CN105716114B - Detachable rectangular diffuser - Google Patents

Abstract

A removable rectangular diffuser, characterized by: the replaceable rectangular diffuser comprises an inlet turbulence generator, an inlet mounting edge, a preposed diffuser, a sudden expansion section, a casing, a cap cover and a rear air-entraining section; the method specifically comprises the following steps: the inlet turbulence generator is communicated with the preposed diffuser; the front diffuser is fixed through an inlet mounting edge, and the mounting edge is connected with the sudden expansion section through a bolt; the sudden expansion section is connected with the casing and completely contains the internal cap cover, and the rear air guide section is connected with the cap cover. The invention has the advantages that: the detachable rectangular diffuser has the advantages of simple structure and high reliability, and the inlet section, the sudden expansion section and the tail section can be independently replaced without affecting the whole installation and the normal work of other parts.

Description

A removable rectangular diffuser

technical field

The invention relates to the field of aero-engine combustion chamber diffuser test pieces, in particular to a removable rectangular diffuser.

Background technique

The role of the diffuser in the combustion chamber of an aero-engine is to rectify and decelerate the high-speed airflow at the outlet of the compressor to achieve the conditions suitable for the combustion of the flame tube. The size of the static pressure recovery coefficient of the diffuser and the size of the total pressure loss directly affect the overall performance of the combustion chamber, so it is necessary to conduct in-depth research on the diffuser. Traditional diffuser test pieces require a large number of test pieces for comparison, wasting a lot of resources.

Contents of the invention

The purpose of the present invention is to separately disassemble according to needs without affecting the use of other components, and provides a detachable and replaceable rectangular diffuser.

The invention provides a removable rectangular diffuser, characterized in that: the removable rectangular diffuser includes an inlet turbulence generator 1, an inlet mounting edge 2, and a prediffuser 3 , the sudden expansion section 4, the casing 5, the cap 6 and the rear bleed air section 7;

Specifically: the inlet turbulence generator 1 communicates with the prediffuser 3; the prediffuser 3 is fixed by the inlet installation side 2, and the installation side 2 and the sudden expansion section 4 are connected together by bolts; the sudden expansion section 4 and the The casing 5 is connected, and the inner cap 6 is completely accommodated, and the rear air-inducing section 7 is connected with the cap 6 .

The inlet turbulence generator 1 is installed in front of the prediffuser 3 and fixed together with the prediffuser 3 by screws.

The front section of the prediffuser 3 is a horizontal rectification section to ensure a smooth transition of air flow, and the rear section is the flow channel profile of the prediffuser. The pre-diffuser is divided into upper and lower parts, which are respectively fixed on the inlet turbulence generator 1 with bolts, and the middle part supports each other by closely matching with the installation side 2.

The front end and rear end of the sudden expansion section 4 are respectively processed with installation edges to facilitate connection with the installation side 2 and the casing 5, and the middle section is the sudden expansion section of the diffuser, with different angles of sudden expansion for easy testing In-process comparisons and research.

Described casing 5, front end and rear end are respectively processed with mounting edge.

The cap 6, the left and right sides are rectangular steel plates, the middle part is a steel plate imitating the shape of the flame tube head cap, and the upper and lower sides of the steel plate are processed with mounting support plates to connect the cap 6 and the air-inducing section through bolts together. The middle part is welded together with the steel plates on the left and right sides to prevent air leakage on both sides. Similarly, different schemes can be processed here according to the size or length of the cap opening, which can be replaced separately without affecting other parts.

The air-inducing section 7, the front end is a mounting edge and a cover structure that connects the cap 6 and the casing 5 into one body, and the surface where the cap 6 fits is provided with a groove, which can fix the cap 6 on the cover , and tighten the mounting bolts. The cover plate is divided into 3 areas with the upper and lower parts of the cap as the boundary. There are many small holes in these three areas, so that the rear part of the air-introducing section 7 can lead the air out. The small holes can also be adjusted according to the air-inducing ratio. need to be partially blocked for comparison purposes.

Advantages of the present invention:

In the replaceable rectangular diffuser of the present invention, the inlet section, the sudden expansion section and the tail section can all be replaced separately without affecting the overall installation and the normal operation of other parts. In-depth research on the diffuser, parameters such as total pressure loss, static pressure recovery, etc. have been obtained. At the same time, it has the advantages of simple structure and high reliability.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

Figure 1 is a front view of a removable rectangular diffuser;

Fig. 2 is a top view of a removable rectangular diffuser;

Figure 3 is a left side view of a removable rectangular diffuser.

