CN103437911A - Partition-bearing fluid control binary vector nozzle tube and vector thrust generation and control method thereof - Google Patents

Abstract

The invention relates to a fluid-controlled binary vector nozzle with a partition for an aero-engine or a mobile missile, which includes a nozzle body, and the inner flow path of the nozzle body includes a converging section in front of the throat and a rear of the throat connected in sequence. expansion segment. A partition is installed in the expansion section, and the transverse wall of the nozzle behind the partition is provided with holes/slits for introducing high-pressure gas, and the transverse wall of the nozzle is provided with a groove for hiding the convex plate of the partition, and the partition can be wound around The installation shaft rotates freely, and the partition plate and the inner wall of the nozzle wall form a pressure cavity, which controls the pressure of the introduced high-pressure gas, and then controls the pressure of the gas in the pressure cavity, and then controls the rotation of the partition, and finally makes the main flow deflect. Realize the vector thrust; while the present invention realizes the vector thrust, the vector efficiency is higher than that of the common fluid control method to realize the vector thrust.

Description

Fluid control binary vector nozzle with baffle and its vector thrust generation and control method

technical field

The invention relates to a binary vector nozzle with a partition plate for fluid control and its vector thrust generation and control method, which is mainly applied to all propulsion systems requiring vector thrust such as thrust vector aeroengines and mobile missiles.

Background technique

With the development of science and technology, the demand for thrust vectoring of aeroengines is increasing. How to effectively realize the vector thrust is a research hotspot in various countries. Compared with the traditional mechanical nozzle, the fluid control method has the advantages of simple structure and light weight. However, the general fluid control method realizes the thrust vector, and the nozzle needs to introduce 2.5% % of the mainstream flow of bleed air (usually from the compressor bleed air), changing the direction of the mainstream injection, its vector efficiency (vector angle / percentage of bleed air flow to the mainstream flow) is small. In order to achieve as much vector thrust as possible with a small amount of bleed air, it is of great significance to improve the vector nozzle and improve the vector efficiency.

Contents of the invention

The object of the present invention is to provide a binary vector nozzle capable of controlling the jetting direction of the airflow.

According to one aspect of the present invention, there is provided a fluid control binary vector nozzle with a baffle, which is characterized in that it includes a nozzle body and a baffle installed in the nozzle;

The inner flow path of the nozzle body includes: a nozzle shrinkage section, a nozzle throat, and a nozzle expansion section, wherein the nozzle shrinkage section, the nozzle throat, and the nozzle expansion section are sequentially connected;

The baffle, which is installed in the expansion section of the nozzle, is used to form a pressure cavity with the inner surface of the nozzle wall, and the direction of the main flow is changed by the rotation of the baffle to generate a vector thrust.

According to a further aspect of the present invention, a vector thrust generation and control method based on the above-mentioned fluid control binary vector nozzle with a diaphragm is provided, which is characterized in that it includes:

When the vector thrust is not needed, the bleed air is stopped, so that the partition is under the pressure of the main flow in the nozzle, and the bottom plate of the partition is attached to the inner wall of the nozzle, so that the nozzle is no different from the ordinary nozzle ;

When the thrust vector is required, the bleed air is turned on, so that the high-pressure gas is introduced through the holes/slots, and the partition is rotated to form a pressure cavity with the wall of the nozzle, thereby changing the jet flow direction of the main flow and realizing the thrust vector angle.

Description of drawings

Fig. 1 is a schematic structural view of a fluid control binary vector nozzle with a partition according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the structure of the baffle in the fluid control binary vector nozzle with baffle according to an embodiment of the present invention.

Fig. 3 is a schematic plan view of the outlet of the fluid control binary vector nozzle with baffles shown in Fig. 1 according to the embodiment of the present invention.

Fig. 4 is a three-dimensional schematic diagram of the fluid control binary vector nozzle with partitions shown in Fig. 3 according to the embodiment of the present invention.

