| Autor: |
Mitsutomo HIROTA, Kota HASHIMOTO, Hiroki OSO, Goro MASUYA |
| Jazyk: |
angličtina |
| Rok vydání: |
2009 |
| Předmět: |
|
| Zdroj: |
Journal of Thermal Science and Technology, Vol 4, Iss 1, Pp 169-177 (2009) |
| Druh dokumentu: |
article |
| ISSN: |
1880-5566 |
| DOI: |
10.1299/jtst.4.169 |
| Popis: |
A high-frequency (20kHz) standing wave was applied to the unburned mixture upstream of a methane-air lifted jet flame using a bolt-clamped Langevin transducer (BLT) to improve stability. The flow field near the flame was visualized using acetone planar-laser-induced fluorescence (PLIF). The standing wave decreased the lifted flame height and increased the blow-off limit. The upstream flow field of the center jet then bent. This phenomenon appeared when there was a density difference between the center jet and the surrounding secondary flow. When the density of the center jet was less than that of the co-flow, the center jet was redirected to the pressure anti-node side. Conversely, when the density of the center jet was greater than that of the co-flow, the center jet was redirected to the pressure node side. This redirection tended to stabilize the laminar lifted flame. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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