The Effects of Initial Diameter on Sooting and Burning Behavior of Isolated Droplets under Microgravity Conditions
| Autor: | Kyeong-Ook Lee, Samuel L. Manzello, Mun Young Choi |
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| Rok vydání: | 1998 |
| Předmět: |
Heptane
Meteorology Chemistry General Chemical Engineering Analytical chemistry General Physics and Astronomy Energy Engineering and Power Technology General Chemistry Combustion Residence time (fluid dynamics) medicine.disease_cause Soot Light extinction chemistry.chemical_compound Fuel Technology Volume fraction medicine Particle size Fuel vapor |
| Zdroj: | Combustion Science and Technology. 132:139-156 |
| ISSN: | 1563-521X 0010-2202 |
| DOI: | 10.1080/00102209808952013 |
| Popis: | The influence of initial droplet diameter on the sooting and burning behavior of isolated droplets under microgravity conditions was investigated by measuring soot volume fraction, ƒv, soot mass, m s, soot and burning rate. Theƒ v, and m s, soot were measured using a full-field light extinction and tomographic inversion technique. The experiments were conducted at the NASA-Lewis 2·2 second droptower in Cleveland, OH. The ƒ v, and m s, soot measurements represent the first quantitative assessment of the influence of initial diameter on the sooting behavior in microgravity conditions. Results indicate that ƒ v(which provides information regarding the local magnitude of sooting) and m s, soot (which is related to overall sooting magnitude) are sensitive to the initial droplet size. It is believed that the spatial extent of the flame which is proportional to the droplet size, influences the residence time for fuel vapor transport. Thus, larger droplets will provide longer residence time for fuel pyro... |
| Databáze: | OpenAIRE |
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