Detailed ways

Example 1

This embodiment provides a removable rectangular diffuser, which is characterized in that: the removable rectangular diffuser includes an inlet turbulence generator 1, an inlet mounting edge 2, and a pre-diffuser 3. Sudden expansion section 4, casing 5, cap 6 and rear bleed air section 7;

Specifically: the inlet turbulence generator 1 communicates with the prediffuser 3; the prediffuser 3 is fixed by the inlet installation side 2, and the installation side 2 and the sudden expansion section 4 are connected together by bolts; the sudden expansion section 4 and the The casing 5 is connected, and the inner cap 6 is completely accommodated, and the rear air-inducing section 7 is connected with the cap 6 .

The inlet turbulence generator 1 is installed in front of the prediffuser 3 and fixed together with the prediffuser 3 by screws.

The front section of the prediffuser 3 is a horizontal rectification section to ensure a smooth transition of air flow, and the rear section is the flow channel profile of the prediffuser. The pre-diffuser is divided into upper and lower parts, which are respectively fixed on the inlet turbulence generator 1 with bolts, and the middle part supports each other by closely matching with the installation side 2.

The front end and rear end of the sudden expansion section 4 are respectively processed with installation edges to facilitate connection with the installation side 2 and the casing 5, and the middle section is the sudden expansion section of the diffuser, with different angles of sudden expansion for easy testing In-process comparisons and research.

Described casing 5, front end and rear end are respectively processed with mounting edge.

The cap 6, the left and right sides are rectangular steel plates, the middle part is a steel plate imitating the shape of the flame tube head cap, and the upper and lower sides of the steel plate are processed with mounting support plates to connect the cap 6 and the air-inducing section through bolts together. The middle part is welded together with the steel plates on the left and right sides to prevent air leakage on both sides. Similarly, different schemes can be processed here according to the size or length of the cap opening, which can be replaced separately without affecting other parts.

The air-inducing section 7, the front end is a mounting edge and a cover structure that connects the cap 6 and the casing 5 into one body, and the surface where the cap 6 fits is provided with a groove, which can fix the cap 6 on the cover , and tighten the mounting bolts. The cover plate is divided into 3 areas with the upper and lower parts of the cap as the boundary. There are many small holes in these three areas, so that the rear part of the air-introducing section 7 can lead the air out. The small holes can also be adjusted according to the air-inducing ratio. need to be partially blocked for comparison purposes.

Claims (7)

1. A removable rectangular diffuser, characterized in that: the removable rectangular diffuser includes an inlet turbulence generator (1), an inlet mounting edge (2), a pre-diffuser Device (3), sudden expansion section (4), casing (5), cap (6) and rear bleed air section (7); Specifically: the inlet turbulence generator (1) communicates with the prediffuser (3); the prediffuser (3) is fixed by the inlet installation edge (2), and the inlet installation edge (2) is connected to the sudden expansion section ( 4) are connected together by bolts; the sudden expansion section (4) is connected with the casing (5), and completely accommodates the inner cap (6), and the rear air-inducing section (7) is connected with the cap (6). 2. The replaceable rectangular diffuser according to claim 1, characterized in that: the inlet turbulent flow generator (1) is installed in front of the pre-diffuser (3), connected to the front by screws Set the diffuser (3) and fix it together. 3. The replaceable rectangular diffuser according to claim 1, characterized in that: the front section of the pre-diffuser (3) is a horizontal rectification section to ensure a smooth transition of airflow, and the rear section is a front section The flow channel profile of the diffuser; the pre-diffuser is divided into upper and lower parts, which are respectively fixed on the inlet turbulent flow generator (1) with bolts, and the middle part is closely matched with the inlet installation edge (2). supporting each other. 4. The replaceable rectangular diffuser according to claim 1, characterized in that: the front and rear ends of the sudden expansion section (4) are respectively processed with edges (2) and casings for easy and inlet installation (5) The installation side of the connection, the middle section is the sudden expansion section of the diffuser. 5. The replaceable rectangular diffuser according to claim 1, characterized in that: the front and rear ends of the casing (5) are respectively processed with inlet mounting edges (2). 6. The replaceable rectangular diffuser according to claim 1, characterized in that: said cap (6), the left and right sides are rectangular steel plates, and the middle part is a simulated flame tube head cap Shaped steel plate, the upper and lower sides of the steel plate are processed with mounting support plates. 7. The replaceable rectangular diffuser according to claim 1, characterized in that: the front end of the air-introducing section (7) connects the cap (6) and the casing (5) into one The side and the cover plate structure are installed, and grooves are provided on the surface where the cap (6) fits, so that the cap (6) can be fixed on the cover plate.