CN103017998A - Wing section test piece - Google Patents

Abstract

An airfoil test piece, comprising: a wing-shaped shell, which comprises a first end wall part, a second end wall part opposite to the first end wall part and a side wall part, wherein the first end wall part, the second end wall part and the side wall part form a containing cavity; and the flute-shaped pipe test piece is accommodated in the accommodating cavity and used for preventing the airfoil shell from being iced, and two ends of the flute-shaped pipe test piece are respectively and rotatably arranged on the first end wall part and the second end wall part. The invention can adjust the position of the flute-shaped pipe test piece in the anti-icing cavity of the airfoil test piece so as to facilitate the calculation and verification of the optimum position or the approximate optimum position of the flute-shaped pipe test piece in the anti-icing cavity.

Description

An airfoil test piece

technical field

The invention relates to the technical field of ice wind tunnel tests of an aircraft hot gas anti-icing system, in particular to an airfoil test piece.

Background technique

In order to provide data support for the calculation model and check the effectiveness of the anti-icing system, etc., the piccolo test piece is usually designed and fixed into the airfoil test piece for ice wind tunnel test. However, in the ice wind tunnel tests of the existing aircraft hot gas anti-icing system, the position of the piccolo test piece is fixed at a certain position in the anti-icing chamber of the airfoil test piece, that is, the piccolo test piece is inactive.

As we all know, in the development stage of the anti-icing system, the position of the flute tube test piece in the anti-icing chamber, the size, angle, number of rows, hole spacing, row spacing and other parameters of the flute tube test piece need to be comprehensively evaluated to obtain an optimal result. If the piccolo test piece cannot be translated and/or rotated, it will not be possible to adjust the piccolo test piece to obtain the optimum position of the piccolo test piece relative to the anti-icing chamber space.

Contents of the invention

In order to make the position of the piccolo test piece in the anti-icing cavity of the airfoil test piece adjustable to obtain the optimum position or close to the optimum position of the piccolo test piece in the anti-icing cavity, the present invention discloses a An airfoil test piece, which includes: an airfoil shell, which includes a first end wall, a second end wall opposite to the first end wall, and a side wall, the first end wall, the second end wall and the side wall portion to form an accommodation cavity; and a piccolo tube test piece, which is accommodated in the accommodation cavity for anti-icing the airfoil shell, and the two ends of the flute tube test piece are respectively rotatably arranged to the first end wall portion and on the second end wall portion.

Specifically, the first sleeve is fixed on the first end wall of the airfoil shell, the second sleeve is fixed on the second end wall of the airfoil shell, and the two ends of the flute tube test piece are respectively sleeved. into the first casing and the second casing.

More specifically, the airfoil test piece includes a handle and a nut, the end of the handle is provided with threads, the piccolo test piece is provided with a through hole matching the handle, and the second sleeve is provided with a hole for the handle in the circumferential direction. The first slot rotates within a predetermined angle range and the second slot is symmetrical with the first slot along the center of the second casing, the handle passes through the first slot, the through hole and the second slot in turn, and the nut thread Attach to the threads of the set bolt to secure the piccolo test piece relative to the second sleeve.

Preferably, a scale is arranged beside the first slot and/or the second slot of the second sleeve.

Description of drawings

In order to explain the present invention, exemplary embodiments thereof will be described hereinafter by referring to the figures,

In the attached picture:

Fig. 1 schematically shows a perspective view of an airfoil test piece of the present invention;

Figure 2 schematically shows a partial enlarged view of the plane of Figure 1;

Fig. 3 schematically shows the pipette test piece of the airfoil test piece of the present invention and the sleeve pipes at its two ends;

Similar features in different figures are indicated by like reference numerals.

Detailed ways

FIG. 1 schematically shows a perspective view of an airfoil test piece of the present invention, and FIG. 2 schematically shows a partial enlarged view of the plane of FIG. 1 .

Referring to FIG. 1 and FIG. 2 , the airfoil test piece includes a position adjustment assembly 100 , a piccolo test piece 200 and an airfoil casing 300 . Wherein, the position adjustment assembly 100 is used to adjust the position of the piccolo test piece 200 . Wherein, the so-called piccolo test piece 200 is a test element processed to simulate a real piccolo in the anti-icing cavity of the wing in the ice wind tunnel test of the anti-icing system. Here, what is put into the ice wind tunnel for testing is a specially designed and manufactured airfoil test piece, and the airfoil housing 300 is a test piece that simulates the airfoil of a real wing slat. The reason why the corresponding piccolo test piece is set for the real piccolo and the airfoil shell is set corresponding to the airfoil of the wing slat is because the ice wind tunnel test is unlikely to take the real aircraft as the test object. In order to verify the reliability of the anti-icing system, corresponding test pieces will be designed and manufactured.

