Ultrafast-Response Anodized-Aluminum Pressure-Sensitive Paints for Unsteady Flow Measurement
Ultrafast-Response Anodized-Aluminum Pressure-Sensitive Paints for Unsteady Flow Measurement
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DOI：
10.2514/1.j054886
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发表时间：
2017-04-01
期刊：
影响因子：
2.5
通讯作者：
Asai, Keisuke
中科院分区：
文献类型：
--
作者：
Numata, Daiju;Fujii, Shota;Asai, Keisuke
为了将压敏漆（PSP）应用于激波管实验中激波-障碍物相互作用等非定常激波现象，制备了具有超快响应的阳极氧化铝PSP（AA-PSP），并利用激波管测试了其对阶跃压力变化的响应时间。在阳极氧化过程中使用磷酸作为电解液，成功制备了孔径达160 nm的阳极氧化铝。这种改进的AA-PSP实现了时间常数为0.35 μ s的响应。该AA-PSP被应用于运动激波与圆柱的相互作用。结果表明，改进后的AA-PSP能以最高的空间和时间分辨率显示激波反射和激波绕射。
To apply pressure-sensitive paint (PSP) to unsteady shock-wave phenomena such as shock-obstacle interactions in shock-tube experiments, 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 the anodization process, and the anodic alumina with pore diameter as large as 160 nm was successfully fabricated. This improved AA-PSP achieved a response with the time constant of 0.35 mu s. This AA-PSP was applied 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.