Figure number:

Nozzle shrinkage section 1, nozzle transverse wall 2, nozzle throat 3, nozzle expansion section 4, hole/slot 5, pressure cavity formed by nozzle and partition 6, groove 7, partition 8, partition Installation shaft 9, partition convex plate 10, partition bottom plate 11, nozzle vertical wall 12.

Detailed ways

In order to realize the diversion of the jet nozzle airflow, a fluid control binary vector nozzle with a partition plate according to an embodiment of the present invention as shown in FIGS. 1 and 3 includes:

The inner flow path of the nozzle body includes the shrinking section 1 at the front of the throat, the throat of the nozzle 3, and the expanding section 4 of the nozzle, wherein the shrinking section 1 of the nozzle, the throat of the nozzle 3, the expanding section 4 of the nozzle, and connect;

A freely rotatable partition 8 is installed in the expansion section 4 of the nozzle, and the two ends of the installation shaft 9 of the partition 8 are installed on the vertical wall 12 of the nozzle (Fig. 3). tube inner wall. A pressure cavity 6 can be formed between the partition plate 8 and the inner wall surface of the transverse wall of the nozzle;

Holes/slots 5 for introducing high-pressure gas are provided on the wall surface of the nozzle within the range where the pressure cavity 6 is located.

Fig. 4 is a three-dimensional schematic diagram of the fluid control binary vector nozzle with partitions shown in Fig. 3 according to the embodiment of the present invention.

According to a further embodiment of the present invention, as shown in Figures 1 and 2, the above-mentioned fluid control belt partition binary vector nozzle also includes: a wall surface of the expansion section 4 of the nozzle for burying the partition The groove 7 of the raised plate 10.

As shown in Figure 2, according to an embodiment of the present invention, the partition 8 has a substantially T-shaped profile, and includes: a mounting shaft 9, the partition 8 can freely rotate around the mounting shaft 9; a partition convex plate 10; a partition Bottom plate 11.

Stop bleed when vectored thrust is not required. Due to the high pressure of the mainstream in the nozzle, the partition 8 is subjected to the pressure of the mainstream in the nozzle, the partition convex plate 10 is inserted into the groove 7 on the wall surface of the nozzle by itself, and the bottom plate 11 of the partition is attached to the inside of the nozzle. On the wall, the nozzle is no different from the ordinary nozzle at this time. When the thrust vector is needed, the bleed air is turned on, and the high-pressure gas is introduced through the hole/slot 5, so that the partition 8 rotates to form a pressure cavity 6 with the wall of the nozzle, thereby changing the jet flow direction of the main flow and realizing the thrust vector angle. Before the diaphragm convex plate 10 is completely separated from the groove 7, because the pressure cavity 6 is closed, the high-pressure bleed air cannot flow out, and the vector thrust can be generated when the bleed air flow is zero in theory; when the bleed air pressure is further increased, the diaphragm The turning angle becomes larger, and when the partition plate convex plate 10 is completely separated from the groove 7, the pressure cavity 6 is no longer closed, and the high-pressure gas flows out from the pressure cavity 6 to form a secondary flow.

According to a further embodiment of the present invention, by opening and/or closing the bleed air on the upper side and the lower side of the nozzle, the main flow in the nozzle is deflected upward or downward, thereby generating an upward or downward vector thrust and controlling the bleed air The magnitude of the pressure is used to control the magnitude of the thrust vector angle.

Advantages of the present invention include:

The invention is a vectoring nozzle installed on an aero-engine, and has the advantages of simple structure, light weight, large vectoring thrust and high vectoring efficiency without causing or little bleed air.

