Spray and Splash Dynamics of an Advanced Flow-Independent Fuel Injector for Naval Propulsion
Abstract
The performance and limitations of Naval warfighter engine systems are severely influenced by the liquid fuel injection spray dynamics. The characteristics of the fuel spray in terms of liquid fuel injection, jet break-up, atomization, and mixing are critical for efficient combustion and propulsion performance. The performance of the fuel injection spray is sensitive to the engine operating condition resulting in varying fuel placement over the operating envelope. This can lead to sub-optimal fueling and combustion stability issues for engines. Furthermore, jet fuels and alternatives can have significantly different physical properties, may therefore exacerbate fuel placement issues. Generally, these systems inject liquid sprays from small diameter orifices at highReynolds and Weber number regimes. This results in a turbulent dense spray environment that is extremely complex. The multi-phase liquid jet fuel interaction with the varying crossflow is extreme difficult due to the varying conditions of the fueling level and the engine operating conditions that drives the crossflow. Advanced Flow-Independent (FI) fuel injection is needed toneutralize turbulent fuel spray deposition in an engine independent of the engine operating load condition. Augmenting the understanding of flow-independent fuel injection characteristics through advance optical diagnostic techniques will pave the path for improved Navy combustion based propulsion and power systems in terms of enhanced efficiency, broadened operating limits,and improved performance.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 17, 2020
- Source ID
- N000142012555
Entities
People
- Kareem Ahmed
Organizations
- Office of Naval Research
- United States Navy
- University of Central Florida Board of Trustees