發(fā)布時(shí)間：2019-06-10 01:57

【摘要】：基于波長調(diào)制光譜方法,研究了一種實(shí)現(xiàn)非均勻燃燒場氣體參數(shù)二維分布測量的新方法。氣體參數(shù)的二維分布是通過測量激光穿過非均勻流場區(qū)域的積分吸光度并結(jié)合重建算法進(jìn)行反演實(shí)現(xiàn)。研究了基于波長調(diào)制光譜,通過擬合諧波信號實(shí)現(xiàn)積分吸光度測量的方法。利用所選的7185.60cm~(-1)和7454.45cm~(-1)兩條H_2O譜線,通過建立離散模型和設(shè)計(jì)光線布局,基于波長調(diào)制光譜方法和代數(shù)迭代重建算法實(shí)現(xiàn)了非均勻流場區(qū)域內(nèi)溫度場和H_2O組分濃度場的二維分布測量。重建結(jié)果表明:基于波長調(diào)制光譜的二維重建方法具有較高的重建精度,與預(yù)測值相比,溫度和H_2O組分濃度的重建誤差分別小于1.69%和3.05%。
[Abstract]:Based on wavelength modulation spectroscopy, a new method for measuring the two-dimensional distribution of gas parameters in non-uniform combustion field is studied. The two-dimensional distribution of gas parameters is realized by measuring the integral absorbance of laser through the non-uniform flow field and combining with the reconstruction algorithm. The method of integral absorbance measurement based on wavelength modulation spectrum and harmonic signal fitting is studied. Using the selected 7185.60 cm ~ (- 1) and 7454.45 cm ~ (- 1) H 鈮，

本文編號：2496079