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Measurements on the Propagation Characteristics of the Hydrogen Flame by Ultra Fine Thermocouple  

Kim, Dong-Joon (Research Institute of science for Safety and Sustainability, Natinal institute of Industrial Science and Technology)
Publication Information
Journal of the Korean Institute of Gas / v.14, no.3, 2010 , pp. 8-13 More about this Journal
Abstract
Hydrogen is expected to become a new, clean source of energy for the next generation. Therefore, many studies have investigated the characteristics of the hydrogen flame. However, because the hydrogen flame has high temperature, the flame does not emit visible light, and the flame propagates at a high velocity, investigating its characteristics is difficult. In the present study, in order to simultaneously examine the flame temperature and flame propagation velocity of hydrogen/air mixtures, ultra fine thermocouples with diameters of 12.7, 25.4, and 50.8 ${\mu}m$ are utilized. The results show that it is possible to detect the arrival time of the flame. Due to the temperature compensation with the time constants of thermocouples, it is also possible to estimate the flame temperature.
Keywords
hydrogen; flame; ultra fine thermocouple; propagation velocity; temperature;
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