CN115031919A

CN115031919A - Continuous wind tunnel two-throat channel

Info

Publication number: CN115031919A
Application number: CN202210956720.XA
Authority: CN
Inventors: 王冰冰; 崔晓春; 孟凡民; 张刃; 阎莉
Original assignee: AVIC Shenyang Aerodynamics Research Institute
Current assignee: AVIC Shenyang Aerodynamics Research Institute
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2022-09-09
Anticipated expiration: 2042-08-10
Also published as: CN115031919B

Abstract

A continuous wind tunnel two-throat passage belongs to the technical field of aerodynamic force tests. The device comprises an adjusting group consisting of a front wall plate, a front adjusting sheet, a rear adjusting sheet, a follow-up plate, a rear wall plate and an adjusting mechanism, and a supporting frame consisting of a stand column and an upper wall plate and a lower wall plate, wherein two ends of the stand column are fixedly connected with the upper wall plate and the lower wall plate, and the upper side and the lower side of the supporting frame are respectively and symmetrically provided with the adjusting group; the front wall plate and the rear wall plate are respectively arranged on the front side and the rear side of the upper wall plate and the lower wall plate, the two ends of the front adjusting sheet are hinged with the front wall plate and the rear adjusting sheet, the rear adjusting sheet is hinged with the follow-up plate, the follow-up plate is fixedly connected with the rear wall plate, and the two ends of the adjusting mechanism are connected with the front adjusting sheet and the upper wall plate and the lower wall plate. The invention aims to solve the problems that the existing two-throat structure mode for adjusting the area of the two-throat is single, or the Mach number range is narrow, or only part of mechanisms can adjust the area of the two-throat in real time.

Description

Continuous wind tunnel two-throat channel

Technical Field

The invention relates to a wind tunnel two-throat passage, and belongs to the technical field of aerodynamic force tests.

Background

Wind tunnels have played a very important role in aerodynamic research and in aircraft aerodynamic design. The second throat is positioned at the downstream of the test section, so that the energy loss of the airflow can be reduced, the operating pressure ratio of the wind tunnel is reduced, the airflow is stabilized, and the like. The existing two throat ways are as follows:

the fixed wall type, the geometric dimension and the shape are fixed and unchanged, and the area of the two throats is not adjustable;

the adjustable type wind tunnel is adjustable, the shape of the two throats is adjusted in advance before the wind tunnel runs, and the sectional area of the two throats can be adjusted to be smaller after the wind tunnel is started. The adjustable adjusting sheet with the side wall is used for prefabricating the geometric shape of the adjusting sheet before the wind tunnel runs, and the area of the two throats is reduced after the wind tunnel is started, and the shape of the two throats is prefabricated generally;

the grid finger type can adjust the sectional area of the two throats by controlling the expansion and contraction quantity of the grid finger at the position of the two throats in real time in the operation of the wind tunnel; the device is used at subsonic speed, and is used by means of other flow field control measures at supersonic speed;

in the Mach number fine adjustment mechanism form, a central body of a core component of the Mach number fine adjustment mechanism is a quadrangle formed by four adjusting sheets, the sectional area of the position of the two throats is adjusted in real time by controlling the opening and closing angle of the quadrangle during the operation of the wind tunnel, and the Mach number fine adjustment mechanism form is usually combined with a fixed wall type.

In summary, the two-throat structural form can adjust the area of the two throats in a single mode, or in a narrow mach number range, or only a part of mechanisms can adjust the area of the two throats in real time. Therefore, it is desirable to provide a novel continuous wind tunnel two-throat channel to solve the above technical problems.

Disclosure of Invention

The present invention has been developed in order to solve the problems of the prior art two-throat configuration in which the two-throat area is adjusted in a single manner, or in which the mach number range is narrow, or in which only a portion of the mechanism is capable of adjusting the two-throat area in real time, and a brief summary of the present invention is provided below in order to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention.

