 into the two thread clamping grooves 2, an opening 7 is formed in the outer wall of the hollow column body 1, and the opening 7 is located between the two thread clamping grooves 2 and used for communicating the bottom ends of the two thread clamping grooves 2. As shown in fig. 3-4, the form of the opening 7 is not limited, and the purpose of conveniently hanging the silk thread 8 can be achieved as long as the bottom ends of the two thread clamping grooves 2 are communicated. The openings 7 may therefore be in the form of elongated slots, beveled cut-outs, or rectangular cut-outs as shown in fig. 1.
The copper pipe used in the traditional mode is hollow at two ends, and the lower part of the hollow part can deform in the planting process in actual operation, so that the copper pipe is not easy to plant, therefore, the lower section of the copper pipe is improved, the hollow pipe is changed into a solid pipe, and the arrangement of the hollow pipe is reserved at the upper section. Through set up opening 7 and two card wire casing 2 on hollow column 1, simplified the loaded down with trivial details degree of installation of silk thread 8, it is more high-efficient convenient than original planting method, the silk thread of planting is more firm.
As shown in fig. 1, a planting device for planting fluorescent microfilaments on the surface of an airfoil also comprises a shrink sleeve 3, which is a half hollow sleeve cut along the axis direction of the shrink sleeve and is arranged to cover the opening 7, close the hollow cylinder 1 and prevent the silk threads 8 from falling off, so that the silk threads 8 can be completely positioned in the hollow cylinder 1 and do not flow out when adhesives are injected, and the silk threads 8 can be better fixed in the copper pipe. The diameter of the bottom of the shrink sleeve 3 is smaller than that of the top, and the shrink sleeve is in an inverted trumpet shape. The bottom of the shrink sleeve 3 is fixedly connected with the intersection surface of the hollow column body 1 and the solid column body 4. The top of the shrink sleeve 3 has two states: firstly, open under natural state, secondly shrink to parcel and live opening 7 after following the copper pipe and getting into mounting hole 6 inside. The material of shrink sleeve 3 is not limited, only need make it can realize the top and switch between two kinds of states, for example for elastic material, metal material all can.
The invention also provides a use method of the planting device for planting the fluorescent microfilaments on the surface of the airfoil, and the planting device for planting the fluorescent microfilaments on the surface of the airfoil comprises the following steps:
the silk thread 8 is placed in the two wire clamping grooves 2 through the opening 7 and hung, the left and right exposure lengths of the silk thread 8 are different, and the specific left and right exposure lengths are determined according to actual conditions;
pressing the solid cylinder 4 of the copper pipe into the mounting hole 6 of the wing-shaped experimental part 5, and then shrinking the shrinkage sleeve 3 to automatically draw the shrinkage sleeve towards the opening 7 so as to seal the opening 7;
continuously pressing the copper pipe until the top surface of the hollow cylinder 1 of the copper pipe is flush with the surface of the airfoil experimental part 5, pressing one end of the silk thread 8 into the mounting hole 6, and leaving the other end outside the mounting hole 6;
injecting an adhesive into the hollow cylinder 1 to fix the silk thread in the hollow cylinder 1, standing for a period of time, and waiting for the glue to be cured;
and (5) carrying out a wind tunnel test, and observing and recording by an operator.
Traditional planting method need let the fluorescence silk thread pass through long and thin copper pipe, and this operation is consuming time hard and be difficult to operate, and traditional planting method can have the insecure phenomenon of planting because glue pours into the problem into and can make the silk thread to have moreover, very easily drops in the experimentation and influences the experimental result. The planting device for planting the fluorescent microfilaments on the surface of the wing is characterized in that the upper half section of the planting device is a hollow cylinder, the two symmetrical wire clamping grooves 2 are formed in the hollow cylinder, and the silk threads 8 can be conveniently placed into the wire clamping grooves 2 at the two ends, so that the efficiency is higher than that of a traditional planting method.
Claims (3)
1. A planting device for planting fluorescent microwires on airfoil surfaces, comprising:
a copper pipe, the upper part of which is a hollow cylinder (1) and the lower part of which is a solid cylinder (4); the hollow cylinder (1) is internally used for injecting an adhesive;
the two wire clamping grooves (2) are two strip-shaped grooves formed in the outer wall of the hollow column body (1) and are arranged at intervals along the axial direction of the hollow column body (1);
the opening (7) is arranged on the outer wall of the hollow column body (1) and is positioned between the two wire clamping grooves (2) so as to communicate the bottom ends of the two wire clamping grooves (2);
the opening (7) is used for providing an inlet for a silk thread (8) to enter the two wire clamping grooves (2), so that two ends of the silk thread (8) are hung in the two wire clamping grooves (2) respectively.
2. A planting device for planting fluorescent microwires on airfoil surfaces according to claim 1, comprising:
a shrink sleeve (3) which is a half hollow sleeve cut along the axial direction thereof and used for shielding the opening (7); the diameter of the bottom of the hollow column body is smaller than that of the top of the hollow column body, and the bottom of the hollow column body is fixedly connected to the intersection surface of the hollow column body (1) and the solid column body (4); the top part thereof is as follows: is opened in a natural state and is contracted after entering the mounting hole (6).
3. Use of a planting device for planting fluorescent microfilaments on a surface of an airfoil, characterized in that a planting device for planting fluorescent microfilaments on an airfoil surface according to claim 1 or 2 is used, comprising the following:
the silk thread (8) is placed in the opening (7) and hung in the two wire clamping grooves (2);
pressing the copper pipe into a mounting hole (6) of an airfoil experimental part (5) from one end of a solid cylinder (4) until the top surface of a hollow cylinder (1) of the copper pipe is flush with the surface of the airfoil experimental part (5), pressing one end of the silk thread (8) into the mounting hole (6), and leaving the other end outside the mounting hole (6);
injecting an adhesive into the interior of the hollow cylinder (1) to fix the thread in the hollow cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010739630.6A CN111982452B (en) | 2020-07-28 | 2020-07-28 | Planting device for planting fluorescent microfilaments on surface of wing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010739630.6A CN111982452B (en) | 2020-07-28 | 2020-07-28 | Planting device for planting fluorescent microfilaments on surface of wing |
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| Publication Number | Publication Date |
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| CN111982452A true CN111982452A (en) | 2020-11-24 |
| CN111982452B CN111982452B (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010739630.6A Active CN111982452B (en) | 2020-07-28 | 2020-07-28 | Planting device for planting fluorescent microfilaments on surface of wing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114894428A (en) * | 2022-04-15 | 2022-08-12 | 西华大学 | Fluid flow measuring method based on deflection angle of fluorescent microwire |
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| CN111982452B (en) | 2021-09-28 |
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