JP3836058B2 - Wind tunnel test equipment for running model - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is applied to a wind tunnel test or the like for detecting an exhaust gas diffusion state of an automobile, and a traveling model such as an automobile model is caused to travel in a wind passage in the wind tunnel, and a diffusion state of a gas flow accompanying the traveling of the traveling model is determined. The present invention relates to a wind tunnel test apparatus for a traveling model to be detected.
[0002]
[Prior art]
When a vehicle travels on a digging road, there is a tendency that the exhaust gas leaks out from the opening of the digging road and diffuses to the surroundings due to interference between the exhaust gas discharged from the car and external air.
In order to detect the diffusion state of the exhaust gas, a wind tunnel test is performed in which the automobile model is run against the air flow in the wind channel in the wind tunnel and the diffusion state of the exhaust gas flow accompanying the running of the automobile model is detected. Yes.
[0003]
A utility model No. 2505618 has been proposed as one of wind tunnel testing apparatuses for automobile exhaust gas diffusion using such an automobile model.
In this device, in order to investigate the state of automobile exhaust gas diffusion from the digging road, a part of the runway is extended outward from the wind tunnel wall, and a U-turn part is provided at the upper part of the wind tunnel. In the wind tunnel test apparatus provided with a duct for shielding against the outside air, fresh air is supplied from the upstream wind path of the horizontal simulated excavation road whose central portion communicates with the wind tunnel wind path, and the inside of the downstream wind path The residual gas is discharged.
[0004]
[Problems to be solved by the invention]
In the wind tunnel testing apparatus for automobile exhaust gas diffusion as described above, the vehicle model is driven between the wind path walls of the wind tunnel by the traveling device, and the air flow flowing in the longitudinal direction of the wind tunnel is used by a turntable or the like. It is necessary to detect the state of exhaust gas diffusion by rotating the automobile model.
However, in the utility model No. 2505618, although the U-turn portion of the gas in the wind passage is provided in the upper portion of the wind tunnel wind passage, fresh air is supplied from the upstream wind passage of the simulated excavation road, and the downstream wind Since it is configured to discharge the residual gas into the road, a part of the remaining portion in the downstream air passage of the gas containing the fresh air brought into the road end in the traveling direction of the automobile exhaust gas is downstream of the air passage. It is easy to generate a phenomenon that it is transported again to the opposite road edge on the model without being discharged. For this reason, in such a conventional technique, it is difficult to control the gas flow by rotating the model while the automobile model is driven by the traveling device.
And so on.
[0005]
In view of the problems of the prior art, the present invention avoids the occurrence of recirculation of brought-in gas from the road end to the road end in the direction of travel of the travel model driven by the travel device, and travels the travel model by the travel device. An object of the present invention is to provide a wind tunnel test device for a traveling model that enables the gas flow to be easily controlled by rotating the model while improving the test accuracy and the test efficiency.
[0006]
[Means for Solving the Problems]
In order to solve such a problem, the present invention provides a traveling model such as an automobile model that travels in a wind path in a wind tunnel and detects a diffusion state of a gas flow accompanying the traveling of the traveling model. In a wind tunnel test device for a travel model, a travel device that reciprocates the travel model in an inclined direction including a direction perpendicular to the air flow in the wind path, and is disposed at a fixed height position from the floor surface of the wind tunnel. A shielding member made of a ground surface model installed corresponding to the traveling of the traveling model, wherein the wind tunnel is formed on the upper side of the shielding member, and the forward air path on which the traveling model travels and the lower side of the shielding member A return air passage formed independently of the forward air passage, and the lower side after the exhaust gas of the traveling model brought to one side of the road end in the traveling direction of the traveling model is flowed to the other side. In the return air passage formed in Suggest wind tunnel test apparatus of the running model, characterized in that it is configured to be induced.
[0007]
[0008]
The inventions according to claims 2 to 5 relate to a specific configuration of the traveling device, and the invention according to claim 2 relates to the first aspect, wherein the traveling device is installed between a pair of rotationally driven pulleys and the pulleys. And a belt type traveling device provided with a plurality of belts to which the traveling models are attached at predetermined intervals, and a plurality of the belt type traveling devices are arranged in parallel with each other in the direction of the air flow. It is characterized by.
[0009]
In claim 2 , preferably, as in claim 3 , one of the rotation shafts of the pair of pulleys is connected to a drive source such as an electric motor, and a gear fixed from the drive source to each of the rotation shafts. It is preferable that the pair of pulleys be driven to rotate synchronously via an intermediate gear.
[0010]
According to a fourth aspect of the present invention, there is provided a belt-type traveling device according to the first aspect, wherein the traveling device includes a pair of pulleys that are rotationally driven, and a belt that is installed between the pulleys and a plurality of the traveling models are attached at predetermined intervals. The belt-type traveling device is arranged in parallel so that a plurality of sets are interlocked with each other with the axis of the pulley being horizontal, and the traveling model is driven by the belt-type traveling device to travel in a vertical plane. It is characterized by comprising.
