Development of Ultrafast-Response Anodized-Aluminum Pressure-Sensitive Paints
Development of Ultrafast-Response Anodized-Aluminum Pressure-Sensitive Paints
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DOI：
10.2514/6.2013-485
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发表时间：
2013-01
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影响因子：
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通讯作者：
Shota Fujii;D. Numata;H. Nagai;K. Asai
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文献类型：
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作者：
Shota Fujii;D. Numata;H. Nagai;K. Asai
为了将压敏涂料(PSP)应用于非定常冲击波现象，制备了具有超快响应的铝阳极氧化PSP(AA-PSP)，并用激波管法测定了其对阶跃压力变化的响应时间。以磷酸为电解液，成功地制备了孔径为160 nm的氧化铝。改进后的AA-PSP的响应时间常数为0.35，是目前报道的最快的PSP。我们将这种AA-PSP应用于运动激波与圆柱体的相互作用。结果表明，改进的AA-PSP能以最高的时空分辨率显示激波反射和激波绕射。命名法Ai=斯特恩-沃尔默系数d=孔径，nm def=有效扩散系数，m 2 S
In order to apply Pressure-Sensitive Paint (PSP) to unsteady shock-wave phenomena, Anodized-Aluminum PSP (AA-PSP) with ultrafast response was fabricated and its response time to a step pressure change was evaluated by using a shock tube. Phosphoric acid was used as electrolyte in anodization and the anodic alumina with pore diameter as large as 160 nm was successfully fabricated. The improved AA-PSP achieved a response with the time constant of 0.35 s. This is the fastest PSP ever reported. We applied this AA-PSP to interactions of a moving shock wave with a circular cylinder. The results show that the improved AA-PSP can visualize the shock reflections and the shock diffractions with the ever-highest spatial and temporal resolution. Nomenclature Ai = Stern-Volmer coefficients d = pore diameter, nm Deff = effective diffusion coefficient, m 2 s -1