A Synchronous Detection Method of Flow Field and Flame Structure

A flame structure, synchronous detection technology, applied in the measurement of phase influence characteristics, fluorescence/phosphorescence, material excitation analysis, etc., can solve the problem of unable to obtain flow field structure and flame structure at the same time, unable to explain the coupling process of flow and chemical reaction, etc.
CN104165865BActive Publication Date: 2017-01-18INST OF MECHANICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF MECHANICS - CHINESE ACAD OF SCI
Publication Date
2017-01-18

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Abstract

The invention discloses a synchronous detection method for flow field and flame structures of a hydrocarbon fuel during supersonic combustion. The method employs pulsed schlieren for detection of the flow field structure of a supersonic combustion field and CH-PLIF for detection of the flame structure of the supersonic combustion field. Detection focal planes of the pulsed schlieren and CH-PLIF are respectively focused onto a same detection area in a supersonic combustion chamber and the pulsed schlieren and CH-PLIF are synchronously controlled through a pulse synchronous generator so as to realize synchronous detection of the flow field and flame structures during supersonic combustion of the hydrocarbon fuel. The CH-PLIF image of flame structure without background noise of the combustion chamber is superposed with the schlieren image of the flow field structure so as to obtain a synchronous superposition image of the flow field and flame structures of a same instant during supersonic combustion of the hydrocarbon fuel. According to the invention, an experimental detection method for synchronous acquisition of information about flow field and flame structures in a combustion field at a same instant is provided for research on the interaction mechanism of flowing and chemical reactions during supersonic combustion of hydrocarbon fuels.
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Description

technical field

[0001] The invention relates to a method for synchronous detection of flow field and flame structure, in particular to a method for synchronous detection of flow field and flame structure used in the supersonic combustion process of hydrocarbon fuel. Background technique

[0002] The supersonic combustion flow field of hydrocarbon fuel is extremely complex, involving many complex phenomena such as shock wave / expansion wave system, chemical reaction, shear layer, large-scale separation flow and vortex flow, supersonic gas flow pressure propagation, and combustion flame propagation. A process in which flow and chemical reactions are highly coupled. Therefore, in-depth exploration of the supersonic combustion mechanism of hydrocarbon fuels requires a comprehensive study of the flow field, flame structure and interaction process of the supersonic combustion field.

[0003] For the supersonic combustion field of hydrocarbon fuel, at present, the flow field struct...

Claims

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