Time-resolved heat transfer measurement's on the tip wall of a ribbed channel using a novel heat flux sensor - Part I: Sensor and benchmarks
Time-resolved heat transfer measurement's on the tip wall of a ribbed channel using a novel heat flux sensor - Part I: Sensor and benchmarks
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DOI：
10.1115/1.2751141
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发表时间：
2008-01-01
影响因子：
1.7
通讯作者：
von Wolfersdorf, Jens
中科院分区：
文献类型：
--
作者：
Roediger, Tim;Knauss, Helmut;von Wolfersdorf, Jens
测试了一种新型热流传感器，该传感器可以测量与燃气轮机叶片通道研究相关的内部肋形通道中的时间分辨热流密度。原子层热电堆(ALTP)传感器的工作原理是基于YBCO晶体上方的温度梯度(横向Seebeck效应)产生的热电场。该传感器具有非常快的频率响应，可测量高达1 MHz范围的高时间分辨率热流。本文阐述了传感器的设计和工作原理，以及传感器在几种流量条件下的基准测试。对于内部冷却通道，这种新型传感器允许对换热系数进行高精度、时间分辨率的测量，从而更好地了解温度场波动的影响。
A novel heat flux sensor was tested that allows for time-resolved heat flux measurements in internal ribbed channels related to the study of passages in gas turbine blades. The working principle of the atomic layer thermopile (ALTP) sensor is based on a thermoelectric field created by a temperature gradient over an yttrium-barium-copper-oxide (YBCO) crystal (the transverse Seebeck effect). The sensors very fast frequency response allows for highly time-resolved heat flux measurements up to the 1 MHz range. This paper explains the design and working principle of the sensor as well as the benchmarking of the sensor for several flow conditions. For internal cooling passages, this novel sensor allows for highly accurate, time-resolved measurements of heat transfer coefficients, leading to a greater understanding of the influence of fluctuations in temperature fields.