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Effect of draft tube position on the hydrodynamics of a draft tube slurry bubble column
The Chemical Engineering Journal and the Biochemical Engineering Journal, 1995Abstract Two- and three-phase hydrodynamic studies were conducted in an air lift bubble column with an internal loop. The bubble column had a conical distributor at the bottom, through which the gas was sparged, creating a liquid or slurry circulation from the draft tube to be annular region.
F.F. Pironti +3 more
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Effect of draft tube geometry on pressure drop in draft tube conical spouted beds
The Canadian Journal of Chemical Engineering, 2013AbstractA hydrodynamic study of conical spouted beds equipped with draft tubes of different configurations have been carried out for fine and coarse particles belonging to Geldart groups D and B, respectively. The draft tubes used are conventional non‐porous tubes and open‐sided tubes, and runs have been carried out following a design of experiments in
Haritz Altzibar +3 more
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Spouting with a porous draft‐tube
The Canadian Journal of Chemical Engineering, 1983AbstractParticle motion and gas distribution have been measured in 0.3 m spouted beds with porous and solid wall draft‐tubes. Particle velocity in the annulus varied with gas rate and bed geometry. Narrow particle residence time distributions were observed under all conditions.
J. K. Claflin, A. G. Fane
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Drying of Suspensions in the Draft Tube Spouted Bed
The Canadian Journal of Chemical Engineering, 2004AbstractA draft tube spouted bed dryer with inert particles was used for drying suspensions. The effects of the operating conditions on dryer throughput and product quality were investigated. Experiments were performed in a cylindrical column 215 mm in diameter with a draft tube 70 mm in diameter and 900 mm in length.
Arsenijević, Zorana Lj. +2 more
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The Noise Analysis for Draft Tube of Turbine
Noise & Vibration Worldwide, 2011We take the field test data from the entrance to the draft tube of the turbine of a hydropower station as an example, the signals acquired are depicted in time domain and frequency spectrum, and the relation between the noise and the load is analyzed, then we find out the reasons which cause noise and put forward the measures for noise elimination ...
Dehua Wei, Weiguo Zhao
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A method of flow measurement in draft tube
2014 ISFMFE - 6th International Symposium on Fluid Machinery and Fluid Engineering, 2014The measurement of flow rate is the most difficult and challenging part of the hydropower station tests. This paper provided a method based on differential pressure which has high precision, less cost and convenience. Three-dimensional numerical simulation was performed for NTNU (Norwegian University of Science and Technology) model turbine in steady ...
null Honghao Chen +3 more
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Economic Draft-Tube Proportions
Journal of Fluids Engineering, 1941Abstract The purpose of this paper is to illustrate a new method whereby the most efficient and also the most economical proportions of a draft tube for a water-turbine installation may be found. A study is made of the excavation and concrete costs, as the ratios of draft-tube width to runner diameter and draft-tube depth to runner ...
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Comparative Tests on Experimental Draft-Tubes
Transactions of the American Society of Civil Engineers, 1924This paper gives the results of tests, made at the Alden Hydraulic Laboratory, on twelve model draft-tubes, to determine the relative efficiencies of drafttubes of different types under the hydraul...
C. M. Allen, I. A. Winter
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Structure Design Draft Tube of Xiaoshankou Hydropower Station
Applied Mechanics and Materials, 2012This The draft tube is one of the main load-bearing structure of the hydropower plant, The hydropower draft tube of Xiaoshankou is an underground space structure, mainly composed by the taper pipe segment, elbows segment and diffusion segment. This paper describe the structure design and calculation process of Xiaoshankou hydropower draft tube ...
null Kang Yingbin +2 more
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