Laminar premixed flame characteristics of hydrogen blended iso-octane–air–nitrogen mixtures
✍ Scribed by Toni Tahtouh; Fabien Halter; Christine Mounaïm-Rousselle
- Book ID
- 103832767
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 487 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0360-3199
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✦ Synopsis
The combined effects of hydrogen addition and nitrogen dilution on laminar flame characteristics for iso-octaneeair stoichiometric mixtures were investigated. The spherical expanding flames technique, in a constant volume bomb, was employed. The mole fraction of hydrogen in the iso-octaneehydrogen mixture was varied from 0 to 1 and the mole fraction of nitrogen in the total mixture (iso-octaneehydrogeneair-diluent) from 0 to 0.4. Measurements were performed at an initial pressure of 0.1 MPa and an initial temperature of 300 K. The laminar burning velocity strongly decreases with nitrogen dilution and for all dilution rates increases linearly with hydrogen mass percentage. The burned gas Markstein length is reduced with the increase in hydrogen amount in the mixture until it reaches negative values, the opposite effect of nitrogen dilution. From these new experimental data, an experimental correlation to estimate the laminar burning velocity of iso-octaneehydrogeneairenitrogen mixtures is proposed. The experimental values of laminar burning velocities are found to be in very good agreement with those predicted by the high temperature mechanism developed by Jerzembeck et al. .