Hybrid Rocket Propulsion System

Dear Colleagues,

The field of hybrid rocket propulsion has seen a resurgence in recent years, largely due to its inherent advantages in simple throttleability, safety, cost-effectiveness, and environmental friendliness. These systems, which utilize propellants from different phases (typically a solid fuel and a liquid or gaseous oxidizer), offer a compelling alternative to traditional solid and liquid rocket engines. Despite their promise, the uncontrollable nature of solid fuels and the interdisciplinary nature of hybrid rockets present significant research challenges. These include the intricate coupling of internal ballistics, combustion phenomena, heat transfer, and fluid dynamics, as well as the need for advanced material and structural design.

This Special Issue aims to bring together the latest advancements in the theory, modeling, design, and testing of hybrid rocket propulsion systems. We are particularly interested in papers that address the fundamental challenges associated with transient combustion, fuel regression rate prediction, combustion instability, scale-up effects, and applications in real cases. Additionally, contributions on innovative fuel–oxidizer combinations, advanced manufacturing techniques like additive manufacturing, and the development of throttling and thrust vector control systems for a hybrid rocket system are highly encouraged. The goal is to highlight cutting-edge research that pushes the boundaries of this technology, paving the way for its broader application in launch vehicles, in-space propulsion, and educational platforms.

Prof. Dr. Jongshinn Wu
Dr. Shisin Wei
Guest Editors

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