Non-steady characteristics of dispersion and ignitability for high-pressurized hydrogen jet discharged from a pinhole
| Autor: | K. Tagashira, Makoto Asahara, Kazuki Okabayashi, Keiji Takeno, M. Komori, K. Kawazoe, A.K. Hayashi |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Hydrogen Nozzle Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Physics::Fluid Dynamics Physics::Plasma Physics law Flame ionization detector Physics::Chemical Physics Jet (fluid) Renewable Energy Sustainability and the Environment 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Ignition system Fuel Technology Particle image velocimetry chemistry Electric spark 0210 nano-technology Water vapor |
| Zdroj: | International Journal of Hydrogen Energy. 44:9071-9079 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2018.05.047 |
| Popis: | Hydrogen gas concentrations and jet velocities were measured downstream by a high response speed flame ionization detector and PIV (Particle Image Velocimetry) in order to investigate the characteristics of dispersion and ignitability for 40–82 MPa high-pressurized hydrogen jet discharged from a nozzle with 0.2 mm diameter. The light emitted from both OH radical and water vapor species yielded from hydrogen combustion, ignited by an electric spark, were recorded by two high speed cameras. From the results, the empirical formula concerning the relationships for time-averaged concentrations, concentration fluctuations and ignition probability were obtained to suggest that they would be independent of hydrogen discharge pressure. |
| Databáze: | OpenAIRE |
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