A measuring system and measuring method for a discharge resistance reducing device

Abstract

The invention relates to the technical field of aircraft aerodynamic resistance measurement, in particular to a measurement system and method for a discharge resistance reduction device, the system includes a discharge resistance reduction device, an aircraft model, an optical fiber balance, a bracket, an adjustment mechanism, an optical signal demodulator, The controller and fiber grating; the discharge resistance reduction equipment includes a discharge structure and a discharge device; the discharge structure is fixedly arranged on the head of the aircraft model and connected with the discharge device; the aircraft model is fixedly arranged on the head of the fiber optic balance; one end of the bracket is connected to the fiber optic balance It is fixedly connected, and the other end is fixedly connected with the adjustment mechanism; the adjustment mechanism can rotate with multiple degrees of freedom to adjust the pose of the bracket; the fiber grating is used to measure temperature changes; the optical signal demodulator is used to collect and demodulate optical signals; The device determines the discharge time according to the temperature change measured by the fiber grating, and determines the discharge drag reduction effect according to the multi-component load change measured by the fiber optic balance. The invention can directly measure the drag reduction effect of the discharge drag reduction equipment.

Description

technical field [0001] The invention relates to the technical field of aerodynamic resistance measurement of aircraft, in particular to a measurement system and measurement method of discharge drag reduction equipment. Background technique [0002] Hypersonic vehicle technology is a new commanding height in the field of aerospace in the 21st century. Hypersonic vehicles have the advantages of long flight distance and strong maneuverability, and are the development direction that the world focuses on today. In order to achieve hypersonic flight, the aerodynamic resistance of the aircraft must be reduced during flight. At present, the common drag reduction method is usually to set a shock needle on the head of the aircraft and change the shape of the shock wave by discharging to reduce the aerodynamic drag of the aircraft. However, the method of discharging drag reduction will generate strong electromagnetic interference and affect the sensor. Therefore, the effect of dischar...

AI Technical Summary

Problems solved by technology

At present, the common way of reducing drag is usually to install a shock needle on the head of the aircraft and change the shape of the shock wave by discharging to reduce the aerodynamic drag of the aircraft. However, the way of reducing drag by discharging will generate strong electromagnetic interference and affect the sensor. Therefore, the effect of discharge drag reduction can only be judged by numerical calculation methods such as CFD. At the same time, flow field display methods such as schlieren are used to analyze the drag reduction process, and there is no measurement method for drag reduction effect.

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