[0011]
In claim 4 , preferably, as in claim 5 , the belt-type traveling device is provided with a plurality of sets having different pulley diameters.
[0012]
According to the invention, the exhaust gas of the traveling model brought into the road end in the traveling direction by the traveling wind of the traveling model traveling on the traveling surface in the wind path of the wind tunnel is caused by the traveling wind and return wind of the traveling device. Since the road is provided independently at different parts across the shielding member made of the ground surface model, the gas flowing through the forward air path is provided independently at a part different from the forward air path. It is guided to the return air passage and diffused from the return air passage into the wind tunnel.
[0013]
As a result, the exhaust gas brought into the forward air passage by the traveling wind of the traveling model can be quickly diffused from the return air passage into the air passage of the wind tunnel, and the exhaust gas is circulated on the traveling surface. It is possible to avoid the coming, and to easily perform the wind tunnel test by rotating the traveling model and controlling the gas flow while the traveling model is traveling by the traveling device, and it is possible to improve the test accuracy of the wind tunnel test. The efficiency of wind tunnel testing can be improved.
[0014]
According to the second aspect of the present invention, since the plurality of sets of belt-type traveling devices are arranged in parallel with each other in the direction of the air flow, the traveling device is configured. Generation of a U-turn flow on the traveling surface due to the opposite direction inducing action is avoided, and diffusion of exhaust gas brought into the forward air passage by the traveling wind is promoted.
[0015]
According to the fourth and fifth aspects, the traveling model is driven by the belt-type traveling device and travels in a vertical plane, and the forward air path and the return air path of the traveling device are in the vertical plane. Since it can be divided into upper and lower parts, the exhaust gas brought into the forward air passage on the ground surface side can be easily diffused into the air passage of the return air passage below the ground surface on which the lower belt is traveling.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.
[0017]
FIG. 1 is a front view of a traveling model wind tunnel testing apparatus according to a first embodiment of the present invention (a view taken along the line BB in FIG. 2), and FIG. 2 is a view taken along an arrow A in FIG. FIG. 3 is a front view of a belt-type traveling device according to a second embodiment of the present invention, FIG. 4 is a front view of the wind tunnel testing device according to the second embodiment, and FIG.
[0018]
1 and 2 showing the first embodiment of the present invention, 100 is a wind tunnel, 101 is a wind tunnel floor, and 105 is a wind tunnel wall. Reference numeral 102 denotes a turntable installed in the wind tunnel 100, which can be rotated by a rotating device (not shown).
The turntable 102 includes two sets of first belt-type traveling device 001 and second belt-type traveling device 002 in the direction of the wind (air flow) flowing in the wind tunnel 100 (a plurality of sets may be used). It is installed side by side.
[0019]
In the first belt-type traveling device 001, reference numeral 2 denotes a first rotating shaft that stands upright in a pair in the wind tunnel 100, and the first rotating shaft is disposed at the upper end of each first rotating shaft. The 1st pulley 10 is attached so that rotation with 2 is possible. Reference numeral 12 denotes a first belt installed between the paired first pulleys 10. A plurality of automobile models 5 are fixed to the first belt 12 at predetermined intervals, and the inside of the wind tunnel 100 is moved according to the movement of the belt 12. Is reciprocated in an inclined direction including a direction perpendicular to the wind (air flow).
An output end of the electric motor 1 is connected to one of the first rotating shafts 1 and a first gear 6 is fixed to an intermediate portion.
[0020]
In the second belt-type traveling device 002, reference numeral 3 denotes a second rotating shaft that stands upright in a pair in the wind tunnel 100, and the upper end of each second rotating shaft 3 has a second rotating shaft. The 2nd pulley 11 is attached so that rotation with the 2 rotating shaft 3 is possible. Reference numeral 13 denotes a second belt installed between the paired second pulleys 11. A plurality of automobile models 5 are fixed to the belt 13 at a predetermined interval, and the wind tunnel 100 moves in the wind tunnel 100 as the belt 13 moves. It travels back and forth in an inclined direction including a direction perpendicular to (air flow).
A second gear 7 is fixed to one intermediate portion of the second rotating shaft 2. An intermediate gear 14 is rotatably supported by a stationary member (not shown) in the wind tunnel 100 and meshes with the first gear 6 of the first rotating shaft 2 and the second gear 7 of the second rotating shaft 3.
[0021]
Reference numeral 4 denotes a ground surface partition installed in a substantially horizontal direction in the upper space of the first gear 6 and the second gear 7 in the wind tunnel 100, and the upper surface side has a shape simulating the traveling path of the automobile model if necessary. Formed. By providing such a ground surface partition 4, the inside of the wind tunnel 100 is partitioned into two air passages, an upper air passage 103 and a lower air passage 104, and the inside of the upper air passage 103 is fixed to the belts 12 and 13. A plurality of automobile models 5 are allowed to travel.
