CN114646078A - A new type of afterburner rectifier strut structure - Google Patents

Abstract

The present invention provides a new type of afterburner rectifier strut structure, which is based on the classic rectifier strut flame stabilizer structure of an integrated afterburner, and a layer of rectifier plates with airflow holes is arranged outside the structure, and the airflow and the The direct impact of fuel can effectively improve the atomization effect of fuel. In the present invention, an outer rectifying support plate is arranged outside the classic rectifying support plate, and a part of the airflow from the turbine enters the channel between the outer rectifying support plate and the inner rectifying support plate flame stabilizer, which plays the role of preheating and preliminarily atomizing fuel. The other part of the airflow enters the space between the inner rectifier support plate flame stabilizer and the outer rectifier support plate through the outer rectifier plate with air holes, and the high-speed airflow directly collides with the fuel ejected from the fuel injection hole, which further improves the atomization effect of the fuel. , thereby improving the combustion efficiency.

Description

A new type of afterburner rectifier strut structure

technical field

The invention belongs to the field of gas turbine engines, and in particular relates to a novel rectifying strut structure of an afterburner.

Background technique

Conventional aero-engines cannot meet the requirements of good performance over the entire thrust range. The thrust of the plane is much higher when taking off than when cruising. If the engine is designed according to the thrust requirement during take-off, the mass of the engine will be too large, and the engine will be in an unsatisfactory working state during cruising, resulting in poor overall performance. If the engine is designed according to the thrust requirements during cruise, the aircraft cannot take off normally. Therefore, arranging an afterburner between the turbine and the tail nozzle can effectively solve the above problems, that is, to greatly increase the thrust of the engine in a short period of time, without increasing the weight much, so that the engine has excellent performance.

The afterburner is located between the turbine and the tail nozzle. The temperature of the gas discharged from the turbine outlet is higher, the flow rate is faster, and the residence time of the fuel is shorter, which is not conducive to the combustion of the gas in the afterburner, so the combustion efficiency is low. . Therefore, how to achieve stable ignition and combustion in high-speed airflow and reduce losses has become an important research direction of afterburner. The proper combustion chamber design can obtain better fuel vaporization and atomization effect, which can effectively improve the working efficiency of the combustion chamber.

SUMMARY OF THE INVENTION

The problem to be solved by the present invention is to propose a new type of afterburner rectifier strut structure. Compared with the prior art, the present invention is mainly based on the classic integrated afterburner and the internal rectifier strut flame stabilizer. The external rectifier plate is arranged outside. The outer fairing plate is provided with air holes, and the gas behind the turbine passes through the air holes to form a high-speed gas jet, which collides violently with the fuel ejected from the fuel injection holes, causing the fuel to evaporate and atomize rapidly. Strong airflow disturbance will further collide the fuel with the inner rectifying support plate and the outer rectifying plate to achieve better fuel atomization effect and oil and gas mixing effect, thereby expanding the stable working range of the afterburner and improving the combustion chamber. combustion efficiency.

Technical solutions

The purpose of the present invention is to provide a novel afterburner rectifying support plate structure.

The technical scheme of the present invention is as follows:

A new type of afterburner rectifying support plate structure includes an outer rectifying plate structure, an inner rectifying support plate flame stabilizer structure and related structural features.

The structure of the outer rectifying plate is characterized in that the outer rectifying support plate adopts a streamlined structure, the height of which depends on the height of the afterburner, and the air holes penetrating the outer rectifying plate are distributed on it. The diameter of the air holes is 0.5-1.00mm, and the air holes are arranged in two rows along the radial direction, and the specific number depends on the actual height of the combustion chamber.

The internal rectifying support plate flame stabilizer is characterized in that the internal rectifying support plate is a streamlined structure, the thickness is 25-35mm, the flow direction length is 110-150mm, the head curve is a streamlined design, and the radial length depends on the afterburner. the actual height of the room.

The internal rectification support plate flame stabilizer is characterized in that there is a fuel channel inside the inner rectification support plate flame stabilizer, the width is 5-18mm, the length is 25-95mm, and the radial runs through the inner rectification support plate flame stabilizer. .

The internal rectifying support plate flame stabilizer is characterized in that the two sides of the internal rectifying support plate flame stabilizer are arranged with fuel injection holes connected with the fuel passage, the diameter of the fuel injection holes is 0.5-1.0 mm, and the two fuel injection holes are along the diameter Two rows are arranged in the same direction, the exact number depends on the height of the afterburner.

