关键词: 固体推进剂火箭发动机;整体结构;特型喷管;喷管气流;实验

Abstract: The integrated stage concept(ISC) with forced deflection nozzle (FDN) is introduced first, the working process for this nozzle at different outlet pressures is analysed. The experiments include:1)The tests compared with the conventional nozzle. On the conditions of same throat areas and same exit areas, the thrusts of the two kinds of nozzles are measured, the results’that the total impulses of the two kinds of nozzles are equal approximately can confirm that the forced deflection nozzle is feasible;2) The pressure tests. Three points in the exit cone wall and one point in the plug base are taken to test the pressure variation in the working process. Through the analysis of the pressures, it is proved that the forced deflection nozzle has the ability to compensate the variation of environmental pressure automatically. At present, the tests are going on still, the numerical simulation will be carried out to get further understanding of the flowfield of the forced deflection nozzle.

Key words: Solid propellant rocket engine;Integrated structure;unconventional nozzle;Nozzle gas flow;Experimentation