Scanning Unsteady PSP Technique for High-Frequency and Small-Pressure Fluctuation in Low-Speed

Scanning Unsteady PSP Technique for High-Frequency and Small-Pressure Fluctuation in Low-Speed
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低速高频小压力波动扫描非定常PSP技术

DOI:
10.2514/6.2010-4920
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发表时间:
2010
影响因子:
8.4
通讯作者:
K. Nakakita
K. Nakakita
中科院分区:
化学1区
文献类型:
--
作者:
K. Nakakita

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采用低速非定常压敏漆(PSP)测量了NACA 0012二维模型的非定常压力场,该压力场伴随着约940 Hz的后缘噪声。在U=28.6 m/s时,最大压力波动约为150 Pa p-p。利用扫描式非定常PSP测量系统测量了模型上的非定常压力,并绘制了定量的非定常压力功率图。大的压力脉动位于后缘附近。尽管试验模型为二维,但测量的分布不是二维而是三维。随着模型攻角从φ =-1.5°减小到-4.0°,大的压力脉动区向后缘移动。
A low-speed unsteady Pressure-Sensitive Paint (PSP) measurement was applied to an unsteady pressure field on a 2-dimensional NACA0012 model, which accompanied by a trailing edge noise around 940 Hz. Maximum pressure fluctuation at U=28.6 m/s was about 150Pa p-p. Anodized-aluminum PSP (AA-PSP), which is one of the fast-response PSPs, was coated on the model. Unsteady pressure on the model was measured using the scanning unsteady PSP measurement system and the quantitative unsteady pressure power was mapped. Large pressure fluctuation was located near the trailing edge. Though the test model was 2-dimensional, the measured distribution was not 2-dimensional but 3dimensional. It was also measured that the large pressure fluctuation area moved toward the trailing edge according to the decrease of the model angle of attack from =-1.5° to -4.0°.
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