EXTERNAL BURNING IN SUPERSONIC STREAMS
JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB
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Theoretical and experimental studies of heat addition to external supersonic streams are reviewed, following a brief explanation of the basic fluid mechanical model and possible applications of external burning. Previously developed methods and a new, simplified method for obtaining linearized heat addition solutions are presented. The numerous analyses of combustion via a stationary detonation wave are categorized into four models for planar heat addition, and the equations are developed for the most interesting case of the oblique Chapman-Jouget detonation. The governing equations for a constant-pressure analysis are developed, and performance estimates are given for heat addition adjacent to both double-wedge and flat-plate surfaces. Experimental results of all available external burning tests are discussed, including tests of two-dimensional and axisymmetric bodies. Data are compiled, summarized, and analyzed. The maximum expected pressure coefficient will be near that associated with a separated boundary layer. To obtain the theoretical maximum specific impulse, highly reactive fuels with a combustion length of a few feet will be required.
- Non-electrical Energy Conversion
- Jet and Gas Turbine Engines