JP2680207B2 - Environmental wind tunnel test equipment and blowing nozzle for the equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an environmental wind tunnel test apparatus such as an environmental test apparatus for an automobile and a blowing nozzle for the apparatus.

[0002]

2. Description of the Related Art As a structure for changing the blowing nozzle area of the wind tunnel of an environmental wind tunnel device, for example, a structure for changing only the contraction plates on the upper surface to be movable, a structure for changing only the contraction plates on both side surfaces to be movable, When the vertical direction and the horizontal direction are changed at the same time to change the area, there is known a structure in which nozzles of different types are replaced.

[0003] Related to this kind of thing, for example, "Ebara Time Report" (pages 25 to 30) No. 13
6 (1987-1).

[0004]

As a problem in the case of the structure in which two kinds of nozzles having different blowing areas are exchanged in the above-mentioned prior art, there is a problem that the space is wide enough to accommodate another blowing nozzle. However, there is such a problem that the transport moving mechanism for replacing the two blowing nozzles becomes large-scale, the cost is increased, and it is practically impossible to cope with three or more blowing areas.

An object of the present invention is to provide an environmental wind tunnel testing device and a blowing nozzle for the device, which can easily change the blowing area.

[0006]

[Means for Solving the Problems] The purpose of the above is
Environment with blowing nozzles formed from contraction plates on both sides
Position of the flow reduction plates on the bottom and both sides of the wind turbine tester
The upper side of the flow reduction plate at the upstream end of the flow reduction plate.
It can be moved up and down between the compression plates on both sides with the center
With the structure of
Achieved by installing a flow pad. Also above
The purpose is to create a blower formed by the contraction plates on the upper and lower surfaces and on both sides.
In the environmental wind test equipment equipped with a discharge nozzle,
Fix the position of the contraction plate on the lower surface, and fix the position of the contraction plate on both sides.
It is fixed and the contraction plates on both sides are movable left and right,
Inside of the contraction plate on either or both of the upper and lower surfaces
Achieved by attaching a removable contraction pad to the
Is done. Furthermore, the above-mentioned purpose is to reduce the upper and lower surfaces and both side surfaces.
For blowing nozzles for environmental wind test equipment formed from a flow plate
And fix the positions of the contraction plates on the bottom and both sides, and
At the upstream end of the contraction plate, the contraction plate is centered around the hinge.
The structure is such that it can move vertically between both contraction plates, and both sides are contracted.
To attach a detachable contraction pad inside the flow board
Is achieved. Furthermore, the above-mentioned purpose is
Blow-off for environmental wind test equipment formed from contraction plates on both sides
Fixed the position of the contraction plates on the top and bottom of the nozzle
The contraction plates on both sides are movable left and right,
Shrink inside the shrink plate on either the top or bottom or both sides
Achieved by installing a flow pad.

[ Operation ] The air flow blown from the blowing nozzle is
A removable compression pad can be attached to the inside of either side
Since it is installed, you can arbitrarily change the blowing area of the air flow
Can be.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
This will be described below.

In FIG. 1, 1 is a wind tunnel (side fixed) part, 2 is a blowing nozzle, 3 is a test vehicle, and 2a, 2b and 2c are a movable contracting plate and a contracting plate on the upper surface of the blowing nozzle, respectively. It is a drive mechanism for moving up and down and a hinge for moving the same contraction plate. Reference numeral 4 is a rear deflector for changing the air flow in the rear part of the vehicle under test 3 toward the wind tunnel suction duct 5 in a direction perpendicular to the air flow. Reference numeral 6 denotes a chassis roller of a chassis dynamometer for absorbing power in the running state of the test vehicle.

In FIG. 2, when the blowing area of the blowing nozzle is large, it is shown in the width direction Wa and the height direction Ha, and when the blowing area is small, it is shown in the width direction Wb and the height direction Hb.

Here, the case where the blowing area is increased from large to small will be described.

First, the movable contraction plates 2a on both sides (left and right) are moved to lower the movable contraction plate 2a on the upper side to set the height to Hb. Next, inside the contraction plates on both sides of the blow-out nozzle, the structure of the detachable lightweight panel was adopted.
By mounting and fixing a, 7b, 7c, and 7d, the width direction of the blowout nozzle is reduced to the dimension of Wb. By doing so, the blowing area of the blowing nozzle can be reduced from Fa = Wa × Ha to Fb = Wb × Hb.

FIG. 3 is an explanatory view of a detailed structure of the contraction pads 7a and 7b.

In FIG. 3, the contraction pad has a two-part structure of a lower part 7a and an upper part 7b as shown in the figure. This is to make the work easier when attaching or detaching the two-piece structure rather than the one-piece structure. That is, when the contraction pads 7a and 7b are attached, the lower contraction pad 7a is first attached. In this case, the contraction pad 7a is provided with a mounting bolt 8a.
On the other hand, on the other hand, the contraction plate on the side surface of the blow-out nozzle 2 is machined together with this bolt 8a and a mounting hole (not shown)
The bolt 8a is inserted into this hole and then tightened with a nut to mount it. Incidentally, 9a is provided with a hand for convenience in attaching and detaching.

