CN103101614A

CN103101614A - Noise suppression device of steady microjet weapon cabin

Info

Publication number: CN103101614A
Application number: CN2011103581614A
Authority: CN
Inventors: 冯强; 张洋; 崔晓春; 李玲
Original assignee: AVIC Shenyang Aerodynamics Research Institute
Current assignee: AVIC Shenyang Aerodynamics Research Institute
Priority date: 2011-11-14
Filing date: 2011-11-14
Publication date: 2013-05-15
Anticipated expiration: 2031-11-14
Also published as: CN103101614B

Abstract

The invention discloses a noise suppression device of a steady microjet weapon cabin. The noise suppression device comprises a steady microjet activator which comprises a chamber staying module and a jet orifice cover, wherein the jet orifice cover is provided with one row or two rows of microjet holes; the chamber staying module is internally provided with a first staying chamber and a second staying chamber which are communicated, the lower end surface of the chamber staying module is provided with an air inlet hole, and the periphery of a voltage-stabilizing gas outlet of the second staying chamber is provided with an indent closed-loop seal groove; the closed-loop seal groove is internally provided with a sealing ring, the shape and size of the jet orifice cover are matched with those of the voltage-stabilizing gas outlet, and the jet orifice cover is in sealing connection with the voltage-stabilizing gas outlet; and the two side bulge edges of the chamber staying module are fixed on the side wall of a model platform, and an air inlet of the lower end surface of the chamber staying module is connected with an air supply pipeline on the model platform. The noise suppression device provided by the invention has the advantages that the structure is simple, and noises of the weapon cabin can be effectively suppressed.

Description

A kind of noise suppression device of stationary micro jet weapon bay

Technical field

The present invention relates to a kind of noise suppressor of aircraft weapon-bay, specifically a kind of noise suppression device of stationary micro jet weapon bay.

Background technology

Military aircraft will be thrown in flight course/weapon delivery usually.The modern military fighter plane is generally inner at one or more weapon-bays with the weapon carry.Weapon-bay comprises a pair of hatch door usually, only opens when input/weapon delivery, within all the other flight time, the weapon-bay hatch door is in closed condition, to keep the smooth pneumatic profile of aircraft, improve the aircraft flight performance, as manoevreability, Stealth Fighter, low-resistance performance etc.

In state of flight, after weapon-bay is opened, between the inner low speed flow of weapon-bay and the outside high velocity air of weapon-bay, form the skim fluid, be called free shear layer.Free shear layer is unsettled, and section forms a large amount of whirlpool unity structures within it.The inner whirlpool of shear layer unity structure is after striding across the weapon-bay accent with shear layer, bump against with the weapon-bay rear wall, form high-intensity cavity resonance, thereby at the high-intensity aerodynamics noise of the inner formation of weapon-bay, this high-intensity aerodynamics noise is to aircraft, weapon-bay and firearm construction, and the weapon-bay inner electronic equipment all has destructive effect.

At present, the exiter of controlling for the weapon-bay noise is leading edge spoiler (Spoiler).The leading edge spoiler is a kind of flow control apparatus that stretches out weapon-bay, and its surface is higher than the weapon-bay accent.

Leading edge is arranged its obvious technological deficiency of existence of the flow control method of disturbing flow device:

1, owing to having destroyed the smooth aerodynamic configuration of aircraft, produce additional resistance;

2, spoiler need to stretch out weapon-bay after weapon-bay is opened, and needs complicated drive system, and increases structural weight;

3, work as flight Mach number MaAfter 1, control effect and sharply descend, even lost efficacy.

Summary of the invention

Purpose of the present invention is to provide a kind of noise suppression device of stationary micro jet weapon bay, introduces gas jet by permanent microjet exiter microjet hole to the weapon-bay of opening, and shear layer is applied excitation, reduces the high strength aerodynamics noise of opening weapon-bay.

