Mitigating Engine Unstart in Scramjets with Porous Bleeders

<p>The effectiveness of porous bleeders in mitigating unstart phenomena and enhancing isolator effectiveness in a hypersonic scramjet was investigated. Through computational fluid dynamics simulations, the impact of porous bleeder design parameters such as pressure jump coefficient and bleeder size on isolator effectiveness and unstart prevention was evaluated. Results indicated that porous bleeders delayed flow separation and reduced adverse pressure gradients, thereby enhancing isolator performance. Additionally, porous bleeders demonstrated promising capabilities in preventing full unstart events and mitigating oscillatory unstart phenomena.</p>

Name thesis:degree_name

Master of Science in Aerospace Engineering

Level thesis:degree_level

Thesis - Open Access

Discipline thesis:degree_discipline

Aerospace Engineering

Year

2024

Author dc:creator

• Lindley, Ryan

• Hypersonics
• CFD X-43
• scramjets
• porous bleeders
• Aerodynamics and Fluid Mechanics
• Aeronautical Vehicles
• Propulsion and Power

Repository record dc:identifier

https://commons.erau.edu/edt/813

OAI identifier oai:identifier

oai:commons.erau.edu:edt-1834