Experimental determination of critical conditions for hydrogen-air detonation propagation in partially confined geometry
| Autor: | Andrzej Teodorczyk, K. Dziubanii, W. Rudy, M. Zbikowski |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Range (particle radiation)
Hydrogen Renewable Energy Sustainability and the Environment Chemistry 020209 energy Detonation Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Condensed Matter Physics 01 natural sciences Molecular physics 010305 fluids & plasmas Open-channel flow Acceleration Fuel Technology 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Critical condition Stoichiometry Communication channel |
| Zdroj: | International Journal of Hydrogen Energy. 42:7366-7373 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2016.04.056 |
| Popis: | An experimental investigation was performed to determine critical semi-open channel height (h*) and two-sided open channel width (w*) in which hydrogen-air detonation may propagate. Three types of gaseous mixture composition were used: 25%, 29.6% and 40% of hydrogen in air. Experimental setup was based on rectangular (0.11 × 0.11 × 2 m) test channel equipped with acceleration section (0.11 × 0.11 × 1 m). Different channel heights h in range of 15–40 mm and widths w in range of 30–50 mm were used in the test channel. The critical height h* and width w* were defined for each investigated configuration. To determine representative detonation cell sizes λ and to calculate their relationship to h* and w*, the sooted plate technique was used. The results showed that detonation in stoichiometric H2-air mixture may propagate in semi-open channel only when the channel height is very close to or higher than approximately 3λ. For less reactive mixtures critical relation h*/λ reaches 3.1 or 3.6 for mixtures with 25% and 40% of hydrogen in air, respectively. For two-sided open channel similar relations w*/λ were close to 4.9 and 5.5 for 29.6%H2 and 40%H2 in air, respectively. |
| Databáze: | OpenAIRE |
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