星孔药柱设计研究

STUDY OF INTERNAL STAR GRAIN DESIGN

关键词:  固体发动机  推进剂药柱  设计  内弹道学  计算

Key words:  Solid rocket moter  Propellant grain  Design  Interior balli- stic  Calculation

摘要:

推导了星孔药柱尾部装药和剩药燃面计算公式,提出了采用粗略内弹道计算优选药柱参数的设计方法,应用改进的一维准定常流动模型进行了精确内弹道计算,并与实验值进行了比较。计算结果和实验结果十分吻合,压强相对误差小于5％。本文提出的设计方法已成功应用于发动机设计中,大大减少了实验次数,节省了研制经费。本方法可适合于其它内孔燃烧发动机的装药设计。

Abstract:

In this paper the formulate for calculating burning surface of remanent grain or aft end grain is presented. A new design nethod for optimizing grain parameters by means of rough internal ballistic calculat ion is discribed.Accurate internal ballistic calculation is performed by one dimensional quasi-steady flow model. The calculation results of pressure agree with the measured results within 5 percent. The method has been successfully appliec to motor design and is apropriate to other internal burning grain motor design. Tne application of the method will reduce experiments greatly and save a lot of research funds.