Claims (9)

1. A binary vector nozzle with diaphragm fluid control, characterized in that it comprises a nozzle body and a partition installed in the nozzle; The inner flow path of the nozzle body includes: nozzle constriction section (1), nozzle throat (3), nozzle expansion section (4), wherein, nozzle constriction section (1), nozzle throat (3) , The expansion section of the nozzle (4) is sequentially connected; The partition (8), which is installed in the expansion section of the nozzle (4), is used to form a pressure cavity (6) with the wall of the nozzle, and the direction of the main flow is changed by the rotation of the partition to generate a vector thrust . 2. The binary vector nozzle with baffle fluid control according to claim 1, characterized in that said baffle comprises: The installation shaft (9), the partition can freely rotate around the installation shaft (9); Partition convex plate (10); Partition bottom plate (11); in The nozzle wall includes a nozzle transverse wall (2) and a nozzle longitudinal wall (12), The two ends of the installation shaft (9) are installed on the longitudinal wall (12) of the nozzle, and the entire installation shaft is close to the inner wall of the nozzle at the transverse wall (2) of the nozzle, The pressure cavity (6) can be formed between the partition plate (8) and the inner wall surface of the transverse wall of the nozzle. 3. The fluid control binary vector nozzle with clapboard according to claim 1, characterized in that there are holes/ Slit (5) for introducing high-pressure gas. 4. The fluid control binary vector nozzle with partitions according to claim 1, characterized in that: the wall of the nozzle and the partitions can form a pressure cavity (6), and the high-pressure gas can pass through as described in claim 2 The holes/slots (5) opened on the transverse wall (2) of the nozzle lead into the pressure cavity. 5. According to claim 1, the band diaphragm fluid control binary vector nozzle is characterized in that it further comprises: The groove (7) provided on the wall surface of the nozzle above the partition (8) of the nozzle expansion section (4), wherein, when the pressure of the high-pressure gas is not introduced or the pressure of the introduced high-pressure gas is relatively small, The partition convex plate (10) is inserted into the groove (7). 6. The fluid control binary vector nozzle with baffles according to claim 1, characterized in that: there are two baffles (8), holes/slits (5), and grooves (7) respectively, which are respectively set on the upper and lower sides of the nozzle. 7. Based on the vector thrust generation and control method of the band diaphragm fluid control binary vector nozzle according to claim 4, it is characterized in that comprising: When the vector thrust is not needed, the bleed air is stopped, so that the partition (8) is under the pressure of the main flow in the nozzle, and the bottom plate of the partition (11) is attached to the inner wall of the nozzle, so that the nozzle No different from ordinary nozzles; When the thrust vector is required, the bleed air is turned on, so that the high-pressure gas is introduced through the hole/slot (5), and the partition (8) is rotated to form a pressure cavity (6) with the wall of the nozzle, thereby changing the jet flow direction of the main flow , to achieve the thrust vector angle. 8. The method according to claim 7, characterized in that: The fluid control binary vector nozzle with a partition further includes a groove (7) provided on the wall of the nozzle above the partition (8) of the nozzle expansion section (4), wherein, when the nozzle is not introduced When the pressure of the high-pressure gas or the introduced high-pressure gas is small, the partition convex plate (10) is inserted into the groove (7), and among them Because the pressure cavity (6) is closed and the bleed air cannot flow out before the partition convex plate (10) is completely out of the groove (7), vector thrust can be generated even when the bleed air flow rate tends to zero ; When the pressure of the bleed air increases to increase the corner of the partition until the convex plate (10) of the partition completely breaks away from the groove (7), the pressure cavity (6) is no longer closed, and the bleed air from the pressure cavity 6 flow out to form a secondary flow. 9. The method according to claim 8, characterized in that In the fluid control binary vector nozzle with baffles, there are two baffles (8), holes/slots (5), and grooves (7), which are respectively arranged on the upper side of the nozzle and underside, in By opening and/or closing the bleed air on the upper and lower sides of the nozzle, the main flow in the nozzle is deflected upward or downward, thereby generating an upward or downward vector thrust, and controlling the bleed air pressure to control the thrust vector angle .

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