摘  要

本次的试验就是测量旋成体机身表面的压强分布，绘制压力曲线，采用SHFD低温风洞对旋转体机身进行吹风试验。分别完成其纵向实验和横向实验，通过压力扫描系统可以在计算机中得到旋转体机身表面各截面上测压口的压力。通过计算可以得到其压力系数，最后通过MATLAB软件即可画出各个截面的压力分布情况以及上下子午线的压力分布情况。

关键词：旋成体机身；低温风洞；风洞试验；MATLAB

Abstract

This experiment is to measure the pressure distribution on the surface of the rotating body, draw the pressure curve, and use the SHFD low temperature wind tunnel to carry out the blowing test on the rotating body fuselage. The longitudinal and transverse experiments were carried out respectively, and the pressure of each cross section on the surface of the rotating body could be obtained by the pressure scanning system in the computer. The pressure coefficient can be obtained by calculation. Finally, the pressure distribution of each section and the pressure distribution of the upper and lower meridians can be drawn by MATLAB software.

Keywords: spinning body fuselage; low temperature wind tunnel; wind tunnel test MATLAB

                        目  录

第一章 实验名称及要求1

第二章 实验设备2

2.1 风洞主要几何参数2

2.2 风洞动力系统2

2.3 控制和数据采集系统2

2.4 压力扫描系统3

2.5风洞流场的主要技术指标4

2.6 试验模型4

第三章 实验原理8

3.1风洞实验原理8

   3.1.1 相对性原理和相似准则8

   3.1.2 主要测量过程8

    3.2测压实验原理9

第四章 实验方法及步骤11

4.1 实验准备11

4.2计算雷偌数11

4.3分配任务12

4.4 实验过程12

第五章 实验数据处理13

5.1 实验数据修正计算13

5.2 纵向和横向实验曲线图及分析14

结论21

参考文献22

附录23