Pressure-sensitive paint measurements in a shock tube
Pressure-sensitive paint measurements in a shock tube
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激波管中的压敏涂料测量
DOI：
10.1007/s003480050003
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发表时间：
2000
影响因子：
2.4
通讯作者：
H. Ji
中科院分区：
文献类型：
--
作者：
J. Hubner;Bruce R Carroll;K. Schanze;H. Ji
摘要利用薄膜压敏涂料在小尺寸、低压比激波管的短时、瞬变流动环境中测量了 表面压力。讨论了涂层配方、测量不确定度、光学系统设计、温度和光照补偿等问题。压力测量是在沿平坦侧壁和楔形侧壁经过正常激波和膨胀区后的稳定流动条件下获得的。PSP特征反应时间为3~6 ms。激波管测量的总体压力不确定度在一个大气层上高达5%，与理论估计的不确定度相比很好。
Abstract Surface pressures were measured in the short-duration, transient flow environment of a small-scale, low pressure-ratio shock tube using thin-film pressure-sensitive paint (PSP). Issues regarding coating formulation, measurement uncertainty, optical system design, and temperature and illumination compensation are discussed. The pressure measurements were acquired during steady flow conditions following the passage of normal shocks and expansion regions along a flat sidewall and a wedge sidewall. The PSP characteristic response time was 3 to 6 ms. Overall pressure uncertainty for the shock tube measurements ranged up to 5% over one atmosphere and compared well with theoretical estimates of uncertainty.