Trapped vortex combustor head device for preventing main flow from being entrained towards cavity

Abstract

The invention discloses a trapped vortex combustor head device for preventing main flow from being entrained towards a cavity. The front wall face of the cavity in the device, a central bluff body, a flow guide plate, a supporting plate and a cap form an integrated structure; the front wall face of the cavity, the flow guide plate and the cap form a cavity structure; an air inlet seam for making the cavity structure communicate with a main flow channel is formed in the flow guide plate; and air in the cavity structure is jetted by the air inlet seam into the main flow channel in the direction perpendicular to the main flow channel. By reasonably designing and arranging the air inlet seam of the flow guide plate, the entrainment, caused by the supporting plate, of partial air towards the cavity can be effectively prevented, the influence of entrainment air on the flow field in the cavity is further reduced, and the cavity can stabilize flame at a higher main flow rate. Meanwhile, the burden of the head device can be reduced, and therefore, the structural weight of the whole combustor is reduced.

Description

technical field [0001] The invention belongs to the technical field of combustion chambers, and in particular relates to a head device of a trapped vortex combustion chamber capable of suppressing entrainment of a main flow to a concave cavity. Background technique [0002] As human beings pay more and more attention to the living environment and health, the development method of sacrificing the environment for economic growth is becoming less and less recognized by people. World environmental protection organizations and various countries have continuously formulated new environmental protection regulations to limit the discharge of various pollutants, and have also put forward more and more stringent requirements for the discharge of aero-engines. Therefore, the control of pollutant emissions from aero-engines has aroused great concern from the people and governments of various countries. [0003] Aeroengine pollutant emissions mainly come from the combustion chamber, whi...

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Problems solved by technology

[0006] Purpose of the invention: the purpose of the present invention is to provide a head device of the trapped vortex combustor with the ability to suppress the entrainment of the main direction concave cavity. The present invention can not only achieve The purpose of suppressing the entrainment of air to the concave cavity and protecting the flow field in the cavity from being damaged by the entrained air can also reduce the weight of the head structure of the vortex combustor, which solves the problem of the existing vortex combustor due to the design of the support plate. structure, leading to the problem that the cavity cannot effectively stabilize the flame

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