Two-dimensional laser Raman scattering spectrometry system

Abstract

The invention discloses a two-dimensional laser Raman scattering spectrometry system and belongs to the technical field of laser combustion diagnosis. A Raman spectroscopic imaging system, an industrial computer, a surface focusing laser system, a laser collector and a pulse delay generator are disposed on the same optical platform. The surface focusing laser system is arranged on the right side of a focusing excitation area and a laser collector is placed on the left side of the focusing excitation area. A synchronous output port I of a pulse delay generator is connected to an external trigger input port of a Raman ICCD camera. A synchronous output port II is connected to a pumping lamp external trigger input port of the laser controller. A trigger output port of the Raman ICCD camera isconnected to a Q switch external trigger input port of the laser controller. A data output port of the Raman ICCD camera is connected to a data input port of a Raman ICCD camera capture card. A laseremitter is connected to the laser controller through a special cable. The system realizes synchronous quantitative measurement of the multiple mole fractions and temperatures in the two-dimensional space of the combustion field.

Description

technical field [0001] The invention belongs to the technical field of laser combustion diagnosis, and in particular relates to a two-dimensional laser Raman scattering spectrum measurement system. Background technique [0002] Efficient, clean and safe combustion is one of the important research topics for human beings. Whether it is combustion in engines (including aerospace engines, transportation engines, etc.), coal systems for power supply and heating, and gas turbines, or in various burners for basic research, various advanced combustion diagnostic technologies are required Means to explore ways and methods to further improve combustion conditions. Due to the closedness, transientness, and harshness of explosion of some combustion systems, people generally use various laser combustion diagnosis techniques to detect the combustion process. Through these technologies, the combustion state of the combustion field can be directly observed, and the precise measurement of...

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Problems solved by technology

First of all, there is the problem of low measurement efficiency, and secondly, it is difficult to ensure the equal distance between points or between lines or between surfaces, which also causes the problem of non-real-time measurement, that is, the problem of asynchronous measurement information of the combustion field

It is difficult to compare the deviation in the spatial and temporal resolution obtained by this optical measurement method with the calculation results of numerical simulation.

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