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A staged combustor with stepped vortex-stabilized flame after airflow induction

A technology of rear step and combustion chamber, which is applied in the direction of combustion chamber, continuous combustion chamber, combustion method, etc., can solve problems such as complex mechanical structure, achieve simple geometric configuration, widen the range of working conditions, processing technology and simple mechanical installation. Effect

Active Publication Date: 2017-02-01
BEIHANG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] At present, the staged combustion chamber and the main combustion stage nozzle mainly use air atomizing nozzles, which use swirling air to atomize the fuel. The mechanical structure of this type of nozzle is relatively complicated.

Method used

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  • A staged combustor with stepped vortex-stabilized flame after airflow induction
  • A staged combustor with stepped vortex-stabilized flame after airflow induction
  • A staged combustor with stepped vortex-stabilized flame after airflow induction

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] Such as figure 1 As shown, the embodiment of the present invention is a staged combustor with an air flow induced rear step vortex stabilising flame, mainly composed of a main combustion stage flow channel 13, a rear step pre-combustion stage 12, a main combustion stage direct injection nozzle 6, a pre-combustion stage airflow The induced trapped vortex nozzle 11 is composed of an electric spark igniter 15 . The direct injection nozzle 6 of the main combustion stage is composed of a No. 1 oil inlet 24 , a No. 2 oil inlet 25 , an oil collecting chamber 7 and an injection hole 23 . The pre-combustion level airflow induced trapped vortex nozzle 11 has two independent gas collection chambers and two rows of nozzle holes, namely the nitrogen gas collection chamber 10 and the premix gas collection chamber 17 , and the nitrogen gas injection...

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Abstract

The invention discloses an airflow induction backward step standing vortex flame stabilization grading combustion chamber. A main combustion grade direct-jetting type nozzle is composed of a first oil inlet, a second oil inlet, an oil collection cavity and jetting holes. A pre-combustion grade airflow induction standing vortex nozzle is provided with two independent gas collection chambers and two rows of jetting holes for jetting nitrogen and premixed gas of methane / air. After entering the combustion chamber, air is divided and enters a main combustion grade flow channel and a pre-combustion grade premixing channel. Liquid fuel is jet through the main combustion grade direct-jetting type nozzle into the main combustion grade flow channel transversely and mixed with main combustion grade airflow. The premixed gas of methane / air and the nitrogen are jet obliquely upwards through the pre-combustion grade airflow induction standing vortex nozzle into a backward step pre-combustion grade part, so that a standing vortex is formed and used for stabilizing flames. An electric spark igniter is located on the jetting track of the premixed gas of methane / air and pre-combustion grade ignition start is achieved. A main combustion grade part is ignited through pre-combustion grade high-temperature fuel. By the adoption of the airflow induction backward step standing vortex flame stabilization grading combustion chamber, mechanical components are simple and reliable and the liquid fuel can efficiently and stably burn within a wider incoming flow working condition range.

Description

technical field [0001] The invention relates to a staged combustion chamber, in particular to a staged combustion chamber with step vortex-stabilized flame after airflow induction. Background technique [0002] Due to the pressure of global environmental pollution problems, higher requirements are put forward for the design of low-pollution combustors. Staged combustors are an important mode of low-pollution combustors. The staged combustion chamber can change the distribution ratio of fuel or air according to the change of engine power, so that it can be burned at the most suitable fuel-air ratio, thereby reducing pollutant emissions to the greatest extent. [0003] At present, the staged combustion chamber and the main combustion stage nozzle mainly use air atomizing nozzles, which use swirling air to atomize the fuel. The mechanical structure of this type of nozzle is relatively complicated. The combustion zone mainly uses the swirler to stabilize the flame, that is, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23R3/18
Inventor 赵永胜林宇震张弛程忆晗
Owner BEIHANG UNIV
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