Aircraft tail jet flow infrared suppression device and method based on synthetic jet flow

Abstract

The invention discloses an aircraft tail jet flow infrared suppression device based on synthetic jet flow, which comprises a synthetic jet flow exciter arranged on a spray pipe of an aircraft, the synthetic jet flow exciter comprises an air cylinder, a piston is arranged in the air cylinder, and an air inlet seam is arranged on the cylinder wall of the air cylinder; when the piston moves to a lower dead center position, the air inlet seam is communicated with the internal space of the cylinder, a jet pipe is arranged at the end of the cylinder, the piston is connected with a driving mechanism, and the driving mechanism can drive the piston to reciprocate in the cylinder; according to the device, through the arrangement of the gas inlet seam, the piston type synthetic jet exciter for feeding gas from the outside of the spray pipe is adopted, an infrared suppression scheme for enhancing jet mixing by synthetic jet is formed, and the problems that steady-state jet and pulse jet need to bleed gas, and the performance of the piston type synthetic jet exciter is reduced due to the fact that the piston type synthetic jet exciter sucks excessive high-temperature fuel gas are solved.

Description

technical field [0001] The invention belongs to the technical field of aircraft tail jet infrared suppression, and more particularly relates to a synthetic jet-based aircraft tail jet infrared suppression device and method. Background technique [0002] The infrared radiation of the aircraft's tail jet is considered as one of the three major radiation sources of the aircraft. Because of its wide detection range, suppressing its infrared radiation is a very important issue. The infrared radiation intensity of the tail jet mainly depends on the temperature, size and composition of the jet in the high temperature core region of the tail flame. It is one of the main methods to suppress the infrared radiation of the wake jet by strengthening the mixing of the aircraft tail jet with the ambient air flow. By greatly reducing the size of the jet core area, the static temperature of the jet core area is reduced, and H 2 O. CO 2 The concentration of the radioactive gas, and then ac...

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies in the prior art, to provide a synthetic jet-based aircraft tail jet infrared suppression device and method, the device adopts a piston-type air intake outside the nozzle through the setting of the air intake slot. Synthetic jet actuator, which forms a synthetic jet to strengthen the jet mixing infrared suppression scheme, solves the problem that the steady state jet and pulse jet need bleed air, and the performance of the piston type synthetic jet actuator sucks too much high-temperature gas and the performance declines

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