The invention discloses a test engine and a test method for
combustion of a double-base
system propellant in different overload directions, which successfully eliminate the influence of the overload directions on
combustion of the
propellant. The test engine comprises a
combustion chamber shell body, wherein the
combustion chamber shell body is provided with a blasting device, and a large-small dual-circular-step-shaped blasting sealing plug is installed on the blasting device and screwed up by means of a blasting cover; a spray
pipe is arranged in the middle of the
combustion chamber shell body, and high-strength
graphite is installed in a spray
pipe base and screwed up by means of a gland so as to prevent the
graphite from being sprayed out of a
graphite spray
throat in a test; and the
combustion chamber shell body takes the center of the spray
pipe as a symmetry axis, an end surface combustion
propellant charge and a fake grain are placed on the two sides, and the purpose of changing the overload directions is achieved through exchanging the positions of the propellant charge and the fake grain. In order to prevent the spray pipe from being blocked and the ignition
powder from being thrown out due to combustion of the charge under overload, the
celluloid box without residues after combustion is used for fixing the ignition
powder, thereby guaranteeing safety and reliabilityof the engine test under overload. The test engine and the test method is suitable for measuring and evaluating propellant charge combustion properties and internal ballistic trajectory performance indifferent overload directions.