The overall arrangement of the rectifying plate is characterized in that the outer rectifying plate and the inner rectifying support plate flame stabilizer are fixed on the inner afterburning cone in the radial direction, and the distance between them is 15-30 mm, and other size parameters can be determined according to The actual requirements and size of the combustion chamber are determined.

The present invention has the following beneficial effects:

A new type of afterburner rectifier strut structure designed by the invention has the advantage that the outer rectifier is mainly arranged outside the inner rectifier strut flame stabilizer on the basis of the classic integrated afterburner. The outer fairing plate is provided with air holes, and the gas behind the turbine passes through the air holes to form a high-speed gas jet, which collides violently with the fuel ejected from the fuel injection holes, causing the fuel to evaporate and atomize rapidly. Strong airflow disturbance will further collide the fuel with the inner rectifying support plate and the outer rectifying plate to achieve better fuel atomization effect and oil and gas mixing effect, thereby expanding the stable working range of the afterburner and improving the combustion chamber. combustion efficiency.

Description of drawings

Figure 1: Overall schematic diagram of the structure of a new type of afterburner rectifier support plate

Figure 2: Front view of a new type of afterburner rectifier strut structure

Figure 3: A cross-sectional view of a new type of afterburner rectifier strut structure

In the picture: 1. Afterburner inner cone, 2. Rectifier support plate as a whole, 3. Streamlined external rectifier plate, 4. Internal rectifier support plate flame stabilizer, 5. Fuel channel, 6. Fuel injection hole, 7. Air hole .

Detailed ways

Now in conjunction with the accompanying drawings, the present invention will be further described:

1, 2, and 3, the present invention provides a new type of afterburner rectifying support plate structure. Figure 1 is an overall schematic diagram of a new type of afterburner rectifier support plate structure, Figure 2 is a front view of a new type of afterburner rectifier support plate structure, and Figure 3 is a cross-sectional view of a new type of afterburner rectifier support plate structure.

The gas flow enters the afterburner after passing through the turbine, and part of the air flow enters the airflow channel between the streamlined outer rectifier plate 3 and the inner rectifier support plate flame stabilizer 4. The fuel in the channel 5 is heated, and the fuel is sprayed out through the fuel injection hole 6 to be preliminarily mixed with this part of the airflow. The rest of the airflow after the turbine enters the interior through the air holes 7 on the streamlined outer fairing plate 3 to form a high-speed gas jet. The better crushing and atomization effect makes the oil and gas mixing more fully, which helps the tissue combustion of the combustion chamber and effectively improves the combustion efficiency.

Claims (6)

1. A new type of afterburner rectifying support plate structure, including the structure of the outer rectifying plate, the internal rectifying support plate flame stabilizer structure and related structural features. 2. A new type of afterburner rectifying support plate structure according to claim 1 is characterized in that the outer rectifying support plate adopts a streamlined structure, and its height depends on the height of the afterburner, and there are distributed penetrating external rectifying plates on it. stomata. The diameter of the air holes is 0.5-1.00mm, and the air holes are arranged in three rows along the radial direction, and the specific number depends on the actual height of the combustion chamber. 3. A new type of afterburner rectifying support plate structure according to claim 1 or 2, characterized in that the inner rectifying support plate is a streamlined structure, the thickness is 25-35mm, the flow direction length is 110-150mm, and the head curve is For a streamlined design, the radial length depends on the actual height of the afterburner. 4. A new type of afterburner rectifying strut structure according to claim 1, 2 or 3, characterized in that there is a fuel channel inside the internal rectifying strut flame stabilizer, the width is 5～18mm, and the length is 25～ 95mm, radially through the inner rectifier strut flame stabilizer. 5. A novel afterburner rectifying strut structure according to claim 1, 2, 3 or 4, characterized in that both sides of the internal rectifying strut flame stabilizer are arranged with fuel injection holes connected to the fuel passage, The diameter of the injection holes is 0.5 to 1.0 mm, and the two injection holes are arranged in two rows along the radial direction, and the specific number depends on the height of the afterburner. 6. A new type of afterburner rectifying support plate structure according to claim 1, 2, 3, 4 or 5, characterized in that both the outer rectifying plate and the inner rectifying support plate flame stabilizer are radially fixed to the rectifying support plate. On the inner cone of force, the distance between the two is 15-30mm, and other size parameters can be determined according to the actual needs and size of the combustion chamber.

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