Atomizing nozzle, nozzle array and combustor

A technology of atomizing nozzles and spray holes, applied in combustion chambers, combustion methods, combustion equipment, etc., can solve problems such as easy oscillation and unstable combustion, and achieve the effects of preventing flameout, enhancing combustion stability, and improving combustion performance

Active Publication Date: 2016-07-06
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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  • Atomizing nozzle, nozzle array and combustor
  • Atomizing nozzle, nozzle array and combustor
  • Atomizing nozzle, nozzle array and combustor

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Embodiment Construction

[0044] 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.

[0045] Such as Figure 1-4 As shown, the atomizing nozzle of the first embodiment of the present invention includes an inner cylinder 21, an outer cylinder 11, an M layer of atomizing wave swirler 31, and the M layer of atomizing wave swirler 31 is sandwiched between Between the inner cylinder 21 and the outer cylinder 11, they are arranged in sequence along the radial direction of the cylinder, between adjacent atomizing wave cyclones, between the innermost atomizing wave cyclone and the inner cylinder 21 M+1 layers of air flow channels are formed between the outermost atomizing wave cyclone and the outer cylinder 11, and the atomized fuel sprayed out by the atomizing wave cyclone is mixed with the air in the air flow ch...

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Abstract

The invention provides an atomizing nozzle, a nozzle array and a combustor. Fuel is atomized through an atomizing wave cyclone and is fully mixed with air, the combustion state is improved, the combustion stability is improved, the stable operation range is enlarged, the combustion efficiency is improved, and the effect of reducing pollutant emission is achieved. Due to an oblique flow channel, a low-speed area is generated near a center shaft of an outlet of the nozzle, the flame combustion rate and the rate of a reaction fluid flow field are balanced, and the phenomena of flameout and flame pulsation are avoided. Due to the adoption of a supporting cylinder, the fuel and air flowing speed can be more stable, the flow field is more stable, and the stability, completeness and efficiency of combustion can be further improved. The atomizing nozzle is switched between a diffusion combustion mode and a premixed combustion mode according to combustion conditions so as to be suitable for various working conditions and various kinds of fuel, and the combustion performance is greatly improved.

Description

technical field [0001] The invention relates to the technical field of combustion devices, in particular to an atomizing nozzle and a nozzle array, which are especially suitable for various industrial burners such as gas turbines, boilers and chemical furnaces. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/12
CPCF23R3/12
Inventor 李钢
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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