【摘要】 基于被测区域内混合气体的声速和光谱积分吸收系数,提出声光融合同时重建温度场和浓度场的方法。以CO2-水蒸气-N2-O2混合气体为例,建立声波传播速度和光谱积分吸收系数模型,结合CT理论和所提出的融合方法,实现了燃烧区域内温度场和水蒸气浓度场的重建。仿真结果表明:该方法能够准确地重建被测区域的温度和浓度分布,且温度场重建结果较浓度场更精确;但测量噪声对温度场重建结果的影响较浓度场更大。更多还原

【Abstract】 Basing on acoustic velocity and spectrum integral absorption coefficient in a mixed gas within monitored areas,making use of acoustic-optic fusion method to reconstruct both temperature and concentration fields was proposed. Taking a CO2-water vapour-N2-O2 gas mixture as an example,the model for acoustic propagation velocity and spectrum integral absorption coefficient was established,including having CT theory and the proposed fusion method considered to reconstruct temperature field and water vapour concentration field. Simulation results show that this method can accurately reconstruct the distribution of both temperature and concentration of the monitored areas and the temperature field reconstructed outperforms the concentration field in accuracy as well as the measurement noise affects the temperature field reconstruction greater than does the concentration field.更多还原