Role of hydroxyl production and heat release in the two-zone fuel-rich adiabatic dimethyl ether/air flames at atmospheric pressure
| Autor: | Vladimir M. Shvartsberg, Tatyana A. Bolshova, V. S. Babkin, V.A. Bunev |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Laminar flame speed
General Chemical Engineering General Physics and Astronomy Energy Engineering and Power Technology 01 natural sciences chemistry.chemical_compound fluids and secretions 0103 physical sciences Organic chemistry Dimethyl ether Adiabatic process reproductive and urinary physiology Premixed flame 010304 chemical physics Atmospheric pressure Chemistry Diffusion flame Laminar flow General Chemistry Flame speed humanities 010406 physical chemistry 0104 chemical sciences Fuel Technology Chemical engineering Modeling and Simulation |
| Zdroj: | Combustion Theory and Modelling. 21:1176-1188 |
| ISSN: | 1741-3559 1364-7830 |
| DOI: | 10.1080/13647830.2017.1366552 |
| Popis: | Fuel-rich laminar adiabatic flames of premixed dimethyl ether/air mixtures at a high initial temperature and atmospheric pressure have been studied by numerical simulation and sensitivity analysis. These flames, having two heat release zones, are of great interest as an unusual and little-studied subject. We have investigated the chemical processes occurring in the two zones and analysed the mechanism of heat release in the flame. It has been found that the key reactions that have a significant influence on the flame speed are those involving dimethyl ether and the products of its incomplete oxidation. Calculation of the heat release rate confirms the presence of two heat release zones in the flame. A comparison of the reactions making a major contribution to the heat release with those significantly affecting the flame speed indicates that the main factor determining the flame speed is the formation of hydroxyls, rather than heat release. Analysis of the flame speed sensitivity shows that in the case of ... |
| Databáze: | OpenAIRE |
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