Method and system for simultaneous measurement of temperature and components of aeroengine exhaust

Abstract

The invention discloses a method and system for simultaneous measurement of temperature and components of aeroengine exhaust. The method comprises the steps that a laser emitting module emits a firstlaser that is strongly absorbed by components to be measured; the first laser is concentrated into a second laser through a laser combining and convergence module, and the second laser enters an aeroengine exhaust detection area to be absorbed by the components to be measured; a third laser remaining after the absorption is separated into a fourth laser by a wavelength dividing module, and then aphotoelectric processing module photoelectrically converts the fourth laser and extracts second harmonic signals and incident light intensity signals; finally the obtained are analyzed by a data acquisition and analysis module, and the temperature of the aeroengine exhaust and the concentration of the components to be measured are inverted based on a TDLAS technology. According to the method and system, parameters such as temperature and component concentration can be simultaneously measured, and the method and system has the advantages of non-contact and real-time online measurement.

Description

technical field [0001] The invention relates to the field of non-contact gas measurement, in particular to a method and system for simultaneously measuring the temperature and components of an aero-engine exhaust gas. Background technique [0002] The traditional temperature measurement method can make the measurement inaccurate because the probe interferes with the flow field, causes the shock wave to destroy the flow field, or because of the catalytic effect of the probe. Therefore, some non-contact measurement methods are generally used for measurement. The non-contact method has no special requirements on the heat resistance of the sensor, avoids the mutual interference between the sensor and the measured target, has a large temperature measurement range, no thermal inertia, and has a fast response speed. It can measure the temperature of tiny targets and meet the temperature requirements of many occasions. Measuring range and accuracy requirements. Commonly used non-c...

AI Technical Summary

Problems solved by technology

[0005] The invention solves the shortcoming that the existing measurement technology cannot simultaneously measure multiple parameters and multiple variables, and provides a non-contact, low-cost, and simple-structure method and system for simultaneously measuring the temperature and component concentration of the exhaust gas of an aeroengine

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