A New Technique for the Grain Burnback Analysis In the Design of a Solid propellant Rocket Motor

摘要

Determination of the grain geometry is one of the critical steps during the design of a solid propellant rocket motor. A new technique is developed for the calculation of the evolution of the solid propellant grain geometry according to related burnback steps. In this technique, algorithms are developed for both boundary reconstruction and its movement. This new technique is based on the volume of fluid approach and algorithms for boundary reconstruction and its movement algorithms are added to the conventional cell fraction algorithms. The most important advantage of this technique is that a general computer code can be prepared in order to perform a burnback analysis for different grain configurations. It imposes no limitations on two-dimensional grain configurations. Therefore, the technique is introduced as a powerful tool when compared to present grain burnback methods. The technique is applied for the burnback of some conventional grain shapes.