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A burner outlet expansion section and a burner using the same

A technology of burner and expansion section, which is applied in the direction of burner, lighting and heating equipment, etc. It can solve the problems of unstable combustion and easy oscillation, and achieve the effects of enhancing combustion stability, reducing length and reducing flow loss

Active Publication Date: 2018-08-10
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the main flame is stable at the low-velocity edge of the shear layer, periodic vortex shedding will occur near the low-velocity region of the shear layer, and oscillations will easily occur near the stable point, and combustion instability will easily occur when operating in non-design conditions

Method used

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  • A burner outlet expansion section and a burner using the same
  • A burner outlet expansion section and a burner using the same
  • A burner outlet expansion section and a burner using the same

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that in the drawings or descriptions of the specification, similar or identical parts use the same reference numerals. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring to the directions of the ...

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Abstract

The invention discloses a burner outlet expansion section. A concave cavity is formed in the burner outlet expansion section, a plurality of sets of plasma exciters are arranged in the concave cavity, and plasma can heat fluid, produce active particles, induce flowing and enhance the swirling motion in the concave cavity, and thus fluid mixing in a burning zone can be facilitated, the burning state is improved, the burning stability is enhanced, and the flame length is shortened. The invention also discloses a burner adopting the burner outlet expansion section. According to the burner outlet expansion section, the effects that the stable operation range of the burner is broadened, the burning efficiency is improved and the axial size of a burning chamber is reduced are achieved; the problem of unstable burning of large-angle expansion sections is solved, and the problem of unstable burning caused by burning low-heat value fuel can also be solved.

Description

technical field [0001] The invention relates to the field of combustion devices, in particular to a burner outlet expansion section and a burner using the same. Background technique [0002] Gas turbines are widely used in electric power, aviation, petrochemical and other industries due to their small size and large output power. Due to the energy crisis and environmental deterioration, it is urgent to develop high-efficiency and clean combustion chambers, which are required to have the characteristics of reliable ignition, stable combustion, high efficiency and low emissions. At present, the problem of environmental pollution in our country is very serious, and it is very urgent to develop clean combustion technology of gas turbines. Gas turbine manufacturers have developed a variety of clean combustion technologies, such as lean premixed combustion technology, dilute-phase premixed pre-evaporation technology, lean oil direct injection technology, and catalytic combustion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D11/32
CPCF23D11/32
Inventor 李钢徐燕骥朱俊强徐纲
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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