金属燃料及其在冲压发动机中的应用综述OA

Metal fuels,with their high energy density,show significant advantages in improving engine specific im-pulse and thrust,and have become a frontier in propulsion technology research.This paper reviews the characteris-tics,fuel forms,and the progress in the application of metal fuels in ramjet engines.The physicochemical characteris-tics and energy performance of common metal fuels such as lithium,beryllium,boron,magnesium,and aluminum are analyzed.The working mechanisms,performance characteristics,and advantages and disadvantages of the pill-type and powder-type metal fuel forms are compared.This paper focuses on summarizing the application of metal fu-els in air ramjet engines,water ramjet engines,and cross-medium engines.The test and numerical simulation results of combustion organization,flow field optimization,and performance enhancement from both domestic and interna-tional research are classified and summarized.Furthermore,the current technical challenges are revealed.A sum-mary and outlook on the key technical challenges in the combustion organization of metal fuel engines are presented.This provides reference for future research and engineering applications of metal fuels.