Dear Colleagues,

Propulsion systems still receive much research attention, especially aircraft engines, rocket engines and scramjets, etc. Some new propulsion systems are proposed that combine two basic propulsion systems, such as RBCC and TBCC, as well as new types of propulsion systems, such as combined space–air–ocean systems and highly integrated power systems, which can allow aircraft to fly safely from areas over land to those over the ocean. Propulsion systems are developed with the features of a wide speed range and long endurance, both for civil aircraft and military applications. Studies of propulsion systems mainly address their overall design, combustion, aerodynamics, internal flow and heat transfer, etc. High efficiency is pursued not only by optimized design but also via the development of suitable materials as well as the usage of powdered fuel.

Along with the development of high-efficiency propulsion systems, thermal management technology is also developed to address the increased heat from external aerodynamic heating and internal combustion heat at high speeds. This thermal management technology can transfer excessive heat to other low-temperature regions or provide thermal protection for structures via blade cooling in gas turbines and regenerative cooling in rocket engines. The thermal protection of engines is highly efficient due to the enhancement of convective heat transfer, such as the usage of superficial fluids, nanofluids, or newly designed roughened surfaces. Additionally, some heat transfer enhancement methods in heat exchangers, batteries and fuel cells are implemented in propulsion systems.

This Special Issue focuses on bringing together innovative developments in the fields of advanced propulsion systems and thermal management technology. Potential topics include, but are not limited to:

• Propulsion system design;
• Heat transfer enhancement;
• Turbulent combustion;
• Supercritical fluid;
• Regenerative cooling;
• Flow control;
• Laser-based combustion diagnostics;
• Spray dynamics;
• Nanofluids;
• Blade cooling;
• Film cooling;
• Transpiration cooling;
• Multiphase flow;
• Heat transfer in propulsion system;
• Aerodynamics;
• Combustion instability;
• Powder fuel;
• Spray dynamics;
• Convective heat transfer;
• Supersonic vehicles;
• Thermal management in other fields.

Dr. Jian Liu
Prof. Dr. Bengt Sunden
Dr. Chaoyang Liu
Dr. Yiheng Tong
Guest Editors

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