[0022]
In the wind tunnel test device for a traveling model having such a configuration, the first rotating shaft 2 is rotationally driven by the electric motor 1, and the second gear 7 and the second rotating shaft 3 are illustrated via the first gear 6 and the intermediate gear 14. It can be rotated in the same direction as the first rotating shaft 2 as indicated by the arrow. The first pulley 10 attached to the first rotating shaft 2 and the second pulley 11 attached to the second rotating shaft 3 rotate in the same direction by the rotation of the first rotating shaft 2 and the second rotating shaft 3. As shown in FIG. 2, the first belt 12 installed between the first pulleys 10 and the second belt 13 installed between the second pulleys 11 are moved in the same direction as shown by arrows in the figure.
[0023]
As a result, a plurality of vehicle models 5 fixed to the first belt 12 and the second belt 13 at predetermined intervals, respectively, are formed above the ground surface partition 4 installed almost horizontally in the wind tunnel 100. The direction of the inclination angle including the perpendicular direction set by the turntable 102 with respect to the wind (air flow) in the wind tunnel 100 as the first belt 12 and the second belt 13 move in the upper air passage 103. To make a round trip.
[0024]
At the time of the wind tunnel test of the traveling model, the upper air passage (forward air passage) 103 and the lower air passage (return air passage) 104 in which the automobile model 5 is traveling are divided into the ground surface partition (shielding member) 4. Are separately formed in the vertical direction in the wind tunnel 100, so that the traveling wind of the automobile model 5 traveling on the ground surface partition 4 in the upper air path 103 causes the road direction end of the road, that is, the wind tunnel wall 105. The exhaust gas of the automobile model 5 brought to one side flows through the upper air passage 103 to the other side of the wind tunnel wall 105, and then is guided to the lower air passage 104, and from the lower air passage 104. It is diffused in the wind tunnel 100.
[0025]
Therefore, the exhaust gas brought into the upper air passage 103 (forward air passage) by the traveling wind of the automobile model 5 can be quickly diffused into the wind tunnel 100 from the lower air passage 104 (return air passage), It is avoided that the exhaust gas circulates on the running surface, that is, the ground surface partition 4. Thus, the wind tunnel test can be easily performed by controlling the gas flow by rotating the vehicle model 5 while the vehicle model 5 is driven by the belt-type traveling devices 001 and 002 (traveling devices).
[0026]
In addition, since the belt-type traveling devices 001 and 002 are arranged in parallel in a mutually linked manner in the direction of the wind (air flow) in the wind tunnel 100, traveling by the paired belt-type traveling devices 001 and 002 is performed. The U-turn flow is prevented from being generated on the traveling surface, that is, the ground surface partition 4 by the reverse direction guiding action of the wind. As a result, exhaust gas brought into the upper air passage 103 (forward air passage) is smoothly guided to the lower air passage 104, and diffusion into the wind tunnel 100 is promoted.
[0027]
In the second embodiment shown in FIGS. 3 to 5, two sets of belt-type traveling devices 003 and 004 having different pulley diameters are combined into large pulleys 21 a and 21 b and small pulleys that form pairs of the respective belt-type traveling devices 003 and 004. The rotational axis centers of 22a and 22b are horizontally arranged in parallel with each other, and the vehicle model 5 driven by the belt type traveling device is configured to travel in a vertical plane.
[0028]
That is, in FIGS. 3 to 5, 003 is a large-diameter belt-type traveling device, 004 is the small-diameter belt-type traveling device, and the large-diameter belt-type traveling device 003 and the small-diameter belt-type traveling device 004 are: A small-diameter belt-type traveling device 004 is arranged above the large-diameter belt-type traveling device 003 as shown in FIG. 3, and is arranged in parallel in the horizontal direction as shown in FIG.
The shafts of the rotary shafts 31a and 31b of the large-diameter belt-type travel device 003 and the shaft centers of the rotary shafts 32a and 32b of the small-diameter belt-type travel device 004 are horizontally installed. , 004, and the vehicle model 5 driven to travel travels in the vertical plane.
[0029]
Further, one end of the rotary shaft 31a of the large-diameter belt-type traveling device 003 is connected to the electric motor 1 similar to that of the first embodiment shown in FIG. This is transmitted to the rotary shaft 31a of the device 003 to drive the large-diameter belt-type travel device 003, and further, the gear 25 fixed to the rotary shaft 31a of the large-diameter belt-type travel device 003 and the small-diameter belt-type travel device. The belt-type traveling device 004 having a small diameter is driven by meshing with the gear 26 fixed to the device 004.
