本文選題：光譜診斷 + 溫度測量�。� 參考：《光子學(xué)報》2017年S1期

【摘要】：為消除非共振背景干擾,提高相干反斯托克斯拉曼散射測量精度,研究了基于偏振探測的相干反斯托克斯拉曼散射非共振背景抑制與分離.首先,從理論上證明了相干反斯托克斯拉曼散射信號強度只取決于三階非線性極化率共振部分,而與非共振部分無關(guān),并且三階極化率共振部分與非共振部分偏振方向不一致,為偏振相干反斯托克斯拉曼散射提供了理論支撐;然后,以平面火焰爐溫度場為研究對象,設(shè)計了偏振相干反斯托克斯拉曼散射探測系統(tǒng)實施方案,并與熱電偶、常規(guī)相干反斯托克斯拉曼散射兩種方法在相同條件下開展了溫度測量對比實驗.實驗結(jié)果表明:常規(guī)相干反斯托克斯拉曼散射方法的測量相對誤差優(yōu)于7%,測量相對不確定度優(yōu)于7%;偏振相干反斯托克斯拉曼散射方法的測量相對誤差優(yōu)于4%,測量相對不確定度優(yōu)于5%;相同工況條件下與常規(guī)相干反斯托克斯拉曼散射相比,偏振相干反斯托克斯拉曼散射最接近均值的擬合光譜更加平滑.偏振相干反斯托克斯拉曼散射具有更小的擬合誤差,是一種更為有效的相干反斯托克斯拉曼散射診斷方法.
[Abstract]:In order to eliminate non-resonant background interference and improve the measurement accuracy of coherent anti-Stokes Raman scattering, the non-resonance background suppression and separation of coherent anti-Stokes Raman scattering based on polarization detection are studied. Firstly, it is proved theoretically that the intensity of coherent anti-Stokes Raman scattering signal depends only on the third order nonlinear polarizability resonance, but is independent of the non-resonance part, and the third order polarizability resonance part is not consistent with the non-resonant part polarization direction. It provides a theoretical support for polarization coherent anti-Stokes Raman scattering. Then, taking the temperature field of plane flame furnace as the research object, the scheme of polarization coherent anti-Stokes Raman scattering detection system is designed and compared with the thermocouple. The conventional coherent anti-Stokes Raman scattering method is used to compare the temperature measurements under the same conditions. The experimental results show that the relative error of the conventional coherent anti-Stokes Raman scattering method is better than that of the conventional anti-Stokes Raman scattering method, and the relative error of the conventional anti-Stokes Raman scattering method is better than that of the conventional anti-Stokes Raman scattering method. The relative uncertainty is better than 5. Compared with the conventional coherent anti-Stokes Raman scattering under the same operating conditions, The fitting spectra of polarization coherent anti-Stokes Raman scattering are smoother. Polarization coherent anti-Stokes Raman scattering has smaller fitting error and is a more effective diagnostic method for coherent anti-Stokes Raman scattering.
【作者單位】： 中國空氣動力研究與發(fā)展中心超高速空氣動力研究所高超聲速沖壓發(fā)動機技術(shù)重點實驗室;中國空氣動力研究與發(fā)展中心設(shè)備設(shè)計及測試技術(shù)研究所;
【基金】：國家自然科學(xué)基金(Nos.11272337,11272338) 高超聲速沖壓發(fā)動機技術(shù)重點實驗室開放基金(No.STS/MY-KFKT-2015001)資助~~
【分類號】：O657.37

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