Cylindrical rocket propellant charge blocks - with central branched and eccentric axially directed channels

摘要

Propellant block, esp. for rocket propulsion, with internal combustion, of cylindrical exterior comprising, in known manner, a peripheral ring with (n) distint partitions, each with two points of connexion to the ring, and a series of channels with walls parallel to the axis of the block and with a contour such as to provide a relative combustion thickness (e) e/r of 0.05-0.25, but in which the partitions delimit (i) a central branched channel enclosed between all the partitions and the outer ring and (ii) (n) eccentric channels each situated between one face of a single partition and the corresponding part of the peripheral ring, (where (e) is combustion thickness of the block and (R) the radius of the cylindrical block). Block gives an improved approach to the requirements for a rocket propellant charge i.e. (a) minimum variation of combustion surface to provide constant thrust throughout the rocket trajectory, (b) max. rates of propellant charge to volume occupied, and (c) min. unconsumed matl. in the period of normal rocket operation e.g. if the combustion surface has fallen to less than half.