Missile Solid Fuel Ramjet Engine Performance

As a kind of new-type ammunition, the SFRJ-projectile, which is greatly valued by the virtue of SFRJ's simple structure, high specific impulse and accommodating the gas flux itself, enormously improve the cannon-shot of the projectile. The SFRJ-projectile has very nice prospects.In this paper, fistly, the combustion and flow in solid fuel ramjet are analyzed, the physical model of the inlet and combustor within SFRJ are established. Secondly, on the base of the research on total pressure, flaming velocity,mass flow,mach numbers and total temperature, the ramjet's performance calculation model can be founded, then, a special computer program compiled is used to work out the ramjet's performance parameters, such as the thrust,fuel special impulse, and so on. Thirdly, on the side, the accurate location of the normal shock wave in inlet can also be found out by that computer program, and several kinds of pressure losses which affect the ramjet's performance badly are investigated, too. Finally, after analyzing the result datas, altitude characteristics, velocity characteristics & regulation characteristics of SFRJ would be known much clearly.In addition, at the back of this article, a trajectory model of the Added-range projectile using SFRJ is set up to compute the pill's locomotion track, and the characteristics of the thrust and drag during the projectile's flying time, some analysis in point are also listed.Actually, the conclusions and method of this paper is not only helpful to the research and manufacture of solid fuel ramjet projectile, but also can be used as a reference for the research of SFRJ-missile.