CN202337358U

CN202337358U - Noise suppression device of stationary micro jet weapon bay

Info

Publication number: CN202337358U
Application number: CN201120447286XU
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: 2012-07-18
Anticipated expiration: 2021-11-14

Abstract

Disclosed is a noise suppression device of a stationary micro jet weapon bay, which comprises a stationary micro jet exciter which includes a plenum chamber module and a jet cover; one or two rows of micro jet holes are arranged on the jet cover. A first plenum chamber and a second plenum chamber which are communicated with each other are arranged in the plenum chamber, air inlet holes are arranged on the lower end face of the plenum chamber module, concaved closed ring type sealing grooves are arranged in the periphery of a steady pressure gas outlet of the second plenum chamber, sealing rings are arranged in the closed ring type sealing grooves, the shape and size of the jet cover match with the steady pressure gas outlet, and the jet cover is connected with the steady pressure gas outlet in a sealing mode; nosings on two sides of the plenum chamber module are fixed on side walls of a model platform, an air inlet arranged on the lower end face of the plenum chamber module is connected with an air supply pipeline on the model platform. The noise suppression device of a stationary micro jet weapon bay is simple in structure and capable of effectively preventing the noises in the weapon bay.

Description

A kind of permanent microjet weapon-bay Noise Suppression Device

Technical field

The utility model relates to a kind of noise suppressor of aircraft weapon-bay, specifically is a kind of permanent microjet weapon-bay Noise Suppression Device.

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 when input/weapon delivery, opens, in 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, like manoevreability, stealthy performance, low-resistance performance etc.

In state of flight, after weapon-bay is opened, between 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 portion 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 that is used for the weapon-bay noise control 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 tangible technological deficiency of existence of the flow control method of disturbing flow device:

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

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

3, work as flight Mach number Ma>After 1, the control effect sharply descends, even loses efficacy.

The utility model content

The purpose of the utility model; Provide a kind of permanent microjet weapon-bay Noise Suppression Device; Introduce gas jet through permanent microjet exiter microjet hole to the weapon-bay of opening, shear layer is applied excitation, reduce the high strength aerodynamics noise of opening weapon-bay.

The technical scheme that adopts is:

A kind of permanent microjet weapon-bay Noise Suppression Device comprises permanent microjet exiter, and permanent microjet exiter comprises stays room module and jet flap two parts;

Jet orifice covers and offers a row or two row's 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 the 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, in this closed loop seal groove, is equiped with seal ring;

The shape of jet flap is complementary with size and stabilizing gas outlet, and the jet flap be located on the voltage stabilizing gas vent, and jet flap and voltage stabilizing gas vent are tightly connected;

Two pleurapophysis of staying room module are along being fixed on the sidewall of model platform, and the admission port on the lower surface in the room module is connected with supply air line on the model platform, and the upper flat plate of model platform is fixed on the sidewall of room module and model platform.

The principle of work of the utility model:

High pressure gas pass through supply air line; Introduce voltage stabilizing in indoor, at the uniform high pressure gas of the pressure of formation in the chamber interior, high pressure gas spray with certain speed through the microjet hole and get into flow field to be controlled then; Shear layer is applied excitation, the weapon-bay noise is suppressed.

The advantage of the utility model is:

1, in the flight envelope scope of broad, effectively reduces the weapon-bay aerodynamics noise;

2, for multiple aircraft the weapon-bay Noise Suppression Device is provided;

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 Ma>Still have after 1 and control effect preferably;

6, exiter desired gas flow is little.

Description of drawings

Fig. 1 is the exciter structure scheme drawing.

Fig. 2 is the exiter decomposing schematic representation.

Fig. 3 is the exiter bottom schematic view.

Fig. 4 is exiter and model platform assembling scheme drawing.

The specific embodiment

A kind of permanent microjet weapon-bay Noise Suppression Device comprises permanent microjet exiter 1, and permanent microjet exiter 1 comprises stays room module 2 and jet flap 3;

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

Two pleurapophysis of staying room module 2 are along being fixed on the sidewall of model platform 12 through flathead screw; Induction opening 6 on the lower surface 5 of room module 2 is connected with the supply air line on the 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 distance is 1.5 mm.

Claims

1. a permanent microjet weapon-bay Noise Suppression Device comprises permanent microjet exiter (1), it is characterized in that: permanent microjet exiter comprises stays room module (2) and jet flap (3);

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

2. a kind of permanent microjet weapon-bay Noise Suppression Device 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.