A double outlet s-curved nozzle with low infrared radiation signal and its control method

Abstract

The invention discloses a double-outlet S-shaped spraying pipe capable of reducing infrared radiation signals. The double-outlet S-shaped spraying pipe comprises an air feeding and shunting section, wherein an outlet of the air feeding and shunting section is divided into two parts and is a symmetrical structure; the air feeding and shunting section is successively connected with S-shaped circular-torque-shaped rectangular sections, air film cooling rectangular exhaust sections, rectangular converging sections and rectangular expansion sections respectively; the side wall of the inner side of each air film cooling rectangular exhaust section is connection with a cold air chamber; air film holes in dislocation arrangement are formed in a connection wall side between each air film cooling rectangular exhaust section and each cold air chamber. The invention also discloses a control method of the double-outlet S-shaped spraying pipe. Through the spraying pipe and the control method, a detector is incapable of directly detecting high-temperature components behind an engine turbine; the infrared radiation emitted by high-temperature components at the upstream of the spraying pipe can be shielded to a maximum extent; meanwhile, the temperature of the wall side of the spraying pipe can also be reduced, so that the infrared radiation signals of the exhaust spraying pipe can be greatly reduced, and the exhaust performance is improved.

Description

technical field [0001] The invention belongs to the technical field of engine exhaust system design and infrared suppression, and specifically refers to a double-exit S-bend nozzle with low infrared radiation signals and a control method thereof. Background technique [0002] Since the mid-1980s, the importance of infrared stealth has become increasingly prominent. On the one hand, the detectors currently in use are mainly aimed at infrared signals, and on the other hand, infrared-guided missiles are the main threat to aircraft in air-to-air combat. Since the advent of the first infrared-guided missile, the American Sidewinder missile, in 1948, infrared guidance technology has been widely used and developed rapidly. The threat to the aircraft is becoming more and more serious, and the requirements for infrared stealth are getting higher and higher. [0003] The infrared radiation source of the aircraft is mainly concentrated in the rear hemisphere, which is the focus of inf...

AI Technical Summary

Problems solved by technology

[0003] The infrared radiation source of the aircraft is mainly concentrated in the rear hemisphere, which is the focus of infrared stealth, and under the condition that the current infrared stealth technology is fully utilized, it is entirely possible to reduce the infrared radiation intensity of combat aircraft by about 90%

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