The airfoil housing 300 includes a first end wall portion 302 , a second end wall portion 304 opposite to the first end wall portion 302 and a side wall portion 306 , the first end wall portion 302 , the second end wall portion 304 and the side wall portion 306 form an accommodation cavity for accommodating the piccolo test piece 200 and the position adjustment assembly 100 .

The position adjustment assembly 100 includes a first cover plate 102 and a second cover plate 104 that secure a piccolo test piece 200 therebetween. Specifically, the first cover 102 is provided with two card slots 106, 108, the card slot 106 has three round holes 112 connected together through the communication slot 110, and the three round holes 112 can define three different positions , the card slot 108 has three circular holes 116 connected together through the communication groove 114, and the three circular holes 116 can define three different positions. Wherein, the three round holes 112 of the card slot 106 and the three round holes 116 of the card slot 108 have the same size and the center distance between each pair is also the same, that is, the card slot 108 is a mirror image of the card slot 106, or in other words, the card slot 108 is a mirror image of the card slot 106. The shape of the groove 106 and the card groove 108 are exactly the same. Similarly, the second cover 104 is also provided with two card slots 118, 120, the card slot 118 has three round holes 122 connected together through the communication slot 119, the three round holes 122 can define three different positions , the card slot 120 has three circular holes 126 connected together through the communication groove 124, and the three circular holes 126 can define three different positions. Wherein, the three round holes 122 of the card slot 118 and the three round holes 126 of the card slot 120 have the same size and the center distances between the two are also the same, that is, the card slot 120 is the mirror image of the card slot 118, or in other words, the card slot 120 is a mirror image of the card slot 118. The shape of the groove 118 and the card groove 120 are exactly the same.

The first end wall portion 302 of the airfoil housing 300 has at least two fixed threaded round holes (not shown), the positions of which correspond to the round holes of the slots 106 and 108 respectively. The two end wall portions 304 also have at least two threaded fixing round holes (not shown), the positions of which correspond to the round holes of the slots 118 and 120 respectively.

The two ends of the flute tube test piece 200 are respectively sleeved into the first sleeve 402 and the second sleeve 404, and the fit is good, and the relative sealing is ensured before the test, while one end of the first sleeve 402 and the second sleeve 404 Welded on the first cover plate 102 and the second cover plate 104, and then the first cover plate 102 is fixed to the first end wall portion 302 of the airfoil housing 300 by two bolts (not shown), wherein one bolt Through a circular hole in the card slot 106 (for example, the first circular hole from the left) and another bolt passes through a circular hole in the card slot 108 that is a mirror image of the aforementioned circular hole (for example, the same as the aforementioned first circular hole) A circular hole corresponding to the first circular hole from the left), so that the first cover plate 102 is firmly fixed together with respect to the first end wall portion 302; the second cover plate 104 is fixed by two bolts 128,130 fixed to the second end wall portion 304 of the airfoil test piece 300, wherein a bolt 128 passes through a round hole in the slot 118 (for example, the first round hole counted from the left as shown in the figure) and Another bolt 130 passes through a circular hole (for example, the first circular hole from the left corresponding to the aforementioned first circular hole) in the card slot 120, so that the second cover The plates 104 are fixedly fixed together relative to the second end wall portion 304 .

In this way, the piccolo test piece 200 is fixed by the first cover plate 102 and the second cover plate 104 to a position on the airfoil test piece 300, that is, the outermost position relative to the airfoil casing 300 as shown in the figure. left position, when it is necessary to adjust the position of the piccolo test piece 200 to the right so that the piccolo tube test piece 200 is farther away from the front edge of the side wall portion 306 of the airfoil casing 300, each bolt can be loosened and then the first cover plate 102 and the second cover plate 104 are pushed to the right and each bolt is locked into the second round hole or the third round hole of the slot 106 , 108 , 118 , 120 respectively.

When the airfoil test piece is placed in the ice wind tunnel simulating various meteorological conditions for testing, the flute tube test piece 200 will eject relatively high-temperature airflow from a plurality of injection holes arranged on it for use in The airfoil shell 300 is ice resistant. When the piccolo test piece 200 needs to be closer to or farther from the leading edge of the sidewall portion 306 of the airfoil casing 300 , adjustments can be made as described above to optimize the hot gas performance of the piccolo test piece 200 .

Those skilled in the art should understand that the slots provided on the first cover plate 102 and the second cover plate 104 may be replaced by three independent round holes provided at different positions. Optionally, a gear can also be provided on the side of the first cover plate 102 close to the first end wall portion 302, correspondingly, a rack is provided on the first end wall portion 302, and additional fasteners are provided, Thereby, the first cover plate 102 can move in translation relative to the airfoil casing 300 , and similarly, a gear and rack structure can also be adopted between the second cover plate 104 and the second end wall portion 304 . No matter how it is set up, as long as the piccolo test piece 200 has at least two spatial positions relative to the airfoil shell 300 .