The technical scheme of the invention is as follows:

a continuous wind tunnel secondary throat comprises a front wall plate, a front adjusting sheet, a rear adjusting sheet, a follow-up plate, a rear wall plate, an adjusting mechanism and a supporting frame, wherein the upper wall plate, the lower wall plate and upright posts are combined to form the supporting frame;

the front wall plate and the rear wall plate are fixedly mounted on the front side and the rear side of the upper wall plate and the lower wall plate respectively, the front side of the front adjusting sheet is hinged to the front wall plate, the rear side of the front adjusting sheet is hinged to the front side of the rear adjusting sheet, the rear side of the rear adjusting sheet is hinged to the front side of the follow-up plate, the rear side of the follow-up plate is fixedly connected with the rear wall plate, one end of the adjusting mechanism is hinged to the rear side of the front adjusting sheet, and the other end of the adjusting mechanism is fixedly mounted on the upper wall plate and the lower wall plate.

Preferably: the front and the back of the outer side of the supporting frame are respectively fixedly sleeved with a front sealing cover and a back sealing cover, and the supporting frame is sealed with the front sealing cover and the back sealing cover through adhesive tapes.

Preferably: the adjusting mechanism comprises a lift, a driving motor and a speed reducer, the driving motor is fixedly connected with the speed reducer, the lift and the speed reducer are both fixed on an adjusting mechanism frame, two ends of the adjusting mechanism frame are rotatably connected with a support through rotating shafts, the support is fixedly installed on an upper wall plate and a lower wall plate, the output end of the driving motor is fixedly connected with the lift through the speed reducer, and the output end of the lift is hinged to the rear side of the front adjusting sheet.

Preferably, the following components: and a reinforcing rib is arranged above the front adjusting sheet.

Preferably: and a reinforcing rib is arranged above the rear adjusting sheet.

Preferably: the length ratio of the front adjusting sheet to the rear adjusting sheet is 0.4-0.5.

The invention has the following beneficial effects:

1. the continuous wind tunnel secondary throat can adjust the area of the secondary throat in real time, has a wide Mach number range and can be used at sub-span supersonic speed;

2. according to the continuous wind tunnel two-throat channel, the adjusting sheet is prefabricated or the wall surface shape of the two-throat channel is adjusted in real time, the central body is opened and closed quickly in real time, the sectional area of the two-throat channel is adjusted, and the purpose of accurately controlling a flow field is achieved;

3. according to the continuous wind tunnel secondary throat, the area of the secondary throat is reduced after the wind tunnel is started, so that the air flow loss can be reduced, the running pressure ratio of the wind tunnel is reduced, the energy consumption during the running of the wind tunnel is saved, and the continuous running time of the wind tunnel is prolonged;

4. according to the continuous wind tunnel secondary throat, the energy consumption is reduced and improved in a limited range under the condition of low Mach number, the energy consumption is greatly reduced to be about half of that of a fixed wall type under the condition of high Mach number, and meanwhile, an inflatable sealing ring between the side wall and the upper and lower wall plates is eliminated, so that the design is simplified, and the maintenance is convenient; when the side wall adjusting sheet is adjusted, the air inflation and deflation are not needed, the adjustment can be carried out in real time, and the practicability is higher.

Drawings

FIG. 1 is a schematic structural view of a continuous wind tunnel two-throat tunnel;

FIG. 2 is a schematic view of the adjustment of the two throats of a continuous wind tunnel;

FIG. 3 is an assembly view of a front seal housing and a rear seal housing of a two-throat continuous wind tunnel;

FIG. 4 is a split view of a front seal cover and a rear seal cover of a second throat of a continuous wind tunnel;

FIG. 5 is a cross-sectional view A-A of FIG. 2;

FIG. 6 is an enlarged view taken at I in FIG. 5;

FIG. 7 is an enlarged view taken at point II of FIG. 5;

FIG. 8 is a schematic view of the construction of the support frame of the present invention;

FIG. 9 is a perspective view of the support frame of the present invention;

fig. 10 is a schematic view of the installation of the adjustment mechanism of the present invention.

In the figure, 1-a front wall plate, 2-a front adjusting sheet, 3-a rear adjusting sheet, 4-a follower plate, 5-a rear wall plate, 6-an adjusting mechanism, 7-an upper wall plate, a lower wall plate, 8-a vertical column, 9-a lifter, 10-a driving motor, 11-a reducer, 12-a mach number fine adjustment mechanism, 13-a front tail extension plate, 14-a central body, 15-a rear tail extension plate, 16-a front sealing cover, 17-a rear sealing cover, 18-an adhesive tape, 19-an adjusting mechanism frame, 20-a rotating shaft, 21-a support and 22-a sealing groove.

