Time-resolved entropy measurements using a fast response entropy probe

Time-resolved entropy measurements using a fast response entropy probe
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使用快速响应熵探针进行时间分辨熵测量

DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
R. Abhari
R. Abhari
中科院分区：
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文献类型：
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作者：
M. Mansour;N. Chokani;A. Kalfas;R. Abhari

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本文介绍了最近研制的微型快速响应熵探头及其在苏黎世联邦理工学院涡轮机械设备中的应用。该探头的发展是由需要更清楚地记录涡轮机恶劣环境中的损耗产生机制的动机。该探头由一个压阻式传感器和一对薄膜计组成，分别测量非定常压力和温度。因此可以确定非定常相对熵。首先详细介绍了探头的设计、制造和标定。然后描述了它在离心压气机、轴向涡轮和气膜冷却流中的应用，详细描述了非定常熵场和相关损失。
This paper describes a recently developed miniature fast response entropy probe and its application in the turbomachinery facilities at ETH Zurich. The development of the probe is motivated by the need to more clearly document the loss generation mechanisms in the harsh environment of turbomachines. The probe is comprised of a piezoresistive sensor and a pair of thin-film gauges that measure the unsteady pressure and temperature, respectively. The unsteady relative entropy can thus be determined. The design, manufacture and calibration of the probe are first presented in detail. Its application to detail the unsteady entropy field, and associated losses, in a centrifugal compressor, axial turbine and film cooling flows are then described.