| 摘要 |
PROBLEM TO BE SOLVED: To make a supersonic nozzle a variable nozzle in a supersonic variable nozzle system and to obtain a continuous fine Mach number at the outlet of the nozzle. SOLUTION: A variable speed nozzle is arranged so that the upper and lower nozzle wall surfaces 8a and 8b thereof come into contact with both side walls 7a and 7b to be made movable up and down. The upper and lower nozzle wall surfaces 8a and 8b are respectively connected to three hydraulic cylinders 9a-9f, and the cross-sectional shape of the nozzle is changed by driving the cylinders. A computer 4 inputs the signal of a pressure sensor and calculates the shape of the variable speed nozzle by flow calculation so as to obtain a desired Mach number, and the respective hydraulic cylinders 9a-9f are controlled through a cylinder drive control unit 3 and the shape of the nozzle is changed to obtain a desired Mach number.
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