红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2014年
8期
2460-2465
,共6页
宋俊玲%洪延姬%王广宇%潘虎
宋俊玲%洪延姬%王廣宇%潘虎
송준령%홍연희%왕엄우%반호
激光吸收光谱%温度场二维重建%代数迭代算法%光线数目%虚拟光线法
激光吸收光譜%溫度場二維重建%代數迭代算法%光線數目%虛擬光線法
격광흡수광보%온도장이유중건%대수질대산법%광선수목%허의광선법
laser absorption spectroscopy%two-dimensional temperature field reconstruction%algebraic reconstruction technique%beam number%virtual beam method
基于可调谐半导体激光吸收光谱(TDLAS)技术采用代数迭代算法实现燃烧场温度二维重建。在有限入射光线数目下为获得最佳重建结果，研究了扇形光束和平行光束分布下光线数目、网格数目对温度场重建结果的影响规律。提出虚拟光线方法，通过在相邻光线间增加虚拟光线，减小网格间距以增加网格数目，满足在光线数目较少情况下，实现了较为细致的二维温度场重建。计算结果表明当光线间距与网格间距比在0.6~1范围内时，重建温度场相对均方误差最小。在相同入射光线数目情况下，虚拟光线法可以有效降低重建温度场相对均方误差，提高重建二维温度场精确度。
基于可調諧半導體激光吸收光譜(TDLAS)技術採用代數迭代算法實現燃燒場溫度二維重建。在有限入射光線數目下為穫得最佳重建結果，研究瞭扇形光束和平行光束分佈下光線數目、網格數目對溫度場重建結果的影響規律。提齣虛擬光線方法，通過在相鄰光線間增加虛擬光線，減小網格間距以增加網格數目，滿足在光線數目較少情況下，實現瞭較為細緻的二維溫度場重建。計算結果錶明噹光線間距與網格間距比在0.6~1範圍內時，重建溫度場相對均方誤差最小。在相同入射光線數目情況下，虛擬光線法可以有效降低重建溫度場相對均方誤差，提高重建二維溫度場精確度。
기우가조해반도체격광흡수광보(TDLAS)기술채용대수질대산법실현연소장온도이유중건。재유한입사광선수목하위획득최가중건결과，연구료선형광속화평행광속분포하광선수목、망격수목대온도장중건결과적영향규률。제출허의광선방법，통과재상린광선간증가허의광선，감소망격간거이증가망격수목，만족재광선수목교소정황하，실현료교위세치적이유온도장중건。계산결과표명당광선간거여망격간거비재0.6~1범위내시，중건온도장상대균방오차최소。재상동입사광선수목정황하，허의광선법가이유효강저중건온도장상대균방오차，제고중건이유온도장정학도。
Based on tunable diode laser absorption spectroscopy technique, two-dimensional temperature field in combustion was reconstructed using modified adaptive algebraic reconstruction technique (ART). Aimed at achieving an optimal reconstruction result with limited number of beams, the influence of the beam parameters and grid number on temperature field reconstruction was investigated. A virtual beam method with virtual beams added adjacent two beams and an increased number of grids was developed to describe the reconstructed temperature field in detail when the number of beams was limited. The simulation results indicate that the normalized mean absolute error is low when the ratio of beam spacing to the grid spacing was between 0.6 and 1. Compared with other methods, the normalized mean absolute error is significantly reduced using the virtual beam method.