[0030]
In the second embodiment, the automobile model 5 is driven by the large-diameter belt-type traveling device 003 and the small-diameter belt-type traveling device 004 and travels in a vertical plane. The return air path can be divided into upper and lower parts in the vertical plane.
As a result, the exhaust gas brought into the forward air path on the ground surface side where the automobile model 5 travels is the air path of the return air path below the ground surface where the lower belts of the belt-type traveling devices 003 and 004 are traveling. Can easily diffuse into.
[0031]
【The invention's effect】
As described above, according to the present invention, the forward air path and the return air path of the traveling device are provided independently at different sites across the shielding member made of the ground surface model. The flowing gas is easily guided to the return air passage, and can quickly diffuse into the air passage of the wind tunnel from the return air passage.
As a result, the exhaust gas is prevented from circulating on the traveling surface, and it is possible to easily perform a wind tunnel test by controlling the gas flow by rotating the traveling model while the traveling model is traveling by the traveling device. Thus, the test accuracy of the wind tunnel test can be improved, and the efficiency of the wind tunnel test can be improved.
[0032]
According to the second aspect of the present invention, it is avoided that a U-turn flow is generated on the traveling surface due to the opposite direction guiding action of the traveling wind by the plurality of belt-type traveling devices. Diffusion of introduced exhaust gas is promoted.
According to the fourth and fifth aspects, the traveling model is driven by the belt-type traveling device and travels in the vertical plane, so that the forward air path and the return air path of the traveling device are vertically moved in the vertical plane. Thus, the exhaust gas brought into the forward air passage on the ground surface side can be easily diffused into the air passage of the return air passage below the ground surface on which the lower belt is traveling.
[Brief description of the drawings]
FIG. 1 is a front view of a traveling model wind tunnel testing apparatus according to a first embodiment of the present invention (a view taken along the line BB in FIG. 2).
FIG. 2 is a view taken in the direction of arrow A in FIG.
FIG. 3 is a front configuration diagram of a belt-type traveling device according to a second embodiment of the present invention.
4 is a view taken in the direction of arrow C in FIG. 3;
FIG. 5 is a front configuration diagram of a wind tunnel testing apparatus according to a second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electric motor 2 1st rotating shaft 3 2nd rotating shaft 4 Ground surface partition 5 Automobile model 6 1st gear 7 2nd gear 10 1st pulley 11 2nd pulley 12 1st belt 13 2nd belt 14 Intermediate gear 21a, 21b Large pulleys 22a, 22b Small pulleys 31a, 31b Rotating shafts 32a, 32b Rotating shafts 100 Wind tunnel 101 Wind tunnel floor 102 Turntable 103 Upper air passage 104 Lower air passage 105 Air passage wall 001 First belt type traveling device 002 Second Belt type travel device 003 Large diameter belt type travel device 004 Small diameter belt type travel device

Claims (5)

In a wind tunnel test apparatus for a traveling model that travels a traveling model such as an automobile model in a wind passage in a wind tunnel and detects a diffusion state of a gas flow accompanying traveling of the traveling model,
A traveling device that reciprocates the traveling model in an inclined direction including a direction perpendicular to the air flow in the air passage, and is disposed at a fixed height position from the floor surface of the wind tunnel to correspond to the traveling of the traveling model. A shield member made of a ground surface model installed, and the wind tunnel is formed on the upper side of the shield member, and the forward wind path on which the traveling model travels is independent of the forward wind path below the shield member. A return air passage formed on the lower side after the exhaust gas of the travel model brought into one side of the road end in the travel direction of the travel model is flowed to the other side. A wind tunnel test apparatus for a traveling model, characterized by being guided by The travel device comprises a belt-type travel device including a pair of pulleys that are rotationally driven and a belt that is installed between the pulleys and that has a plurality of travel models attached at predetermined intervals. The wind tunnel test apparatus for a traveling model according to claim 1 , wherein a plurality of sets are arranged in parallel with each other in the direction of air flow . One of the rotation shafts of the pair of pulleys is connected to a drive source such as an electric motor, and the pair of pulleys are rotated synchronously from the drive source via a gear and an intermediate gear fixed to each of the rotation shafts. The wind tunnel test device for a traveling model according to claim 2, wherein the wind tunnel test device is configured to be driven . The traveling device comprises a belt-type traveling device comprising a pair of pulleys that are rotationally driven and a belt that is installed between the pulleys and that has a plurality of traveling models attached thereto at a predetermined interval. A plurality of sets are arranged side by side in parallel with each other, and the traveling model is driven by the belt-type traveling device to travel in a vertical plane. A wind tunnel test apparatus for a traveling model according to 1. 5. The traveling model wind tunnel testing apparatus according to claim 4, wherein the belt-type traveling device includes a plurality of sets having different pulley diameters .

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