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Investigation on the Self-ignition of High-pressure Hydrogen in a Tube between Different Inner Diameter  

Kim, Sei Hwan (Daewoo Shipbuilding & Marine Engineering Co., Ltd.)
Jeung, In-Seuck (Department of aerospace engineering, Seoul National University)
Lee, Hyoung Jin (Department of aerospace engineering, Inha University)
Publication Information
Journal of the Korean Society of Combustion / v.23, no.1, 2018 , pp. 36-43 More about this Journal
Numerical simulations and experiments are performed to investigate the flame development inside tubes with different diameters at the same burst pressure. It is shown that generation of a stable flame play a role in self-ignition. In the smaller tube, multi-dimensional shock interaction is occurred near the diaphragm. After flame of a cross-section is developed, stable flame remains for a moment then it grows having enough energy to overcome the sudden release at the exit. Whereas shock interaction generate complex flow further downstream for a larger tube, it results in stretched flame. This dispersed flame has lower average temperature which makes it easily extinguished.
High pressure hydrogen gas; Extension tube diameter; Spontaneous ignition;
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