التفاصيل البيبلوغرافية
| العنوان: |
Unfocused laser ignition of high-pressure He-H2-O2 combustible mixtures |
| المؤلفون: |
Ferreira, R. Grosso, Carvalho, B., Rodrigues, J., Rodrigues, R., Smith, A., Marraffa, L., da Silva, M. Lino |
| سنة النشر: |
2022 |
| المجموعة: |
Physics (Other) |
| مصطلحات موضوعية: |
Physics - Chemical Physics |
| الوصف: |
We report consistent ignition of high-pressure (p > 20-30 bar) hydrogen-oxygen mixtures diluted with helium, using an unfocused Nd:YAG laser. This corresponds to laser irradiances several orders of magnitude below the minimum ignition energies reported in the literature. By placing a mirror inside a cylindrical vessel and filling it up to 100 bar with H2-He or O2-He non-combustible mixtures, we obtain the pressure-dependent absorptivity of the combustible He-H2-O2 mixture. We find no measurable absorption of the laser signal by the medium, for the overall pressure range, to the experimental apparatus sensitivity (about 1% of the laser irradiance). This leads credence to the theory that ignition stems from seed electrons created by autofocusing ionization of dust/impurities in the gas. |
| نوع الوثيقة: |
Working Paper |
| URL الوصول: |
http://arxiv.org/abs/2203.04278 |
| رقم الانضمام: |
edsarx.2203.04278 |
| قاعدة البيانات: |
arXiv |