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Bush assembly capable of adjusting air flow of combustion zone

A technology of air flow and combustion area, which is applied in the direction of combustion chamber, combustion method, combustion equipment, etc., can solve the problems of high flame temperature, nitrogen monoxide emission, and low fuel volume, so as to increase the air volume in the annular area and prevent fuel shortage The effect of flameout, intensified premix effect

Active Publication Date: 2018-08-28
CAS HEFEI MICRO GAS TURBINE RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To avoid lean flameout, many burners operate under richer conditions, but these conditions result in higher flame temperatures and greater NO emissions
[0004] The existing combustion chamber adopts lean premixed combustion to reduce the emission of pollutants in the combustion chamber, which is called DLN combustion chamber. In the idle state, the fuel quantity is low, and the risk of lean fuel flameout is greater

Method used

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  • Bush assembly capable of adjusting air flow of combustion zone
  • Bush assembly capable of adjusting air flow of combustion zone
  • Bush assembly capable of adjusting air flow of combustion zone

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the following will describe the exemplary embodiments in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated.

[0025] refer to figure 1 As shown, the liner assembly 21 of the gas turbine combustor 20 that can adjust the air flow in the combustion zone of the embodiment of the present invention is shown. The liner assembly 21 includes a liner outer wall 22 with a thickness of 3 mm and is annular. The upstream side of the liner outer wall 22 has a mounting hole 23, and the position of the mounting hole 23 is aligned with the main combustion hole 24 of the combustion chamber 20 in the axial direction. Adjust the air intake flow of the main combustion hole 24; the sealing sleeve 25, with a...

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Abstract

The invention discloses a bush assembly capable of adjusting air flow of a combustion zone so as to solve the problem that lean-oil flameout of idling rating in a currently-occurring condition. The bush assembly comprises an bush out wall, a sealing sleeve, a floating body and a moving mechanism, wherein the bush outer wall is of a annular shape, and an installing hole is formed in an upstream endof the bush outer wall, the sealing sleeve is in a cylindrical shape and is coaxially fixed with the installing hole, and a floating channel is formed inside the sealing sleeve, the floating body isarranged on the inner side of the sealing sleeve in a coaxial mode, and can move up and down inside the floating channel, and the moving mechanism is connected with the floating body and controls thefloating body to move up and down. The bush assembly capable of adjusting air flow of combustion zone has the beneficial effects that the area of an air flow channel is changed by changing the heightof the bush outer wall, and therefore the air flow rate is changed, and the jet angle of an air inlet hole is finally influenced, the effect of adjusting the air flow of an annular region is achieved;the oil-gas ratio of the annular region can be adjusted by adjusting the air flow of the annular region, so that the phenomenon of lean-oil flameout of a combustor in the idling rating is prevented;and meanwhile, when the combustor works in a pre-mixing mode, the air amount of the annular region can be increased, so that the premixed effect of fuel and air is enhanced.

Description

technical field [0001] The invention belongs to the field of low-emission combustion chambers of gas turbines, and relates to a liner assembly, in particular to a liner assembly capable of adjusting air flow in a combustion zone. Background technique [0002] A typical gas turbine combustor has primary and secondary fuel nozzles. This type of burner has four operating modes, namely main mode, lean-lean, auxiliary mode and premix mode. Main mode is used to fire the burner when only fuel is being delivered to the main nozzle. In lean-lean mode, the secondary nozzles are also fired and fuel is delivered to the primary and secondary nozzles. In auxiliary mode, fuel is delivered to the auxiliary nozzles only, thereby extinguishing the flame at the main nozzles. Whereas in premixed mode, fuel is delivered to the primary and secondary nozzles, but the flame is only present in the secondary nozzle area, and the premixed fuel gas mixture is optimized for desired performance includ...

Claims

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Application Information

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IPC IPC(8): F23R3/02
CPCF23R3/02
Inventor 张磊尚伟张志超张兴磊孟丽杨超井彬
Owner CAS HEFEI MICRO GAS TURBINE RES INST CO LTD
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