Du Wei, Wen Daxin, Ma Liuhao, Wang Yu
Appl Opt. 2022 Oct 1;61(28):8341-8353. doi: 10.1364/AO.469624.
A hybrid constraint spectral thermometry (HCST) method based on combined light extinction and spectral soot emission was developed for temperature measurements in sooting flames. Light extinction measurements were performed in the 635-1064 nm spectral range to constrain the fitting of the soot optical property () as a function of the wavelength for separately measured spectral emission data. This hybrid constraint methodology helps to avoid complete reliance on either measurement, which significantly increases the immunity of the temperature determination to measurement noises. After numerically validating the performance of HCST, measurements were performed for a series of representative sooting premixed flames. Additional measurements were conducted with the proven tunable diode laser absorption technique to provide a reference temperature, and satisfactory agreements demonstrate the accuracy and robustness of the proposed HCST method.
基于消光和光谱烟尘发射相结合的混合约束光谱测温法（HCST）被开发用于测量有烟火焰中的温度。在635 - 1064 nm光谱范围内进行消光测量，以约束烟尘光学特性（）作为波长的函数对单独测量的光谱发射数据进行拟合。这种混合约束方法有助于避免完全依赖任何一种测量，从而显著提高温度测定对测量噪声的抗干扰能力。在对HCST的性能进行数值验证后，对一系列具有代表性的有烟预混火焰进行了测量。使用经过验证的可调谐二极管激光吸收技术进行了额外的测量以提供参考温度，令人满意的一致性证明了所提出的HCST方法的准确性和稳健性。
