JPS6060530A - Wind tunnel testing device - Google Patents

Abstract

PURPOSE:To conduct an efficient wind tunnel test by incorporating plural kinds of nozzle integrally in a structure which moves up and down, and left and right, and switching them according to a necessary wind speed parameter. CONSTITUTION:A hydraulic pressure generator 2 rotates a hydraulic motor 11 to rotate a screw 12 through a coupling 13, and a measured tunnel nozzle part 1 is moved up and down with the output of a nut 18 to select one of nozzles 6a-6c which coincides with a necessary wind speed parameter, e.g. 6b. Rough positioning is performed through a sensor 14 and a controller 15, a servo valve 4 is closed, and the hydraulic motor 11 is stopped. Then, the taper pin 16b of the nozzle part 1 is thrust into a support tunnel through a controller 3 and the servo valve 4 to align the nozzle center with the center of the air course of the wind tunnel testing device. When nozzles are switched, the taper pin 16b is extracted from the hydraulic cylinder 17b and the current nozzle is switched to another nozzle 6a or 6c as mentioned above. Therefore, a wind tunnel test with good efficiency is conducted.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is characterized in that the nozzle shape can be changed by switching the nozzle in order to set various wind speed parameters in a wind tunnel test device. be.

[Prior art]

Figure 1 shows an example of a blow-out type wind tunnel test device.

In the figure, (1) is the measuring barrel nozzle part, (3O) is the air storage tank, (31) is the shutoff valve, (32) is the pressure regulating valve, (33) is
is a collection cylinder, (34) is a model support cylinder, and (35) is a diffusion cylinder. The nozzle shape of the measurement barrel nozzle part (1) needs to match a predetermined wind speed parameter. In order to deal with this, conventionally, a flexible method in which the nozzle shape is changed according to a predetermined wind speed parameter using a hydraulic drive device and a control device, and a 1llll fixed-body nozzle section in which the nozzle shape is adjusted to a predetermined wind speed parameter are used. There were two methods: one was made one by one, and the measuring cylinder nozzle part was replaced depending on the wind speed to be tested.

Figure 2 shows a flexible system using a hydraulic drive device and a control device. (1) is the measurement cylinder nozzle part, (2) is the hydraulic pressure generator, (3) is the controller, (4) is the servo pulp, (5) is the
) is the hydraulic cylinder, (68x6b) is the nozzle, and (9) is the floor surface. This method uses the above nozzles (6a) and (6b).
) can be achieved with one device. For example, in order to change the shape of the high-speed nozzle (6a) in the direction of the arrow and change it to the low-speed nozzle shown by the broken line, the hydraulic pressure generator (2)
By controlling the opening degree of the servo valve (4) using the controller (3), the movement amount of the hydraulic cylinder (5) can be controlled. Therefore, the production cost increases enormously due to the large size of the hydraulic generator and the complexity of the control system, and strict calibration is required to reproduce the nozzle shape according to the required wind speed parameters, which reduces running costs. However, it has the drawback of incurring huge costs.

On the other hand, there is a method in which the nozzle shape is fixed, several types of measurement barrel nozzle sections are manufactured to match the required wind speed parameters, and the measurement barrel nozzle sections that match the wind speed parameters to be tested are used while being changed. In this case, as shown in Figure 3, the measuring cylinder nozzle part (1) is mounted on a trolley (7), moved on the floor (9) using the rail (8) as a guide, set in a predetermined position, and attached/detached. It is common to do so. Therefore, in terms of manufacturing costs, this method is much cheaper than the method using the above-mentioned hydraulic drive device and control device. However, when replacing the measurement cylinder nozzle part (1), it is necessary to remove, transport and store the measurement nozzle part (11) that has already been installed, and also to transport the replacement part.

It is necessary to set up the wind tunnel test, and the workability is very poor, and the wind tunnel test has to be stopped for a long time during the setup, resulting in inefficiency. This invention was also unfavorable from the viewpoint of safety when transporting and handling heavy objects. The present invention proposes a wind cylinder device that is integrated into a movable structure so that the nozzle of the measuring cylinder nozzle part can be easily replaced according to the required wind speed parameters.

