Zhang Dayuan, Gao Qiang, Li Bo, Liu Jixu, Tian Yifu, Li Zhongshan
Appl Opt. 2019 Oct 1;58(28):7810-7816. doi: 10.1364/AO.58.007810.
Ammonia (NH) is a sustainable fuel with excellent emission characteristics. Hence, it is important to develop diagnostic techniques for NH combustion. In this paper, femtosecond laser-induced plasma spectroscopy (FLIPS) was performed in premixed NH/air flames. The plasma emission spectra induced by the femtosecond laser in the flame and the chemiluminescence spectra of the flame itself were both measured. Through calibration, we found that the spectral intensity ratio of NH (336 nm)/N (337 nm) could be used for equivalence ratio measurements in NH combustion flow fields. This work is the first attempt at using a femtosecond laser-based technique for NH combustion diagnostics.
氨（NH₃）是一种具有优异排放特性的可持续燃料。因此，开发用于氨燃烧的诊断技术很重要。在本文中，在预混氨/空气火焰中进行了飞秒激光诱导等离子体光谱（FLIPS）实验。测量了飞秒激光在火焰中诱导产生的等离子体发射光谱以及火焰本身的化学发光光谱。通过校准，我们发现氨（336 nm）/氮（337 nm）的光谱强度比可用于氨燃烧流场中的当量比测量。这项工作是首次尝试使用基于飞秒激光的技术进行氨燃烧诊断。
