A Study of Two Dimensional Tomography Reconstruction of Temperature and Gas Concentration in a Combustion Field Using TDLAS

Abstract

Based on tunable diode laser absorption spectroscopy (TDLAS), two-dimensional (2D) distribution reconstructions of gas concentration and temperature are realized using an algebraic reconstruction technique (ART). The influence of the beam distribution and grid size on combustion field reconstruction is investigated to attain optimal reconstruction results with a limited number of beams. Under limited optical-path numbers, it shows that a better spatial resolution is attainable only when the laser beam paths are vertical and parallel to the symmetry axis of the combustion field. Furthermore, experiments with 16 beam paths using one and two flat flame combustion fields are carried out in different fuel-air equivalence ratios under room temperature. The results are in agreement with the simulation results, and the time resolution is less than 1 s.

Identification and Control Method of Temperature and Pressure Control System in Methane Isotope Measurement System

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Two-Dimensional Reconstruction of Heat Transfer in Surface Combustion of Flat Flame Furnace Guided by Tdlas Technology

“…In the combustion process, temperature and gas component concentration are essential parameters to analyze the combustion state and chemical reaction process. Among them, temperature represents the amount of heat, the energy released in the combustion process the efficiency, and component concentration represents whether the fuel composition and combustion are completed [2]. To improve combustion efficiency and control pollution emissions, it is necessary to measure the proper distribution of temperature concentration and other flow field parameters in the combustion process [3].…”

Similarity Analysis for Time Series-Based 2D Temperature Measurement of Engine Exhaust Gas in TDLAT

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