The technical scheme that adopts is:

A kind of noise suppression device of stationary micro jet weapon bay comprises permanent microjet exiter, and permanent microjet exiter comprises stays room module and jet lid two parts;

Jet orifice covers and offers a row or two row microjet holes, and the microjet bore dia is 0.4 ~ 1.0mm, and the microjet hole length is 0.5 ~ 1 mm, and the microjet pitch-row is 1.5 mm from weapon-bay leading edge distance;

Staying has first of connection to stay chamber and second in the chamber in room module, stay on the lower surface of room module induction opening is arranged, the front end second of staying room module has the voltage stabilizing gas vent in the chamber, and the periphery of this voltage stabilizing gas vent has the closed loop seal groove of indent, is equiped with seal ring in this closed loop seal groove;

The shape of jet lid and size are complementary with stabilizing gas outlet, and the jet orifice cover buckle is located on the voltage stabilizing gas vent, and jet lid and voltage stabilizing gas vent are tightly connected;

The both sides nosing of staying room module is fixed on the sidewall of model platform, and the admission port on lower surface in the room module is connected with supply air line on model platform, and the upper flat plate of model platform is fixed on the sidewall of room module and model platform.

Principle of work of the present invention:

High pressure gas pass through supply air line, introduce voltage stabilizing and stay indoorly, at the uniform high pressure gas of mineralization pressure in the chamber interior, then high pressure gas enter flow field to be controlled by the microjet hole with the certain speed injection, shear layer is applied excitation, the weapon-bay noise is suppressed.

The invention has the advantages that:

1, in wider flight envelope scope, effectively reduce the weapon-bay aerodynamics noise;

2, provide noise suppression device for weapon bay for multiple aircraft;

3, exiter flushes installation with aircraft surface, does not destroy the smooth aerodynamic configuration of aircraft, thereby does not produce

Give birth to additional resistance;

4, exiter does not have movable part, and is simple in structure, good seal performance;

5, exiter is in flight Mach number MaStill have after 1 and control preferably effect;

6, exiter desired gas flow is little.

Description of drawings

Fig. 1 is the exciter structure schematic diagram.

Fig. 2 is the exiter decomposing schematic representation.

Fig. 3 is the exiter bottom schematic view.

Fig. 4 is exiter and model platform assembling schematic diagram.

The specific embodiment

A kind of noise suppression device of stationary micro jet weapon bay comprises permanent microjet exiter 1, and permanent microjet exiter 1 comprises stays room module 2 and jet lid 3;

The inner chamber of staying room module 2 has first of connection to stay chamber 4 and second in chamber 11, stay on the lower surface 5 of room module 2 induction opening 6 is arranged, stay second of room module 2 and in chamber 11, voltage stabilizing gas vent 7 is arranged, the periphery of voltage stabilizing gas vent 7 has the closed loop seal groove 8 of indent, be equiped with seal ring 9 in closed loop seal groove 8, the shape of jet lid 3 and size are complementary with voltage stabilizing gas vent 7, and jet lid 3 be located in voltage stabilizing gas vent 7 places, are tightly connected; Laterally offer two row microjet holes 10 on jet lid 3;

The both sides nosing of staying room module 2 is fixed on the sidewall of model platform 12 by flathead screw, induction opening 6 on the lower surface 5 of room module 2 is connected with the supply air line on model platform 12, and the leading edge upper flat plate 14 of model platform 12 is screwed on the sidewall of staying room module 2 and model platform 12.

The diameter in above-mentioned microjet hole 10 is 0.4,0.6mm or 1.0mm, and the microjet hole length is 1 mm, and microjet pitch-row weapon-bay 13 leading edges distances are 1.5 mm.

Claims

1. a noise suppression device of stationary micro jet weapon bay, comprise permanent microjet exiter (1), it is characterized in that: permanent microjet exiter comprises stays room module (2) and jet lid (3);

Staying has first of connection to stay chamber (4) and second in chamber (11) in room module (2), stay on the lower surface (5) of room module (2) induction opening (6) is arranged, stay second of room module (2) and in chamber (11), voltage stabilizing gas vent (7) is arranged, the periphery of voltage stabilizing gas vent (7) has the closed loop seal groove (8) of indent, be equiped with seal ring (9) in closed loop seal groove (8), the shape of jet lid (3) and size are complementary with voltage stabilizing gas vent (7), and jet lid (3) be located in voltage stabilizing gas vent (7) and locates, and is tightly connected; Laterally offer a row or two on jet lid (3) and arrange microjet hole (10).

2. a kind of noise suppression device of stationary micro jet weapon bay according to claim 1, the diameter that it is characterized in that above-mentioned microjet hole (10) is 0.4 ~ 1.0mm, the microjet hole length is 0.5 ~ 1 mm, and microjet pitch-row weapon-bay (13) leading edge distance is 1.5 mm.