火箭发动机喷流辐射场可视化

Visualization of Radiation Field of Rocket Engine's Exhaust Plume

喷流的红外辐射特性是火箭发动机的重要目标特性,喷流辐射场的可视化对于导弹的预警和探测识别有重要意义。首先,采用将矩形网格三角化的方法,对网格序列法和局部多边形填充法进行了改进,该算法将矩形网格分成4个三角形,然后在三角形内进行等值线的绘制和云图的填充。其次,介绍了3DS模型的文件格式,并编程实现了3DS模型的读取与重绘。最后,在VC++6.0下基于OpenGL编写了可视化软件,实现了火箭发动机喷流辐射场的等值线、云图的绘制并导入3DS格式的喷管模型结合显示,验证了算法的可行性。

The IR radiation characteristics of exhaust plume is an important target characteristic of rocket engine. Visualization of exhaust plume＇s radiation field has great significance to early warning and detection of missile. Firstly, the method of grid sequence and partial polygon fills is improved by dividing rectangle grid into triangles. This arithmetic divides rectangle into four triangles, and then draws isolines and fills nephogram inside the triangle. Secondly, this paper introduces the file format of 3DS models and programs to read and redraw them. Finally, the visualization software based on OpenGL and VC＋＋6.0 is written to draw the isoline and nephogram of rocket exhaust plume＇s radiation field, and combine with the nozzle＇s 3DS model. That validates the feasibility of the algorithm.