Next, the upper contraction pad 7b is attached. However, since the heights of the contraction pads 7a to 7c are higher toward the upstream side of the blowout nozzle (from the front to the back of the figure), once the contraction pad 7a is put inside the blowout nozzle. Then, on the upper surface of the lower contraction pad 7a,
The upper contraction pad 7b is put on and slid so that it is positioned while moving toward the front, and the lower contraction pad 7a is attached in the same manner.

Further, the removing method is carried out by following the above sequence in the reverse direction.

On the other hand, the right side is attached or detached by the same procedure.

In the structure of the contraction pads 7a to 7c, the wind speed becomes as high as 30 to 50 m / s at the tip of the blowing nozzle to receive the wind pressure. In addition to being a prerequisite for having rigidity, it must be lightweight because it can be easily held by human hands and is convenient to attach and detach. Further, since the shape has a curved portion, workability is good, and it is necessary to be economical and producible.

FIG. 3 shows a contraction pad having a detachable lightweight panel structure which meets the above conditions. The exterior (outer surface) is made of a thin aluminum material and the interior is filled with hard urethane injection foam. It has a structured structure. For this reason, it is light enough to be carried by human hands, and curved parts can be processed arbitrarily, and the urethane inside adheres to the inner surface of the aluminum plate during injection foaming (great adhesion), and urethane is hard. Therefore, since it has sufficient strength against external force and rigidity against deformation, it is suitable as a contraction pad.

Instead of injecting and foaming the above urethane, a plurality of aluminum partition plates are put inside and welded to the exterior (outer surface material) to attach and reinforce to obtain strength and rigidity against external force. Even the contraction pad with a structure is lightweight and convenient to handle.

[0020]

According to the present invention, in the case of changing the blowing area of the air flow introduced into the test vehicle from the blowing nozzle of the environmental wind tunnel test device, in the case of changing the blowing area in the upward direction and the bilateral direction simultaneously, Since it can be realized with one blow nozzle and a small lightweight desorption type contraction pad without installing a device to replace it, the environmental wind tunnel can be made much smaller ( Installation space is reduced to about 1/3) and construction equipment costs can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a partial side view of an embodiment of the present invention.

FIG. 2 is a detailed view of a blowing nozzle.

FIG. 3 is a detailed view of a contraction pad.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wind tunnel part, 2 ... Wind tunnel blowing nozzle, 3 ... Test vehicle, 4 ... Rear deflector blades, 5 ... Wind tunnel suction duct, 6 ... Chassis roller,
7a to 7c ... Contraction pad, 8 ... Mounting bolt, 9 ... Handle.

Continuation of the front page (56) Bibliographic Reference Sho 58-134749 (JP, U) Actual 60-35242 (JP, U)

Claims (5)

(57) [Claims] 1. A environment wind the test apparatus including a blowing nozzle which is formed from the contraction plate of the upper and lower surfaces and both side surfaces, the position of the lower surface and both side contraction plate is fixed, the contraction flow plate of the upper surface this
Contraction plate and structure movable vertically in contraction flow plates of the sides about the hinge at the upstream end of, characterized by attaching the contraction pad detachable inside the contraction flow plate of the sides Environmental wind test equipment. 2. The apparatus according to claim 1, wherein the contraction pad is
Environmental wind and air test equipment, which is characterized by mounting the vertical direction in multiple stages . 3. An environmental wind test apparatus equipped with blowout nozzles formed of contraction plates on the upper and lower surfaces and both side surfaces, wherein the positions of the contraction plates on the upper and lower surfaces are fixed and the positions of the contraction plates on both sides are fixed. And a structure in which the contraction plates on both sides are movable to the left and right, and a removable contraction pad is attached to either the upper surface or the lower surface or inside the contraction plates on both sides. Wind test equipment. 4. In an environmental air blowing test device blowing nozzle formed from upper and lower surfaces and both side surfaces, the positions of the lower surface and the both side surfaces are fixed, and the upper surface of the contraction plate is compressed. Flow board
An outlet nozzle having a structure in which it can be moved up and down between the two contraction plates centering on a hinge at the upstream end of the contraction plate, and detachable contraction pads are attached to the inside of the contraction plates on both sides. 5. An environmental air blowing test device blowing nozzle, comprising upper and lower surfaces and both side surfaces, wherein the positions of the upper and lower contraction plates are fixed, and the contracted plates on both sides are moved to the left and right. A blowout nozzle having a movable structure, wherein a contraction pad is attached to the inside of the contraction plate on either or both of the upper surface and the lower surface.