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Burner outlet expansion section and burner adopting same

A technology of burner and expansion section, which is applied in the field of burner and burner outlet expansion section, which can solve problems such as easy oscillation and combustion instability, and achieve the effects of reducing length, enhancing combustion stability, and reducing axial size

Active Publication Date: 2016-03-23
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • 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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  • Burner outlet expansion section and burner adopting same
  • Burner outlet expansion section and burner adopting same
  • Burner outlet expansion section and burner adopting same

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Embodiment Construction

[0042] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, in the drawings or description of the specification, similar or identical parts use the same reference signs. The implementations not shown or described in the drawings are those known to those of ordinary skill in the art. In addition, although this article may provide an example of a parameter containing a specific value, it should be understood that the parameter does not need to be exactly equal to the corresponding value, but can be approximated to the corresponding value within acceptable error tolerances or design constraints. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only directions with reference to the dra...

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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 present invention relates to the field of combustion devices, and more specifically to a combustor outlet expansion section and a combustor 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 the deterioration of the environment, there is an urgent need to develop an efficient and clean combustion chamber, which requires reliable ignition, stable combustion, high efficiency and low emissions. The current environmental pollution problem in my country is very serious, and the development of clean combustion technology for gas turbines is very urgent. Gas turbine manufacturers have developed a variety of clean combustion technologies, such as lean premixed combustion technology, lean phase premixed preevaporation technology, lean oil direct injection technology, and catalytic combustion technol...

Claims

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Application Information

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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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