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Development of Bakelite-Based Temperature Sensitive Paint for High Speed Wind Tunnel Applications

机译:用于高速风洞应用的胶木基热敏涂料的开发

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Aerodynamic measurement techniques have evolved significantly in recent years, especially in the regimes of supersonic and hypersonic flow. Hypersonic flow has long been studied for its thermophysical challenges, especially as they relate to atmospheric reentry. Numerical and experimental studies have led to many discoveries in the field, but there is still much to be learned. One of the tools being used in wind tunnel tests is temperature-sensitive paint. This tool can be used to obtain global surface temperature measurements which can be useful in determining heat flux and visualizing the location of boundary layer transition. This study examines the use of bakelite, a naturally luminescent phenol-formeldehyde resin, to develop a temperature-sensitive paint suitable for high temperatures. However, it is still desirable to be able to measure off-design performance, and as such a wide range of temperature sensitivity is desirable. Static tests of different bakelite samples were conducted and showed temperature sensitivities up to -2.3 %/K. These values show the usefulness of bakelite as a temperature sensor.
机译:近年来,空气动力学测量技术已经发生了重大变化,特别是在超音速和高音速流动领域。长期以来,高超声速流因其热物理挑战而被研究,尤其是与大气折返有关的挑战。数值和实验研究已导致该领域的许多发现,但仍有很多东西要学习。风洞测试中使用的一种工具是对温度敏感的涂料。该工具可用于获取整体表面温度测量值,这可用于确定热通量并可视化边界层过渡的位置。这项研究研究了使用胶木(一种自然发光的酚醛树脂)来开发适用于高温的热敏涂料。但是,仍然希望能够测量偏离设计的性能,因此,希望具有宽范围的温度敏感性。进行了不同胶木样品的静态测试,结果表明温度敏感度高达-2.3%/ K。这些值显示了胶木作为温度传感器的有用性。

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