A Lean Oil Premixed Flame Tube Intake Structure
A technology of air intake structure and flame cylinder, which is applied in combustion methods, lighting and heating equipment, continuous combustion chambers, etc., can solve problems such as tempering, affecting the safe operation of combustion chambers, and self-ignition, so as to reduce combustion temperature and reduce pollution As well as the effect of fuel consumption and reduced air velocity
Active Publication Date: 2022-05-27
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
In addition, the fuel should not stay in the mixing area for too long, otherwise tempering and self-ignition will occur, which will affect the safe operation of the combustion chamber
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[0019] Now in conjunction with accompanying drawing, the present invention will be further described:
[0020] combine figure 1 , figure 2 , The present invention provides a lean oil premixed flame tube intake structure. figure 1 It is an overall schematic diagram of the intake structure of a lean premixed flame tube, figure 2 It is a cross-sectional view of the intake structure of a lean oil premixed flame tube.
[0021] When the upstream flow passes through the head of the flame tube, the airflow enters from the annular restrictor plate 1 around the head, and the incoming airflow passes through the expanded air inlet 2 and the axial velocity is greatly reduced and a radial velocity is obtained. The air flow enters the premixing chamber 4 together with the fuel provided by the fuel nozzle 3, and after the two-phase flow is mixed in the premixing chamber 4, it enters the downstream combustion zone through the swirler 6. In the present invention, a restrictor plate 1 with...
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The invention provides a premixed flame cylinder air intake structure, a part of the airflow in the front section of the flame cylinder enters the expansion airflow channel before the premixing section through the hole of the diversion plate on the side, which effectively reduces the radial velocity of the airflow, and the airflow and spray The fuel sprayed from the oil channel is mixed with each other in the premixing section, and the atomized oil droplets are evenly distributed in the air flow through the action of the swirler, and then supplied to the combustion area for ignition and combustion. The invention changes the position and shape of the air intake section of the ordinary flame tube, and adds a restrictor plate at the air intake port to control the intake air flow and the radial velocity of the air flow, and designs a premixing section after the fuel nozzle to make the fuel and air flow in the air. The mixing is completed before ignition. In addition, the swirler at the tail can improve the uniformity of the distribution of atomized oil droplets in the airflow, which can achieve more stable ignition and combustion, reduce the generation of pollutants, reduce fuel consumption and improve economy.
Description
technical field [0001] The invention belongs to the field of gas turbine engines, and in particular relates to an air intake structure of a lean oil premixed flame tube. Background technique [0002] The main development trend of aero-engine combustion chamber is low-polluting emission combustion, and the main problem currently faced is to reduce the emission of pollutants, especially NOX. The core technology is to reduce the temperature of the combustion zone and make the temperature field of the combustion zone uniform, that is, the overall and local equivalence ratio control, and the uniformity of the equivalence ratio of the main combustion zone mainly depends on the uniformity of fuel atomization and oil-gas blending. [0003] Lean premixed combustion has been widely used as a mature dry low NOx technology. The so-called lean premixed combustion is the premixing of fuel and air upstream of the combustion chamber to avoid a region where the ratio of fuel and air is clos...
Claims
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IPC IPC(8): F23R3/28F23R3/38
CPCF23R3/286F23R3/38
Inventor 张群马晓曦高耀红王紫欣王晓燕
Owner NORTHWESTERN POLYTECHNICAL UNIV