Method of Comparative Analysis of Highly Dispersed Condensed Fuel Combustion Efficiency in Arbitrary Geometry Solid Propellant Ramjet Burners

• Main Author: A. V. Voroneckii
• Format: Article
• Language: Russian
• Published: MGTU im. N.È. Baumana 2016-01-01
• Series: Nauka i Obrazovanie
• Subjects: solid propellant ramjet; highly metalized solid propellant; condensed fuel particles; law of combustion; mathematical modeling
• Online Access: http://technomag.edu.ru/jour/article/view/71

The paper deals with various theoretical approaches to the mathematical modeling of the operating process in solid propellant ramjets (SPRJ) that use highly metalized solid propellant. It introduces a new method (combustion operating law method) that allows us to carry out comparative analysis of combustion efficiency in SPRJ arbitrary geometry ram-burners (RB) when there is no accurate information on the combustion law of condensed fuel particles. To illustrate an application of the proposed method, mathematical modeling of the operating process was conducted for three SPRJ ram-burners with three different air intakes (AI), for which distribution fields of main parameters of gas and fuel particles have been obtained. Most complete combustion of fuel particles and the lowest level of particles buildup are registered for RB180 (180 degree angle between AIs). The results of a comparative analysis show that the relative (compared to RB180) efficiency of the particle burning process equals 0.64 and 0.6, respectively, for RB90 (90 degree angle between AIs) and RB60 (60 degree angle between AIs). The proposed method may be applied to solve the most difficult problems of mathematical modeling when the optimization development of the solid propellant and ramjet structure are fulfilled simultaneously, i.e. when designers do not have the complete information about the combustion law of the condensed fuel particles.