New simulation method for 3D propellant grain burn analysis of solid rocket motor

This paper describes a new computer program (Regress-3D) to simulate the regression of complex 3D grain cavity and to calculate the burning surface area. It has a large region of applicability in solid rocket motor design and has made new improvements compared with other available codes. Users can easily and rapidly build their initial grain shapes and then obtain geometric information of design. Considering the calculated results, redesigning can be performed as desired until reaching at the satisfied result. Advantages and disadvantages of this method are also discussed.