| 학회 | 한국화학공학회 |
| 학술대회 | 2010년 가을 (10/21 ~ 10/22, 대전컨벤션센터) |
| 권호 | 16권 2호, p.1907 |
| 발표분야 | 유동층 |
| 제목 | Type Transition in Onset Condition of Turbulent Fluidization |
| 초록 | The next to the bubbling or slugging regime is called turbulent regime in gas fluidized beds as gas velocity increases. The turbulent regime is often realized to represent a dramatic breakdown of bubbling or slugging, and the predominance of bubble breakup over bubble coalescence. Chehbouni et al. (1995) reported that the onset velocity of turbulent fluidization Uc decreased with an increase of temperature in the bed of FCC particles (Geldart's group A; 78 μm, 1450 kg/m3). However, the Uc increased with temperature for Geldart’s group B particles. According to the study of Peeler et al. (1999) as temperature increased, the Uc decreased after an initial increase in the bed of sand particles (Geldart’s type B; 130 μm, 4400 kg/m3) using N2 as fluidizing gas and decreased in the bed of alumina particles (Geldart’s type A; 70 μm, 2800 kg/m3) using N2 or He as fluidizing gas. Choi et al. (2010) explained those complicated trends successfully with their model. This study is to discuss the model of Choi et al. (2010) more. The type transition in onset condition of turbulent fluidization was found to occur at Archimedes number (Ar) 21. |
| 저자 | 최정후1, 류호정2, 이창근2 |
| 소속 | 1건국대, 2한국에너지기술(연) |
| 키워드 | Gas Fluidized Bed; Turbulent Fluidization; Temperature Effect; Onset Velocity; Uc |
| 원문파일 | 초록 보기 |
