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plasma nozzle

A plasma and nozzle technology, applied in the field of plasma nozzles, can solve problems such as easy oscillation and combustion instability, and achieve the effects of eliminating dissipation, simplifying structure, and enhancing swirl intensity.

Active Publication Date: 2019-08-23
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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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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Embodiment Construction

[0035] Based on various technical defects of the existing technology, in order to solve the main challenges faced by the plasma flow control technology: reduce the dissipation effect of the wall surface, enhance the control strength of the plasma flow; and improve combustion stability, reduce NO x To generate, reduce flow loss, and prevent flashback, the present invention provides a plasma nozzle, which includes: an axial suspension plate, at least one power supply, and at least one plasma exciter. The axial suspension plate is provided with at least one plasma exciter, under the action of the excitation voltage provided by the power supply, the plasma-induced flow can form a free jet at the edge of the axial suspension plate, thus eliminating the The dissipation of plasma-induced flow momentum by the wall boundary layer can effectively enhance the swirl intensity and stabilize combustion.

[0036] In order to make the object, technical solution and advantages of the present i...

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Abstract

The invention provides a plasma nozzle, the plasma nozzle comprises an outer cylinder, a middle cylinder, an axial suspending plate, at least one power supply and at least one plasma actuator, wherein the axial suspending plate is arranged between the outer cylinder and the middle cylinder; the power supply is used for providing excitation voltage for the plasma actuator; and the plasma actuator is arranged on the axial suspending plate and is used for generating plasma under the function of the excitation voltage. According to the invention, the flowing induced by the plasma can form free jet on the edge of the axial suspending plate, so that the dissipation for flowing momentum induced by the plasma from a wall boundary layer is eliminated, the swirling intensity can be effectively enhanced, and the burning is stable.

Description

technical field [0001] The invention relates to the technical field of combustion devices, in particular to a plasma nozzle. 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 technology. Although these technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05H1/26F23R3/00
Inventor 李钢朱俊强杜薇徐纲卢新根张燕峰尹娟穆勇刘存喜
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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