Noise suppression device of high frequency pulse jet weapon cabin

Abstract

Provided is a noise suppression device of a high frequency pulse jet weapon cabin. The noise suppression device of the high frequency pulse jet weapon cabin comprises a standing room module, sprayer pipe components, and resonance cavity components. Air inlet holes are formed in the bottom wall of the standing room module. A square cavity type pressure stabilizing chamber is arranged in the standing room module, a platform which is concave inward is arranged at the rear portion of the pressure stabilizing chamber in the standing room module, and the sprayer pipe components and the resonance cavity components are fixedly arranged on the platform. A plurality of resonance pipes which respectively corresponds to a plurality of sprayer pipes on the sprayer pipe components are arranged on the resonance cavity components. Each sprayer pipe and the corresponding sprayer pipe are on the same axis. The space distance between the sprayer pipe components and the resonance cavity components is X= 4-12 mm. The noise suppression device of the high frequency pulse jet weapon cabin has the advantages that a driver and an aircraft are arranged with parallel surface, smooth aerodynamic shape of the aircraft is not destroyed, and thus additional resistance is not produced; no movable parts are arranged on the driver; and the driver still has good control effect after the flight March number Ma 1.

Description

technical field [0001] The invention relates to a noise suppression device, in particular to a noise suppression device for a high-frequency pulse jet weapon cabin. The invention is related to the reduction of the aerodynamic noise level of the opened weapon compartment of the aircraft. The exciter introduces high-frequency pulsed jet flow into the opened weapon compartment, applies excitation to the shear layer, and reduces the high-intensity aerodynamic noise of the opened weapon compartment. Background technique [0002] Military aircraft typically drop / fire weapons while in flight. Modern military fighter jets generally carry weapons inside one or more weapon bays. The weapon compartment usually contains a pair of hatches, which are only opened when the weapon is dropped / launched. During the rest of the flight time, the hatch of the weapon compartment is closed to maintain the smooth aerodynamic profile of the aircraft and improve the flight performance of the aircr...

AI Technical Summary

Problems solved by technology

[0005] 1. Due to the destruction of the smooth aerodynamic shape of the aircraft, additional resistance is generated;

[0006] 2. The spoiler needs to protrude out of the weapon compartment after the weapon compartment is opened, which requires a complex drive system and increases the structural weight;

[0007] 3. When the flight Mach number Ma >1, the control effect drops sharply, or even fails

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