Abstract
Explosion of fuel mixtures is a well-known physical phenomenon, with great importance in many fields. We investigate the 3-branches explosion limits of a hydrogen-oxygen system. Unlike most studies to date which often deal with a part of the explosion limits only, we investigate this phenomenon from a unified approach, by two different methods. The first method expands the work of Semenov, developing a universal self-ignition criterion based on the ignition delay time of the mixture, taking into account the different mechanisms governing each distinct limit. We present a unified model for H2-O2 explosion, capable of reproducing known experimental results. In our second method we examine the molecular fluctuations in concentration of the chain-carriers within the system. To do so, we use methods from the field of statistical thermodynamics. We present a Grand Canonical Ensemble model evaluating the microscopic and macroscopic properties of the system and their fluctuations. Additionally, we perform a numerical simulation using a chemical reaction set, to examine the effects of the fluctuations on the ignition properties, so as to see under which conditions transition occurs from slow to fast reaction.
Original language | English |
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State | Published - 1 Jan 2017 |
Externally published | Yes |
Event | 57th Israel Annual Conference on Aerospace Sciences, IACAS 2017 - Tel Aviv and Haifa, Israel Duration: 15 Mar 2017 → 16 Mar 2017 |
Conference
Conference | 57th Israel Annual Conference on Aerospace Sciences, IACAS 2017 |
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Country/Territory | Israel |
City | Tel Aviv and Haifa |
Period | 15/03/17 → 16/03/17 |
ASJC Scopus subject areas
- Aerospace Engineering