A fast switching valve device and its opening method for wind tunnel application

Abstract

The invention discloses a fast switching valve device for wind tunnel application and an opening method thereof, and belongs to the technical field of wind tunnel experiments. The fast switching valvedevice is characterized in that: a pneumatic control cone valve is coaxially arranged at an air storage section of a supersonic static wind tunnel and an inlet of a spray pipe, so that a movable conecenter is arranged between a valve core base and a tapered section of the inlet of the spray pipe, a pneumatic actuator is arranged outside the supersonic static wind tunnel, the pneumatic actuator is connected with the pneumatic control cone valve through a static hollow valve rod, a chain transmission structure is arranged in the static hollow valve rod, the quick translational motion of an actuating element in the pneumatic actuator is converted into the reciprocating motion of the movable cone center in the pneumatic control cone valve, and the quick start-stop operation of the supersonicstatic wind tunnel is realized. The fast switching valve device of the invention ensures the opening and closing speed of the valve, has simple structure and low manufacturing cost, and has good adaptability to wind tunnels with different calibers.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel experiments, and more specifically relates to a fast switching valve device and an opening method for wind tunnel applications. Background technique [0002] Boundary layer transition is a very complicated dynamical process. Although the research in this area has been widely concerned for a long time, the in-depth understanding is still not enough. The linear stability theory of its preliminary results can only be limited to the small disturbance environment. There is still a long way to go to achieve effective utilization. At present, for model development, what we can do is to use the combination of flight test, numerical calculation and wind tunnel test to propose some data as the preliminary basis for aircraft design. The most important part of the wind tunnel experiment is that the biggest difficulty is that the incoming flow inevitably has noise radiation interference, so that the turni...

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a fast switch valve device and its opening method for wind tunnel applications. Solve the problems that the valve opening response speed is slow relative to the overall test time during the start-up process of the hypersonic static wind tunnel test, and the wind tunnel cannot be opened and closed repeatedly

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