Supersonic combustion in the inviscid stream has been
shown to reduce the base drag on a projectile. Fast reacting
fuel burned externally in the inviscid, supersonic flow generates
compression waves, which, when properly originated,
impinge on the recirculation bubble aft of the projectile
base and increase the base pressure. A free- jet wind tunnel
was constructed to study external burning where heat addition
was simulated by nozzle contour. Sufficient increase in base
pressure was attained to not only reduce base drag but also
provide thrust. Thus, external burning provides a method
for increasing the performance of projectiles.http://archive.org/details/basedragreductio00caswLieutenant junior grade, United States NavyApproved for public release; distribution is unlimited
