A Noise Suppression Device for Weapon Compartment Based on Ambient Gas Jet Flow

Abstract

The invention discloses a weapon bay noise suppression device based on environment gas jet. The weapon bay noise suppression device is installed at an opening of a weapon bay (11) and comprises a plenum chamber (2) which is connected along an airflow direction and is provided with a small opening and a large cavity, and a jet flow opening cover (4) provided with a jet flow outlet (6), wherein the jet flow outlet (6) with long and thin rectangular cross section is positioned at the front edge of the weapon bay (11). The weapon bay noise suppression device is installed inside the weapon bay, environment gas is utilized as an air source, the intensity of noise in the bay when the weapon bay is started is reduced by spraying gas flow to the opening of the weapon bay, the aerodynamic configuration of an aircraft cannot be damaged, also high-pressure air source does not need to be additionally supplied, the service life is long, and stable and reliable effects are achieved.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a weapon compartment noise suppression device based on ambient gas jet flow. Background technique [0002] Modern military fighters generally use weapons bays to carry weapons. This is because when the fighters are in the state of takeoff / landing, cruise, etc., the door of the weapons bay is closed. This method of carrying weapons can effectively improve the flight performance of fighters, such as improving stealth. capability, enhanced maneuverability, reduced flight resistance, etc. [0003] When the fighter plane launches or drops weapons, the hatch of the weapon compartment is open. Due to the high flow rate of the ambient gas and the low flow rate of the gas in the weapon compartment, a transition layer will be formed in the opening area of ​​the weapon compartment between gases with different flow rates. The gas is called the shear layer. When the shear layer hits the ...

AI Technical Summary

Problems solved by technology

The high-intensity noise environment not only has a destructive effect on the weapon compartment system, such as causing the failure of the electronic control equipment in the compartment, fatigue of the bulkhead structure, etc., but also increases the maintenance cost of the fighter

[0004] At present, the noise suppression devices used in aircraft weapon compartments mainly include leading edge spoilers and micro-hole jets. The disadvantage of the former is that the spoilers destroy the shape of the aircraft, increase flight resistance, and its scope of application is small. Under the condition of supersonic flight, the noise reduction ability of the device is significantly reduced or even fails; the disadvantage of the latter is that the micro-hole jet requires an additional high-pressure air supply, which is not only inconvenient to carry, but also the flow rate of the jet outlet is affected by the air source. Resulting in limited usage time of the noise reduction device

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