The effects of hydrogen addition on the auto-ignition delay of homogeneous primary reference fuel/air mixtures in a rapid compression machine
| Autor: | Jinhwa Chung, Soonho Song, Hyunsoo An, Seunghyeon Lee |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Range (particle radiation) Hydrogen Renewable Energy Sustainability and the Environment Chemistry Homogeneous charge compression ignition Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element CHEMKIN Condensed Matter Physics law.invention Chemical kinetics Ignition system Minimum ignition energy Fuel Technology Hydrocarbon law |
| Zdroj: | International Journal of Hydrogen Energy. 40:13994-14005 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2015.08.022 |
| Popis: | The ignition delay time with mixtures of primary reference fuels (PRFs) and hydrogen were measured using a rapid compression machine (RCM), where the concentration of hydrogen was systematically varied. The experiments were performed for compressed temperatures in the range 735–847 K. The fuel/air equivalence ratio was varied to investigate its effects on the ignition delay of n-heptane and iso-octane. Hydrogen was added with hydrogen-energy-share ratios in the range of 0–10%, meaning that the energy of the hydrogen replaced 0–10% of that of either n-heptane or iso-octane. When hydrogen was added to n-heptane, there was a significant increase in the ignition delay, especially during the first-stage reaction region. This was explained using the chemical kinetic analysis software package CHEMKIN PRO; hydrogen consumed radical species related to the ignition of hydrocarbon fuels. With iso-octane, there was a significant increase in the ignition delay not only in the fist-stage reaction region, but also in second-stage reaction region. The effects of the hydrogen concentration were found to depend on the equivalence ratio and temperature for both fuels. |
| Databáze: | OpenAIRE |
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