Abstract
Tracer-free mixture-fraction measurements were demonstrated in a jet using femtosecond-laser electronic-excitation tagging. Measurements were conducted across a turbulent jet at several downstream locations both in a pure-nitrogen jet exiting into an air–nitrogen mixture and in a jet containing an air–nitrogen mixture exiting into pure nitrogen. The signal was calibrated with known concentrations of oxygen in nitrogen. The spatial resolution of the measurement was . The measurement uncertainty ranged from 5% to 15%, depending on the mixture fraction and location within the beam, under constant temperature and pressure conditions. The measurements agree with a mixture fraction of unity within the potential core of the jet and transition to the self-similar region.
© 2017 Optical Society of America
Full Article | PDF ArticleMore Like This
Colter Russell, Naibo Jiang, Paul Danehy, Zhili Zhang, and Sukesh Roy
Appl. Opt. 60(15) C121-C130 (2021)
Nicholas J. DeLuca, Richard B. Miles, Naibo Jiang, Waruna D. Kulatilaka, Anil K. Patnaik, and James R. Gord
Appl. Opt. 56(31) 8632-8638 (2017)
Jordan M. Fisher, Terrence R. Meyer, and Mikhail N. Slipchenko
Appl. Opt. 60(34) 10714-10720 (2021)