@article{ZHOU2023, 
author = {Yaozhi ZHOU and Zun CAI and Qinglian LI and Chenyang LI and Mingbo SUN and Shaotian GONG},
title = {Characteristics of penetration and distribution of a liquid jet in a divergent cavity-based combustor},
year = {2023},
journal = {Chinese Journal of Aeronautics},
volume = {36},
number = {12},
pages = {139-150},
keywords = {Atomization, Liquid fuels, Spray nozzles, Supersonic flow, Two-phase flow},
url = {https://www.sciopen.com/article/10.1016/j.cja.2023.03.006},
doi = {10.1016/j.cja.2023.03.006},
abstract = {The atomization process of a liquid jet in a divergent cavity-based combustor was investigated experimentally using high-speed photography and schlieren techniques under a Mach number 2.0 supersonic crossflow. Gas-liquid flow field was studied at different divergent angles and injection schemes. It is found that complex wave structures exist in the divergent cavity-based combustor. The spray field can be divided into three distinct zones: surface wave-dominated breakup zone, rapid atomization zone and cavity mixing zone. A dimensionless spray factor is defined to describe the concentration of spray inside the cavity qualitatively. As a result, it is revealed that for the large divergent angle cavity, the injection scheme near the upstream inlet has a higher penetration depth but a lower spray distribution, where the injection scheme near the cavity has a more spray distribution. For the small divergent angle cavity, the injection scheme near the upstream inlet also has a higher penetration depth and the injection scheme near the start point of the divergent section has a more sufficient spray distribution. The small divergent angle cavity-based combustor with the upstream wall transverse injection is an optimized injection scheme to improve both penetration and spray distribution inside the cavity. Finally, a penetration depth formula is proposed to explain the spray and distribution behaviors in the divergent cavity-based combustor.}
}