Japan Aerospace Exploration Agency Wind Tunnel Technology Center, Institute of Aerospace Technology
Japan Aerospace Exploration Agency Wind Tunnel Technology Center, Institute of Aerospace Technology
Japan Aerospace Exploration Agency Wind Tunnel Technology Center, Institute of Aerospace Technology
Japan Aerospace Exploration Agency Wind Tunnel Technology Center, Institute of Aerospace Technology
Japan Aerospace Exploration Agency Wind Tunnel Technology Center, Institute of Aerospace Technology
IHI Aerospace Engineering Co. Ltd.
A Pressure-Sensitive Paint (PSP) measurement system has been developed in the large-scale wind tunnels of the Wind Tunnel Technology Center (WINTEC). PSP technique provides a simple and inexpensive way to obtain overall pressure images on an aerodynamic model surface with high spatial resolution. However, the luminescent intensity of PSP depends on both pressure and temperature. Therefore, temperature correction of PSP should be conducted to increase measurement accuracy. For our present PSP system, a PSP/Temperature-Sensitive Paint (TSP) combined system is used for temperature correction. When the PSP/TSP combined system is applied, the flowfield on both right and left wings of a model should be identical. Accordingly, the system cannot acquire pressure images on a model at sideslip angles. A half-model is also inapplicable, because it is not a symmetric configuration. To solve these problems, a PSP system combined with an Infrared (IR) camera was developed. This technique could acquire pressure images without the limitations mentioned above. The PSP/IR combined system was applied to 2 m x 2 m low-speed wind tunnel for verification purposes because measurement accuracy of low-speed PSP is acutely sensitive to error due to the temperature dependence of PSP. It was found that a PSP system with an IR camera could improve measurement accuracy compared with the conventional PSP technique, verifying that this temperature correction method is a useful technique for low-speed testing.
赤外線カメラを利用した感圧塗料温度補正法の研究:低速流れへの適用
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