星孔装药燃面退移图形显示研究

STUDY ON GRAPHIC DISPLAY OF BURNING SURFACE REGRESSION FOR STAR PERFORATION GRAIN

关键词:  计算机仿真  计算机图形学  固体推进剂火箭发动机  星孔药柱  推进剂燃烧

Key words:  Computer simulation  Computer graphics  Solid propellant rocket engine  Star grain  Propellant combustion

摘要:

应用计算机图形学在ＩＢＭ－ＰＣ机上开发了星孔装药燃面退移仿真的图形显示系统。该系统的功能包括：参数曲线的图形显示，装药横截面的二维及装药燃面的三维静态显示，模拟燃面退移的二维动态显示。详细讨论了用直线和圆弧构成装药横截面的二维图形的显示方法及相应的参数和控制点的计算，燃面上三维型值点的计算及图形显示方法，利用三次均匀Ｂ样条和双三次均匀Ｂ样条构造曲线和曲面的方法。

Abstract:

A graphic display system of emulation with the burning surface regression of the star perforation grain on IBM-PC/XT microcomputer is developed. This system has many functions including parametric curves’ display, static displays of grain’s 2-D cross section and 3-D burning surface, 2-D dynamic simulation display of the burning surface regression and so on. The methods for displaying the graphics of grain’s 3-D burning surface and 2-D cross section consisting of lines and arcs are studied in detail. And the paper also gives the calculations of the relevant parameters and control points on the burning surfaces. The methods for constructing curves and curved surface, with cubic uniform B-spline and bicubic uniform B-spline are discussed.