The dual thin-film probe for high-frequency flow temperature measurements
The dual thin-film probe for high-frequency flow temperature measurements
复制标题
用于高频流量温度测量的双薄膜探头
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
T. Arts
中科院分区：
文献类型：
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作者：
V. Iliopoulou;T. Arts
摘要在管道中，流体总温的测定要求探头不仅要坚固耐用，能承受高温，而且要能正确测定其波动。为了获得准确的测量，三个双薄膜探头的瞬态热流测量技术的基础上已建成的时间平均和时间分辨的数量。首先讨论了探针的设计。探头，放置在冯卡门研究所（VKI）压缩管设施CT-2的级联后面，通过与热电偶的比较进行验证。VKI压缩管设施CT-3中1.5级高速涡轮机的转子和第二个定子后面也成功进行了测量。用冷丝探针进行比较。在转子和第二定子后面测得的最大-最小温度波动分别为24 °和7°。
Abstract In turbomachines, the flow total temperature determination requires probes that are not only robust and withstand high temperatures, but also able to correctly determine their fluctuations. To obtain accurate measurements, three dual thin-film probes based on a transient heat flux measurement technique have been constructed for time-averaged and time-resolved quantities. The design of the probes is first discussed. The probes, placed behind a cascade in the von Karman Institute (VKI) compression tube facility CT-2, are validated through a comparison with thermocouples. Measurements are also successfully performed behind the rotor and the second stator of the 1.5 stage high-speed turbine in the VKI compression tube facility CT-3. The comparison is made with a cold wire probe. The maximum-minimum temperature fluctuations measured behind the rotor and the second stator are 24 and 7°, respectively.