Detailed Description

In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that this description is made only by way of example and not as a limitation on the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The connection mentioned in the invention is divided into fixed connection and detachable connection, the fixed connection is non-detachable connection and comprises but is not limited to folding connection, rivet connection, bonding connection, welding connection and other conventional fixed connection modes, the detachable connection comprises but is not limited to threaded connection, buckle connection, pin connection, hinge connection and other conventional detaching modes, when the specific connection mode is not clearly limited, at least one connection mode can be found in the existing connection modes by default to realize the function, and the skilled person can select according to the needs. For example: the fixed connection selects welded connection, and the detachable connection selects hinged connection.

The first embodiment is as follows: the continuous wind tunnel two-throat channel of the embodiment is described with reference to fig. 1 to 10, and comprises a front wall plate 1, a front adjusting plate 2, a rear adjusting plate 3, a follow-up plate 4, a rear wall plate 5, an adjusting mechanism 6 and a supporting frame, wherein the upper wall plate 7, the lower wall plate 7 and upright posts 8 are combined to form the supporting frame, the number of the upright posts 8 is multiple, the upper side and the lower side of each upright post 8 are fixedly connected with the upper wall plate 7 and the lower wall plate 7, the front wall plate 1, the front adjusting plate 2, the rear adjusting plate 3, the follow-up plate 4, the rear wall plate 5 and the adjusting mechanism 6 form adjusting groups, and the upper side and the lower side of the supporting frame are respectively and symmetrically provided with the adjusting groups; the front wall plate 1 and the rear wall plate 5 are respectively fixedly arranged at the front side and the rear side of an upper wall plate 7 and a lower wall plate 7, the front side of a front adjusting sheet 2 is hinged with the front wall plate 1, the rear side of the front adjusting sheet 2 is hinged with the front side of a rear adjusting sheet 3, the rear side of the rear adjusting sheet 3 is hinged with the front side of a follower plate 4, the rear side of the follower plate 4 is fixedly connected with the rear wall plate 5, one end of an adjusting mechanism 6 is hinged with the rear side of the front adjusting sheet 2, the other end of the adjusting mechanism 6 is fixedly arranged on the upper wall plate 7 and the lower wall plate 7, the front adjusting sheet 2 and the rear adjusting sheet 3 are two plate type side wall adjusting sheets, the adjusting mechanism 6 comprises a lifter 9, a driving motor 10 and a speed reducer 11, the driving motor 10 is fixedly connected with the speed reducer 11, the lifter 9 and the speed reducer 11 are both fixed on an adjusting mechanism frame 19, the two ends of the adjusting mechanism frame 19 are rotatably connected with a support 21 through a rotating shaft 20, and a support 21 is fixedly arranged on the upper wall plate 7 and the lower wall plate 7, the output end of a driving motor 10 is fixedly connected with a lifter 9 through a speed reducer 11, the output end of the lifter 9 is hinged with the rear side of a front adjusting sheet 2, the driving motor 10 drives the lifter 9 to work through the speed reducer 11, the lifter 9 drives the front adjusting sheet 2 and a rear adjusting sheet 3 which are hinged with each other while lifting, the angle between the front adjusting sheet and the rear adjusting sheet is adjusted, the cross section width of two throats is adjusted, the flow area is changed, and the purpose of adjusting and controlling the flow field is achieved. The relative positions of the front adjusting blade 2 and the rear adjusting blade 3 can be prefabricated before the wind tunnel blows and can also be adjusted during the wind blowing.

A front sealing cover 16 and a rear sealing cover 17 are fixedly sleeved on the front and the rear of the outer side of a supporting frame formed by combining the upper wall plate 7, the lower wall plate 7 and the upright post 8 respectively, the upper wall plate 7, the lower wall plate 7, the front sealing cover 16 and the rear sealing cover 17 are sealed through rubber strips 18, and the rubber strips 18 are arranged between the upper wall plate 7 and the lower wall plate 7 and the front sealing cover 16, as shown in fig. 7. A sealing groove 22 is designed on the outer side of the supporting frame, sealing rubber strips are embedded in the sealing groove 22, and the sealing rubber strips can be pressed tightly after the front sealing cover 16 and the rear sealing cover 17 are fixedly connected with the supporting frame. Because preceding adjustment sheet 2, back adjustment sheet 3 and follower plate 4 need have 3mm movement clearance under adjustment mechanism 6's drive, if adopt inflatable seal circle sealed, it is inconvenient to maintain, consequently with preceding sealed cowling 16, back sealed cowling 17 with go up lower wallboard 7 and link firmly, and have joint strip to seal, guarantee preceding adjustment sheet 2, back adjustment sheet 3 and go up the sealing between lower wallboard 7.

