The recent interest in hypersonics has energized researchers, engineers, and scientists working in the field, and has brought into focus once again the need for adequate ground test capabilities to aid in the understanding of the complex physical phenomenon that accompany high-speed flight. Over the past decade, there have been noteworthy improvements in the worldwide hypersonic ground testing infrastructure that will be important in furthering hypersonic technologies. The current inventory of hypersonic testing facilities has been very successful, with few major failures or problems. Many of the enhancements highlighted have been driven by requirements for quiet tunnels for hypersonic boundary layer transition; long run times, high dynamic pressure, nearly clean air, true enthalpy, and larger-sized facilities for hypersonic and hypervelocity air breathers; and longer run times, high dynamic pressure/enthalpy facilities for sensor and maneuverability issues associated with interceptors. This book presents a number of new, innovative approaches to satisfying the enthalpy requirements for air-breathing hypersonic vehicles and planetary entry problems. It is divided into five parts: Introduction; Hypersonic Shock Tunnels; Long Duration Hypersonic Facilities; Ballistic Ranges, Sleds, and Tracks; and Advanced Technologies for Next Generation Facilities.
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