Problems Encountered in Fluctuating Flame Temperature Measurements by Thermocouple.
Problems Encountered in Fluctuating Flame Temperature Measurements by Thermocouple.
复制标题
DOI：
10.3390/s8127882
复制
发表时间：
2008-12-04
期刊：
影响因子：
--
通讯作者：
Lucero RE
中科院分区：
文献类型：
--
作者：
Yilmaz N;Gill W;Donaldson AB;Lucero RE
为了获得热电偶读数对火焰波动的灵敏度，并确定平均热电偶阅读是否代表波动火焰的局部体积温度，进行了一些热电偶实验。所考虑的热电偶是具有可比时间常数的暴露结热电偶和全护套热电偶。以300- 4，096 Hz之间的采样率记录每个测试的电压信号或指示温度。然后相对于时间或样品数量绘制迹线，使得电压或温度的时间变化可以可视化，并且可以确定平均指示温度。对于使用高采样率的实验，使用快速傅里叶变换（FFT）分析信号以确定热电偶信号中存在的频率。这提供了一个基本的观察，以探针是否能够遵循火焰振荡。为了增强振荡，在一些实验中，火焰被强迫。基于热电偶时间常数的分析，结合正弦输入的传递函数，对实验结果进行了测试。
Some thermocouple experiments were carried out in order to obtain sensitivity of thermocouple readings to fluctuations in flames and to determine if the average thermocouple reading was representative of the local volume temperature for fluctuating flames. The thermocouples considered were an exposed junction thermocouple and a fully sheathed thermocouple with comparable time constants. Either the voltage signal or indicated temperature for each test was recorded at sampling rates between 300-4,096 Hz. The trace was then plotted with respect to time or sample number so that time variation in voltage or temperature could be visualized and the average indicated temperature could be determined. For experiments where high sampling rates were used, the signal was analyzed using Fast Fourier Transforms (FFT) to determine the frequencies present in the thermocouple signal. This provided a basic observable as to whether or not the probe was able to follow flame oscillations. To enhance oscillations, for some experiments, the flame was forced. An analysis based on thermocouple time constant, coupled with the transfer function for a sinusoidal input was tested against the experimental results.
影响因子：
4.4
作者：
Wang, HY;Bechtold, JK;Law, CK
通讯作者：
Law, CK
影响因子：
4.7
作者：
Gotoda, Hiroshi;Ueda, Toshihisa;Cheng, Robert K.
通讯作者：
Cheng, Robert K.
影响因子：
4.4
作者：
Sato, H;Amagai, K;Arai, M
通讯作者：
Arai, M