scholarly journals Effects of the Tube Shape and Particle Properties on Flow Characteristics of a Gas-Solid Spouted Bed with a Draft Tube

2014 ◽  
Vol 28 (3) ◽  
pp. 366-376
Author(s):  
Hiroshi NAGASHIMA ◽  
Kazumi SUZUKAWA ◽  
Toshifumi ISHIKURA
Keyword(s):  
Draft Tube ◽  
Flow Characteristics ◽  
Spouted Bed ◽  
Particle Properties ◽  
Tube Shape

Critical Assessment of Performance of a Draft Tube Configured in a Spouted Bed for Various Fluid–Particle Properties

2019 ◽  
Vol 58 (42) ◽  
pp. 19670-19680 ◽  
Author(s):  
Palash Kumar Mollick ◽  
Aniruddha Bhalchandra Pandit ◽  
Pallippattu Krishnan Vijayan ◽  
Madangopal Krishnan
Keyword(s):  
Draft Tube ◽  
Critical Assessment ◽  
Fluid Particle ◽  
Spouted Bed ◽  
Particle Properties ◽  
Assessment Of Performance

scholarly journals Flow Characteristics of Draft Tube Spouted Bed and Its Application.

1997 ◽  
Vol 34 (5) ◽  
pp. 343-360 ◽  
Author(s):  
Yasuo HATATE ◽  
Kazuya IJICHI ◽  
Yoshimitsu UEMURA
Keyword(s):  
Draft Tube ◽  
Flow Characteristics ◽  
Spouted Bed

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 Minimum spoutable gas flow rate in side-outlet spouted bed with inner draft-tube.

1981 ◽  
Vol 14 (6) ◽  
pp. 462-466 ◽  
Author(s):  
HIROTSUGU HATTORI ◽  
KAZUYUKI TANAKA ◽  
KUNIHIKO TAKEDA
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Draft Tube ◽  
Gas Flow Rate ◽  
Spouted Bed ◽  
Side Outlet

Cycle time in draft tube conical spouted bed dryer for sludge from paper industry

2013 ◽  
Vol 100 ◽  
pp. 413-420 ◽  
Author(s):  
María J. San José ◽  
Sonia Alvarez ◽  
Francisco J. Peñas ◽  
Iris García
Keyword(s):  
Cycle Time ◽  
Draft Tube ◽  
Paper Industry ◽  
Spouted Bed

Drying of Agricultural Grains in a Multiple Porous Draft Tube Spouted Bed

2017 ◽  
Vol 204 (8) ◽  
pp. 942-950 ◽  
Author(s):  
S. Rajashekhara ◽  
D. V. R. Murthy
Keyword(s):  
Draft Tube ◽  
Spouted Bed

Modelling batch drying of sand in a draft-tube conical spouted bed

2011 ◽  
Vol 89 (10) ◽  
pp. 2054-2062 ◽  
Author(s):  
Martin Olazar ◽  
Gartzen Lopez ◽  
Haritz Altzibar ◽  
Javier Bilbao
Keyword(s):  
Draft Tube ◽  
Spouted Bed
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