scholarly journals Flow characteristics of bubble column with perforated draft tube. Effects of equipment dimensions and gas dispersion.

1992 ◽  
Vol 25 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Yoshiyuki Bando ◽  
Makoto Nishimura ◽  
Hiroyuki Sota ◽  
Koji Toyoda ◽  
Shinobu Suzuki ◽  
...  
Keyword(s):  
Draft Tube ◽  
Bubble Column ◽  
Flow Characteristics ◽  
Gas Dispersion

scholarly journals Flow Characteristics of Bubble Column with Packed Perforated Draft Tube.

1993 ◽  
Vol 19 (3) ◽  
pp. 489-495 ◽  
Author(s):  
Yoshiyuki Bando ◽  
Makoto Nishimura ◽  
Yoshinori Watanabe ◽  
Atsushi Sato ◽  
Morio Miwa ◽  
...  
Keyword(s):  
Draft Tube ◽  
Bubble Column ◽  
Flow Characteristics

Flow characteristics of countercurrent bubble column with perforated draft tube

1992 ◽  
Vol 47 (13-14) ◽  
pp. 3371-3378 ◽  
Author(s):  
Y. Bando ◽  
M. Nishimura ◽  
H. Sota ◽  
S. Suzuki ◽  
N. Kawase
Keyword(s):  
Draft Tube ◽  
Bubble Column ◽  
Flow Characteristics

scholarly journals Flow characteristics of bubble column with perforated draft tube in viscous liquid.

1995 ◽  
Vol 28 (2) ◽  
pp. 225-227 ◽  
Author(s):  
Yoshiyuki Bando ◽  
Makoto Nishimura ◽  
Akira Hayashi ◽  
Shinji Hiura ◽  
Shigeyuki Ido ◽  
...  
Keyword(s):  
Viscous Liquid ◽  
Draft Tube ◽  
Bubble Column ◽  
Flow Characteristics

scholarly journals Flow characteristics in a bubble column with perforated draft tube.

1988 ◽  
Vol 14 (5) ◽  
pp. 663-669 ◽  
Author(s):  
Yoshiyuki Bando ◽  
Michio Kuraishi ◽  
Makoto Nishimura ◽  
Makoto Hattori ◽  
Koji Toyoda ◽  
...  
Keyword(s):  
Draft Tube ◽  
Bubble Column ◽  
Flow Characteristics

scholarly journals Effect of Air Injection on the Internal Flow Characteristics in the Draft Tube of a Francis Turbine Model

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1182
Author(s):  
Seung-Jun Kim ◽  
Yong Cho ◽  
Jin-Hyuk Kim
Keyword(s):  
Flow Rate ◽  
Draft Tube ◽  
Pressure Fluctuations ◽  
Flow Characteristics ◽  
Internal Flow ◽  
Air Injection ◽  
Low Flow ◽  
Francis Turbine ◽  
Navier Stokes ◽  
Vortex Rope

Under low flow-rate conditions, a Francis turbine exhibits precession of a vortex rope with pressure fluctuations in the draft tube. These undesirable flow phenomena can lead to deterioration of the turbine performance as manifested by torque and power output fluctuations. In order to suppress the rope with precession and a swirl component in the tube, the use of anti-swirl fins was investigated in a previous study. However, vortex rope generation still occurred near the cone of the tube. In this study, unsteady-state Reynolds-averaged Navier–Stokes analyses were conducted with a scale-adaptive simulation shear stress transport turbulence model. This model was used to observe the effects of the injection in the draft tube on the unsteady internal flow and pressure phenomena considering both active and passive suppression methods. The air injection affected the generation and suppression of the vortex rope and swirl component depending on the flow rate of the air. In addition, an injection level of 0.5%Q led to a reduction in the maximum unsteady pressure characteristics.

scholarly journals Flow characteristics in a bubble column with enlarged section at bottom.

1987 ◽  
Vol 13 (2) ◽  
pp. 245-249 ◽  
Author(s):  
Yoshiyuki Bando ◽  
Michio Kuraishi ◽  
Makoto Nishimura ◽  
Masayuki Ohshima ◽  
Hidemi Fukuoka
Keyword(s):  
Bubble Column ◽  
Flow Characteristics

The Latest Frontiers of Bubble Columns and Slurry Bubble Columns. Effect of Oil Dispersion on Flow Characteristics in Bubble Column.

2001 ◽  
Vol 27 (4) ◽  
pp. 477-479
Author(s):  
Yoshiyuki Bando ◽  
Makoto Chaya ◽  
Keiji Yasuda ◽  
Yukio Sakurai ◽  
Masaaki Nakamura ◽  
...  
Keyword(s):  
Bubble Column ◽  
Flow Characteristics ◽  
Bubble Columns ◽  
Slurry Bubble Columns
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