A new approach to the analysis of the explosion limits of hydrogen-oxygen system

A. Lidor, D. Weihs, E. Sher

Research output: Contribution to conferencePaperpeer-review

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 languageEnglish
StatePublished - 1 Jan 2017
Externally publishedYes
Event57th Israel Annual Conference on Aerospace Sciences, IACAS 2017 - Tel Aviv and Haifa, Israel
Duration: 15 Mar 201716 Mar 2017

Conference

Conference57th Israel Annual Conference on Aerospace Sciences, IACAS 2017
Country/TerritoryIsrael
CityTel Aviv and Haifa
Period15/03/1716/03/17

ASJC Scopus subject areas

  • Aerospace Engineering

Fingerprint

Dive into the research topics of 'A new approach to the analysis of the explosion limits of hydrogen-oxygen system'. Together they form a unique fingerprint.

Cite this