The reinforcing ribs are arranged above the front adjusting piece 2 and the rear adjusting piece 3, and the purpose is to prevent the front adjusting piece 2 and the rear adjusting piece 3 from deforming under the action of air flow, so that the shape of the side wall of the two throats cannot be controlled.

The length ratio of the front adjusting sheet 2 to the rear adjusting sheet 3 is 0.4-0.5.

The Mach number fine adjustment mechanism 12 is further included, and the Mach number fine adjustment mechanism 12 is arranged on the horizontal central axis of the supporting frame. The mach number fine adjustment mechanism 12 comprises a front tail extension plate 13, a central body 14 and a rear tail extension plate 15, wherein the front side and the rear side of the central body 14 are respectively hinged with the front tail extension plate 13 and the rear tail extension plate 15. The electric cylinder is adopted to drive the central body 14, so that the central body 14 is rapidly opened and closed, the width of the section of the two throats is adjusted, the area of a flow channel is changed, a flow field is accurately adjusted and controlled, and the electric cylinder is matched with the two throat adjusting pieces for use.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …", "above … …", "above … …, on a surface", "above", and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways, such as by rotating it 90 degrees or at other orientations, and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, a person skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore the invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the invention.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous wind tunnel two-throat passage is characterized in that: the adjustable wall plate comprises a front wall plate (1), a front adjusting sheet (2), a rear adjusting sheet (3), a follow-up plate (4), a rear wall plate (5), an adjusting mechanism (6) and a supporting frame, wherein the upper wall plate and the lower wall plate (7) are combined with stand columns (8) to form the supporting frame, the stand columns (8) are multiple in number, the upper side and the lower side of each stand column (8) are fixedly connected with the upper wall plate and the lower wall plate (7), the front wall plate (1), the front adjusting sheet (2), the rear adjusting sheet (3), the follow-up plate (4), the rear wall plate (5) and the adjusting mechanism (6) form adjusting groups, and the upper side and the lower side of the supporting frame are respectively and symmetrically provided with the adjusting groups;

preceding wallboard (1) and back wallboard (5) are both sides around wallboard (7) about fixed mounting respectively, and the front side of preceding adjustment sheet (2) is articulated with preceding wallboard (1), and the rear side of preceding adjustment sheet (2) is articulated with the front side of back adjustment sheet (3), and the rear side of back adjustment sheet (3) is articulated with the front side of trailing plate (4), the rear side and back wallboard (5) fixed connection of trailing plate (4), and adjustment mechanism (6) one end is articulated with the rear side of preceding adjustment sheet (2), and adjustment mechanism (6) other end fixed mounting is on wallboard (7) about on.

2. The continuous wind tunnel two-throat according to claim 1, wherein: the front and the back of the outer side of the supporting frame are respectively and fixedly sleeved with a front sealing cover (16) and a back sealing cover (17), and the supporting frame is sealed with the front sealing cover (16) and the back sealing cover (17) through adhesive tapes (18).

3. The continuous wind tunnel two-throat according to claim 1, wherein: adjustment mechanism (6) include lift (9), driving motor (10) and reduction gear (11) are connected admittedly, lift (9) and reduction gear (11) are all fixed on adjustment mechanism frame (19), it is connected to establish rotation with support (21) through rotation axis (20) at adjustment mechanism frame (19) both ends, support (21) fixed mounting is on wallboard (7) from top to bottom, and driving motor (10) output passes through reduction gear (11) and lift (9) fixed connection, the output of lift (9) is articulated with the rear side of preceding adjustment sheet (2).

4. The continuous wind tunnel two-throat according to claim 1, wherein: and a reinforcing rib is arranged above the front adjusting sheet (2).

5. The continuous wind tunnel two-throat according to claim 4, wherein: and a reinforcing rib is arranged above the rear adjusting sheet (3).

6. A continuous wind tunnel two-throat according to claim 5, wherein: the length ratio of the front adjusting sheet (2) to the rear adjusting sheet (3) is 0.4-0.5.