Control device and control method for jet flow pressure and flow in wind tunnel experiment

Abstract

The invention discloses a control device and a control method for jet flow pressure and flow in a wind tunnel experiment. The control method comprises the following steps that: connecting and placingan orifice plate and a red copper pipe sleeve in sequence on the annular spacing position of a gas source inlet nut; screwing a gas source outlet nut into the gas source inlet nut, and in addition, pressing and connecting the orifice plate and the red copper pipe sleeve to the annular spacing position; enabling a red copper pipe to extend into the gas source outlet nut to be connected with the redcopper pipe sleeve; and enabling the other end of the red copper pipe to be connected with a ventilation pipeline in a tail supporting rod in a spray pipe system. By use of the control device for thejet flow pressure and flow, a detailed orifice calculation method is put forward, and a basis is provided for the accurate control of large-flow spray pipe plenum chamber pressure. By use of the control method for the jet flow pressure and flow, a whole set of plenum chamber pressure debugging method of large-flow jet flow is given, and the ground debugging success of the type of jet flow is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to a jet flow pressure and flow control device and control method in wind tunnel tests. Background technique [0002] Jet flow research is a very important test task in the wind tunnel, including lateral jet flow research for aircraft attitude control, interstage separation of aircraft and booster stage separation, development of tail jet flow for propulsion systems, etc., each These items are all related to the operation stability and control safety, and directly determine whether the design of the aircraft is successful. However, the numerical simulation of the jet flow cannot reflect the real state in many details, so the wind tunnel test is a necessary link in the process of establishing the aircraft database. [0003] However, when the jet flow test is carried out in the wind tunnel, the air source of the jet flow is limited, and some tests cannot be carr...

AI Technical Summary

Problems solved by technology

[0003] However, when the jet flow test is carried out in the wind tunnel, the air source of the jet flow is limited, and some tests cannot be carried out smoothly, which includes two meanings: first, the pressure of the high-pressure air source is limited, and it cannot be pressurized after reaching the upper limit; Yes, the flow rate of the gas source is limited. When the outlet of the nozzle is large, the flow loss of the pipeline is relatively large, and the chamber pressure of the nozzle cannot accumulate to the theoretical value.

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