Those skilled in the art can also understand that the aforementioned bolts 128, 130 can also be replaced by other fasteners. Preferably, the straight line where the slots 106, 108 and each of the other two slots 118, 120 are located is substantially parallel to the leading edge line of the wing. Specifically, the airfoil shell 300 is a slat model, and the first end wall portion 302 and the second end wall portion 304 are respectively slat end ribs of the slat model.

Fig. 3 schematically shows the piccolo test piece of the airfoil test piece of the present invention and the bushings at both ends thereof.

Referring to FIGS. 1-3 , both ends of the piccolo test piece 200 in the airfoil housing 300 can also rotate relative to the first cover plate 102 and the second cover plate 104 . In other words, the two ends of the piccolo test piece 200 are rotatably disposed on the first end wall portion 302 and the second end wall portion 304 respectively.

Specifically, a first sleeve 402 is fixed on the first end wall portion 302 of the airfoil housing 300 , and a second sleeve 404 is fixed on the second end wall portion 304 of the airfoil housing 300 . Both ends of the pipe test piece 200 are sleeved into the first sleeve 402 and the second sleeve 404 respectively.

More specifically, the airfoil test piece also includes a handle 406 and a nut 408, wherein the handle 406 is cylindrical and threaded at the end, and the piccolo test piece 200 is provided with a through hole ( not shown), the second sleeve 404 is circumferentially provided with a first slot 410 for the handle 406 to rotate within a predetermined angle range and is symmetrical with the first slot 410 along the center of the second sleeve 404 The second slot (not shown), the handle 406 passes through the first slot 410, the through hole and the second slot in turn, and the nut 408 is threaded on the handle 406 to place the piccolo test piece 200 relative to the first slot. The second casing 404 is fixed. In order to avoid greatly affecting the flow of hot gas inside the piccolo test piece 200, the outer diameter of the handle 406 located inside the piccolo test piece 200 can be set to be relatively small and the outer diameter of the handle 406 located outside the piccolo test piece 200 to be relatively small. In this way, the boss produced by the diameter change can just be stuck on the outer surface of the piccolo test piece 200.

Preferably, a scale 412 is arranged beside the first slot 410 and/or the second slot of the second sleeve 404 .

Like this, when needing to rotate this pipette test piece 200, the experimenter can loosen this nut 408, and hold this handle 406 and rotate this pipette pipe test piece 200 counterclockwise or clockwise to a certain scale 412, the pipette The tube test piece 200 rotates within the angular range defined by the first slot 410 and the second slot. In addition, since the angle defined by the first slot 410 and the second slot is very small, the piccolo test piece 200 of the present invention can be finely adjusted.

The present invention is not limited in any way to the exemplary embodiments presented in the description and drawings. All combinations of (parts of) embodiments shown and described are expressly understood to be incorporated within this description and expressly understood to fall within the scope of the present invention. Moreover, many variations are possible within the scope of the invention as outlined by the claims. Furthermore, any reference signs in the claims should not be construed as limiting the scope of the invention.

Claims (4)

1. Airfoil Testing spare, it comprises:

The aerofoil profile housing, it comprises the first end wall, second end wall and the side wall portion relative with described the first end wall, described the first end wall, described the second end wall and described side wall portion form container cavity; And

The bourdon's tube testpieces, it is interior for anti-icing to described aerofoil profile housing that it is contained in described container cavity, and the two ends of described bourdon's tube testpieces are set to respectively on described the first end wall and the second end wall rotationally.

2. Airfoil Testing spare according to claim 1, it is characterized in that, be fixed with the first sleeve pipe on the first end wall of described aerofoil profile housing, be fixed with the second sleeve pipe on the second end wall of described aerofoil profile housing, the two ends of described bourdon's tube testpieces are nested with respectively in described the first sleeve pipe and described the second sleeve pipe.

3. Airfoil Testing spare according to claim 2, it is characterized in that, described Airfoil Testing spare comprises handle and nut, the end of described handle is furnished with screw thread, described bourdon's tube testpieces is provided with the through hole suitable with described handle, described the second sleeve pipe upwards offer in week have the first slit of in predetermined angular range, rotating for described handle and with centrosymmetric second slit of described the first slit along described the second sleeve pipe, described handle passes described the first slit successively, described through hole and described the second slit, described nut thread connect on the screw thread of described fastening bolt so that relatively described the second sleeve pipe of described bourdon's tube testpieces is fixed.

4. Airfoil Testing spare according to claim 3 is characterized in that, the other scale that also is furnished with of the first slit of this second sleeve pipe and/or the second slit.

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