Afterburner double-layer rectifier strut
A technology of afterburner and rectifier support plate, applied in the direction of combustion chamber, continuous combustion chamber, combustion method, etc., can solve the problems of limited size of recirculation area and limited size of rectifier support plate, etc., to improve the low-speed airflow area and the combustion stability. , the effect of increasing the stable working range
Active Publication Date: 2019-07-05
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
Due to the limited size of the rectifying strut, the recirculation area provided by the concave cavity at the end of the rectifying strut is limited
Method used
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[0019] The present invention will be further described now in conjunction with accompanying drawing:
[0020] combine figure 1 , figure 2 with image 3 , The invention provides a double-layer rectifying strut structure in the afterburner, which can effectively reduce the air velocity at the inlet of the afterburner and improve the stable combustion range of the flame. figure 1 is a sectional view of the afterburner, figure 2 For afterburner rear view, image 3 is a perspective view of the afterburner, Figure 4 It is a schematic diagram of the rectifying strut blade shape.
[0021] In the afterburner, the inlet airflow velocity is fast and the pressure is low. The high-speed airflow will make it very difficult to ignite and maintain the stable combustion of the flame. normal ignition and combustion. Generally, a V-shaped groove flame stabilizer is installed in the combustion chamber, but due to the excessive aerodynamic resistance, the rectifying support plate is comb...
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The invention provides an air inlet structure of afterburner double-layer rectification supporting plates. By means of the air inlet structure, air flow can be decelerated twice, the area of low-speed air flow can be effectively increased in an afterburner, and accordingly stable operation of flames in the afterburner can be ensured. The two layers of rectification supporting plates are arranged at an inlet of the afterburner and on the tail portion of a thrust augmentation caudal vertebra respectively, an inner sleeve arranged on the tail portion of the thrust augmentation caudal vertebra divides the air flow into an inner part and an outer part, outer air is used for combustion compensation and cooling, inner air is used for primary combustion, and accordingly the air flow is fully used. Meanwhile, a gradually-expanded inlet of the inner sleeve can further decelerate the air flow to guarantee stable and sufficient combustion of an inner air primary combustion area.
Description
technical field [0001] The invention belongs to the field of afterburner, and in particular relates to a front and rear two-layer integrated rectifying support plate in the afterburner, which reduces the airflow velocity and increases the flame stability range of the combustion chamber. Background technique [0002] The use of afterburner is an important technical means to improve the thrust-to-weight ratio of aeroengines. However, the working environment of the afterburner is poor, and the gas discharged from the outlet of the turbine has high temperature, low pressure and high velocity, which is not conducive to the ignition and combustion of the gas in the afterburner. Ignition and tissue combustion in the afterburner, but the traditional afterburner fuel injection device and flame stabilizer are directly placed in the main gas flow path of the afterburner, which will inevitably block the main air flow, resulting in obvious The total pressure loss, especially the flow re...
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IPC IPC(8): F23R3/18
CPCF23R3/18
Inventor 张群李逸飞黎超超寇睿李承钰宋亚恒
Owner NORTHWESTERN POLYTECHNICAL UNIV