Abstract
To investigate the flash boiling fuel spray characteristics of the twin-orifice nozzle with aviation kerosene, a two-dimensional transparent slit nozzle is designed and studied under a wide range of superheated conditions. Both internal bubble development and near-nozzle jet atomization under subcooled and superheated conditions are studied via a high-speed camera with backlit measurement and image processing methods, accompanied with numerical simulation on in-nozzle two-phase flow for auxiliary analysis. The results indicate the expansion chamber of twin-orifice can increase the time for bubble nucleation and growth and enhance the bubble collision and aggregation. Also, under a higher superheat degree, the bubble volume fraction in the liquid-bubble interaction zone increases, and the bubbles exhausted from discharge-orifice can initiate from the interior to the edge of fuel jet at transitional flash boiling state. Furthermore, the bubble disruption occurs at the jet edge, which greatly enhances the atomization of fuel jet, leading to narrower liquid-core and wider spray distribution of near-nozzle fuel jet. In addition, the mechanisms of in-nozzle bubble development and near-nozzle spray atomization in the twin-orifice nozzle are concluded, which can be elucidated with more fundamental understanding of flash boiling fuel sprays.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
