| 摘要 |
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. |
