A Laser Absorption Spectroscopy Tomography Imaging System for Axisymmetric Combustion Field Monitoring

Abstract

The present invention designs a laser absorption spectrum tomography system for monitoring an axisymmetric combustion field. The components used include: a laser light source, a scanning galvanometer, an optical fiber bundle, an integrating sphere, a photoelectric detector, and a data acquisition module; among them, The laser light source shines on the scanning galvanometer, passes through the measured combustion field after being reflected by the scanning galvanometer, and irradiates onto the fiber bundle. An integrating sphere is placed at the exit of the fiber bundle, and a photodetector is placed at the exit of the integrating sphere to receive the signal. The acquisition module collects the spectral absorption data after the laser passes through the measured combustion field, and obtains the temperature distribution and concentration distribution of the combustion field in the measurement area through calculation. The invention has simple structure and convenient operation, and has high use value and wide application prospect in the field of combustion diagnosis.

Description

(1) Technical field [0001] The invention relates to a laser absorption spectrum tomography imaging system for monitoring an axisymmetric combustion field, which is applied in the technical field of combustion diagnosis. (2) Background technology [0002] Axisymmetric combustion fields widely exist in industrial production, scientific research and other fields. Accurate measurement of the temperature and component concentration of axisymmetric combustion fields is of great significance for optimizing burner design, improving combustion efficiency, and reducing pollution emissions. For this reason, researchers have proposed a series of measurement methods, which are mainly divided into two types: contact measurement and non-contact measurement: contact methods mainly include thermocouple method, gas analysis method, etc. However, these methods have poor real-time performance and damage to the flow field. Disadvantages: Non-contact methods are mainly optical measurement methods...

AI Technical Summary

Problems solved by technology

However, there are some problems in the above methods, such as, placing the burner on the displacement platform will affect the stability of the flame; the use of the rotating platform and the mirror makes the optical structure complex and the scanning speed is slow; the detector array is limited due to the limited number of detectors. Therefore, the spatial resolution is not high

Images