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首页> 外文期刊>International Journal of Rotating Machinery >An Experimental Investigation of Transpiration Cooling. Part I: Application of an Infrared Measurement Technique
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An Experimental Investigation of Transpiration Cooling. Part I: Application of an Infrared Measurement Technique

机译：蒸腾冷却的实验研究。第一部分：红外测量技术的应用

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摘要

This study was an investigation into the application of the infrared thermal imaging technique (IRTIT) to evaluate transpiration cooling performance through a porous wall. Two typical infrared thermograph systems, the AGA 782 short-wavelength system and the VARIOSCAN 3021 long-wavelength system, were employed to demonstrate the availability of the IRTIT measurement. In comparison with general infrared apparent temperature measurement, several factors that influence measurement accuracy need to be addressed in the application of the IRTIT in the region of transpiration cooling on the porous surfaces of turbine components. In this article, the influence of these factors on measurement accuracy is discussed, the corresponding calibration methods of the two infrared systems are described, and the ambient conditions and stability of the measurement are analyzed. Aporous circular tube was used as a specimen. The tube consisted of sintered chromium-nickel steel with a porosity of 21%. The experiment was carried out in the hot-gas wind tunnel at the Institute of Thermal Turbomachinery at the University of Stuttgart, Stuttgart, Germany.
机译：这项研究是对红外热成像技术（IRTIT）在通过多孔壁的蒸腾冷却性能评估中的应用的调查。两种典型的红外热像仪系统，即AGA 782短波长系统和VARIOSCAN 3021长波长系统，被用来证明IRTIT测量的可用性。与一般的红外表观温度测量相比，在涡轮机部件的多孔表面上的蒸发冷却区域中应用IRTIT时，需要解决几个影响测量精度的因素。本文讨论了这些因素对测量精度的影响，介绍了两种红外系统的相应校准方法，并分析了环境条件和测量的稳定性。使用多孔圆管作为样品。该管由孔隙率为21％的烧结铬镍钢组成。该实验是在德国斯图加特大学斯图加特大学热力涡轮机械研究所的热气风洞中进行的。

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