U.S. Air Force Fact Sheet AFRL/RZA (AEROSPACE PROPULSION DIVISION) AFRL/RZA (Aerospace Propulsion Division) Phone: (937) 255-5221      DSN: (785)  This division initiates, plans, and conducts research and development programs in advanced airbreathing engine science and technology and promotes application of these technologies to military systems for a true Aerospace Force. Emphasis is on developing high-speed engine concepts and merging discrete propulsion cycles into combined cycle engines that work over a very broad flight regime, extending from sea level takeoff to hypersonic velocities. Such engine cycles are enabling for military space operations missions and high speed global reach missions. Coordinates and participates in joint propulsion science and technology programs with other AFMC, Air Force, and DoD organizations; NASA; other government agencies; other countries; and academia. AFRL/RZAS (Propulsion Sciences Branch)  Phone: (937) 255-7328      DSN: (785)  This branch plans, formulates, and conducts air-breathing engine research and development applicable to high-speed propulsion systems. It formulates and executes programs to improve computational models (fluid dynamics and structural mechanics), advanced experimental measurement techniques, and fundamental knowledge of combustion phenomena in high-speed environments. The branch develops, assesses, and verifies technical feasibility of innovative propulsion concepts to include ramjets, scramjets, and combined cycle engines. Within the context of high speed propulsion systems, it conducts fundamental studies in areas such as turbulence, shock-boundary layer interaction, fuel atomization, fuel-air mixing, flame stability, and emissions.  AFRL/RZAT (Propulsion Technology Branch)  Phone: (937) 255-7294      DSN: (785)  This branch conceives, plans, and executes applied research and advanced technology development programs that address high speed engine concepts. It establishes cooperative relationships with other governmental agencies, foreign and domestic, and cooperative and contractual agreements with the aerospace industry for the purpose of studying and developing high speed propulsion systems and combined-cycle engines. It also employs modeling and simulation for concept definition and assessment, and to develop advocacy for the divisions programs. While focused on external relationships and contracts, the branch works with the Propulsion Sciences Branch to leverage in-house research programs and enhance external programs.