Variable Mach number motion control device for hypersonic-speed variable Mach number wind tunnel nozzle

Abstract

The invention discloses a variable Mach number motion control device for a hypersonic-speed variable Mach number wind tunnel nozzle. The wind tunnel nozzle consists of a fixed curved panel, a rotating curved panel, and a wind tunnel nozzle air flow channel which is formed by the space formed by the enclosing of two side plates. The wind tunnel nozzle comprises an inlet, a shrinking segment, a throat channel, an extension segment, and an outlet. The inlet is connected with a heater, and the outlet is connected with a wind tunnel test cabin. The rear end of the rotating curved panel is fixed at the outlet of the wind tunnel nozzle. The variable Mach number of the wind tunnel nozzle is achieved through the rotation of the rotating curved panel around an outlet shaft. The motion control device comprises a drive system, a position monitoring system, and a supporting system, wherein the drive system, the position monitoring system and the supporting system are disposed at the shrinking segment. The drive system comprises an electric cylinder, a flange, a hinge, and a hinge seat. The flange is installed in the movement direction of the electric cylinder, and the flange is connected with the hinge. The hinge is connected with the hinge seat installed on the rotating curved panel. The position monitoring system comprises two displacement sensors, and the two displacement sensors are respectively disposed at left and right positions of the shrinking segment of the rotating curved panel. The supporting system comprises a pedestal and two door frame structures, wherein the two door frame structures are fixed on the pedestal.

Description

technical field [0001] The invention belongs to the technical field of hypersonic speed test wind tunnels, and in particular relates to a Mach number variable motion control device for a hypersonic variable Mach number wind tunnel nozzle. Background technique [0002] The hypersonic wind tunnel is an essential ground equipment for hypersonic technology research, and its function is to simulate the airflow environment during hypersonic flight. The hypersonic variable Mach number test wind tunnel is a hypersonic wind tunnel in which the Mach number of the experimental airflow at the outlet of the wind tunnel nozzle and other state parameters can be continuously changed according to the needs of the experiment during the experiment. Changing hypersonic airflow. [0003] At present, the existing variable Mach number wind tunnels at home and abroad are all supersonic low-enthalpy wind tunnels, and there is no hypersonic variable Mach number wind tunnel built yet. The key techno...

AI Technical Summary

Problems solved by technology

The key technology for building a hypersonic variable Mach number wind tunnel is to realize the variable Mach number of the hypersonic wind tunnel nozzle, and to be able to control it with large driving force, high precision, and complex motion

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