Advancements in High-Speed Combustion and Propulsion Systems

Dear Colleagues,

Since the 1940s, much effort has been made in studying different types of rockets and airbreathing propulsion systems that can provide high-speed long-range flight capabilities in both low and high Mach number conditions. The development of new propulsion systems has been motivated by higher efficiency, lower emission, and lower cost for space access and high-speed transportation. New combustion devices, such as scramjets and detonation engines, are being developed to accommodate near-limit operational conditions in a variety of commercial and defense systems, such as fast long-range aircraft, affordable and reusable space access systems, and advanced weapon systems for global strike and reconnaissance. These propulsion systems have non-premixed, partially premixed, and shock-induced combustion methods, physical/aerodynamic devices for enhancing fuel-air mixing efficiency, modified chemical kinetics for expanding combustion flammability limit, and optimized flow path design for reducing overall irreversibility. Advanced propellants provide increased performance in terms of the specific impulse, combustion stability, and flight envelope.

The development of experimental techniques and exa-scale computing capabilities for advanced propulsion system design, and new propellants for more energy-efficient, more climate-friendly power/thermal units are critical in the rapid evolution of next-generation advanced propulsion systems. This Special Issue will address the most recent achievements in the development of advanced high-speed propulsion systems.

The topics of interest include but are not limited to:

• Numerical analysis of advance propulsion systems;
• Advanced experimental measurements on flow and combustion dynamics;
• Fuel-air mixing methods in high-speed flows;
• Flame-holding strategies in high-speed flows;
• Pressure-gain combustion;
• Thermodynamic modeling on combined cycle engine systems;
• Novel propellants for ramjet/scramjet propulsion.

Dr. Dan Michaels
Dr. Qili Liu
Guest Editors

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