Research on Application of Optical Pressure Measurement (OPM) Technology in Wind Tunnel

• 1、 Harbin Institute of Technology, Department of Electronic Science and Technology
• 2、 Harbin Institute of Technology, Space Optical Engineering Research Center
• 3、Harbin Institute of Technology, Space Optical Engineering Research Center

Abstract：In wind tunnel applications, there are two methods of pressure measurement .One is Arrays of Pressure Taps; the other is Optical Pressure Measurement. Arrays of pressure taps are usually used for measurement of surface pressure. This technique is expensive and time consuming since it requires a lengthy and complex preparation of the model. Furthermore, pressure values are only obtained at a discrete number of points, which limits the resolution of the pressure measurement. Compared to the classic pressure tap technique, fluorescent pressure sensitive paint (PSP) offers a non intrusive alternative with the advantage of an easier implementation, lower cost and increased spatial resolution. With PSP, an entire three-dimensional map of the model surface pressure can be acquired optically. Flow structures that are usually missed by the low spatial resolution of pressure tap arrays may now be easily visualized. This paper presents a introduction of Optical Pressure Measurement and its core technology—Pressure Sensitive Paint Technique in detail. Finally this paper puts forward creatively new design principles of lighting and detection system.

Keywords： Optical Pressure Measurement, Pressure Sensitive Paint, Lighting and Detection Schemes, Wind Tunnel Self Illumination