C208 単純自動車形状まわりの流れの感圧塗料による可視化計測

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  • PSP Measurement of the Flow around a Simplified Car Model
  • タンジュン ジドウ シャケイジョウマワリ ノ ナガレ ノ カンアツ トリョウ ニ ヨル カシカ ケイソク

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In applying Pressure-Sensitive Paint (PSP) to low-speed wind tunnel testing, it is important to minimize the measurement uncertainties. There are various noise sources such as camera noise, misalignment of images due to model displacement, and temperature distribution over a model. Among these factors, we studied the effects of temperature distribution change during tests on pressure measurement accuracy. Pressure and temperature distributions over a simplified car model (Ahmed model) were measured using biluminophore paint. Sequential images were acquired at the same interval over the entire test period including the conditions before or after the tunnel run. As a result, it was found that, the most accurate result was obtained by ratioing wind-on image with the wind-off image having similar temperature distribution. In these cases, we could correct the effect of temperature distribution using a single-point measurement of model surface temperature.

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