[Embodiments of the invention]

Figures 4 and 5 show an embodiment of the present invention, in which a hydraulic motor, trapezoidal screw, and NAND are used to move the nozzle up and down, and an optical sensor is used to position the nozzle with the flow path of the wind tunnel. and a taper bottle. FIG. 4 is a view seen from the airflow direction, and FIG. 5 is a sectional view. (1
) to (41, !61 and (9) are the same as the above conventional device. aυ is a hydraulic motor, αδ is a hydraulic motor 0υ
(131 is the coupling between the hydraulic motor CLII and the trapezoidal screw width, α4 is the optical sensor, 09
is the damper of the optical sensor, αQ is the taper pin, and stand is the oil pressure of the tank that fits into the collecting tunnel (33) and model support cylinder (34) which are wind tunnel test equipment before and after the cylinder nozzle part (1), which measures the taper pin inclination. The cylinder α barrel is a nut that raises and lowers the measuring cylinder nozzle part (1) by rotating around a trapezoidal screw α. To match the nozzle shape to the flow path of the wind tunnel according to the required wind speed parameters, the hydraulic motor (1) is controlled by the hydraulic generator (2).
and turn the trapezoidal screw α connected via coupling 03.

The measuring cylinder nozzle part (1
) up and down. Assume that the nozzle (6) that meets the required wind speed parameter is (6b).

Rough positioning is performed using the optical sensor αa and controller a9, and a signal is transmitted to the hydraulic controller (3) to control the servo pulp (4).
By closing, the hydraulic motor 0υ is stopped.

Next, the measurement cylinder nozzle part (the barbin housed in 11)
16b) through the controller (3) and servo valve (4b), and pushed into the wind tunnel test equipment, collection cylinder (33) and model support cylinder (34) before and after the measurement cylinder nozzle part (1). Align the center of the nozzle with the center of the wind tunnel test equipment.

To prevent the flow from being turbulent due to unevenness in the air path, etc. 0 Furthermore, when changing the required wind speed parameter, move the tapered bin (46b) for positioning before and after the measuring cylinder nozzle part (1) using the hydraulic cylinder (t7b). A wind tunnel test is conducted by removing the wind tunnel apparatus and changing the nozzle shape to another nozzle (6a) or (6C) using the same method as above.

By the way, in the above explanation, the moving device uses hydraulic pressure.

In this example, an optical sensor is used to detect position 14, and the nozzle is moved up and down to obtain a nozzle shape that matches the wind speed parameters.
There is no problem even if the direction of movement of the measuring cylinder nozzle part is left or right.

Further, although the explanation was given at the beginning using an example of the configuration of a blow-out type wind tunnel test device, it goes without saying that the device of the measurement barrel nozzle part can be used in a suction-type or circulation-type wind tunnel test device.

〔Effect of the invention〕

In this way, by attaching multiple shapes of nozzles to one measurement cylinder nozzle part on a single support stand that can be moved up and down or left and right, it is possible to achieve efficient measurement at a low cost and by eliminating wasted time in replacing the measurement cylinder nozzle part. A wind tunnel device using a body nozzle part can be provided.

[Brief explanation of the drawing]

Figure 1 is a diagram showing an example of the configuration of a blow-out type wind tunnel test device, Figure 2 is a diagram showing a flexible measurement barrel nozzle section using a conventional hydraulic drive device and controller, and Figure 3 is a diagram showing a conventional multiple measurement system. Figures 4 and 5 are diagrams showing an embodiment of the present invention using a cylinder nozzle part. In Figure 1, (1) is a measuring cylinder nozzle part, and (2) is a hydraulic pressure generator. , (3) is a controller,
(4) is servo pulp, (5) is hydraulic cylinder, (6)
is the nozzle, (9) is the floor, aυ is the hydraulic motor, and a4 is the trapezoidal screw. 0 is a coupling, (14 is an optical sensor, α9 is a controller for the optical sensor, tsr is a taper pin, 0η is a hydraulic cylinder, and a cod is a nut. Note that the same reference numerals in Figure 9 indicate the same or equivalent parts. People Masuo Oiwa Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In a wind tunnel testing device, it is possible to set parameters related to various wind tunnels from low to high sonic velocities by changing the shape of the nozzle. Two or more nozzles are provided on one support base that can be moved vertically or horizontally so that the center of the air path coincides with the center of the air path, and the support base is moved to a predetermined position using a drive device according to a required wind speed parameter. A wind tunnel device characterized in that it is configured to switch nozzles accordingly.