scholarly journals Experimental Study of Blade Angle Effect on Two-Stage Vertical Shaft Hydrofoil Water Turbines on Power and Efficiency

2020 ◽  
Vol 874 ◽  
pp. 012031
Author(s):  
A N E B Santoso ◽  
A Fahruddin ◽  
Iswanto
Keyword(s):  
Experimental Study ◽  
Vertical Shaft ◽  
Blade Angle ◽  
Two Stage ◽  
Angle Effect ◽  
Water Turbines

The Clogging Behavior of a Vortex Pump: An Experimental Study on the Influence of Impeller Designs

2017 ◽  
Author(s):  
Angela Gerlach ◽  
Dorian Perlitz ◽  
Flemming Lykholt-Ustrup ◽  
Christian Brix Jacobsen ◽  
Paul Uwe Thamsen
Keyword(s):  
Experimental Study ◽  
Power Consumption ◽  
Clear Water ◽  
Blade Angle ◽  
Flow Rates ◽  
Blade Number ◽  
Outlet Angle ◽  
Vortex Pump ◽  
Efficiency Losses ◽  
Angle Blade

This paper analyzes the clogging behavior of a vortex pump with different impeller designs. The influence of blade outlet angle, blade number, and impeller diameter were tested. Non-woven textiles in different concentrations served as the clogging material. The results suggest that a smaller outlet blade angle, a higher blade number, and a larger impeller diameter allow pumping more textiles. Impellers that were capable of pumping more textiles, however, were less efficient. Overall, pumping textiles causes efficiency losses. However, this could not be only related to increased power consumption. Flow rates under clogging operation were close to the flow rates under clear water operation irrespective of the amount of clogging material and the impellers design. Further, in all tests clogging material accumulated at the suction mouth in the casing.

scholarly journals Experimental study on a dredged fill ground improved by a two-stage vacuum preloading method

2018 ◽  
Vol 58 (3) ◽  
pp. 766-775 ◽  
Author(s):  
Jun Wang ◽  
Yuanqiang Cai ◽  
Hongtao Fu ◽  
Xiuqing Hu ◽  
Ying Cai ◽  
...  
Keyword(s):  
Experimental Study ◽  
Two Stage ◽  
Vacuum Preloading ◽  
Preloading Method

scholarly journals Experimental Study on Coal Gasification in a Full-Scale Two-Stage Entrained-Flow Gasifier

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4937
Author(s):  
Guangyu Li ◽  
Luping Wang ◽  
Chaowei Wang ◽  
Chang’an Wang ◽  
Ping Wu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Coal Gasification ◽  
Full Scale ◽  
Input Rate ◽  
Two Stage ◽  
Entrained Flow ◽  
Operation Period ◽  
Entrained Flow Gasifier ◽  
Coal Resource ◽  
First Time

In this paper, coal gasification characteristics in the reductor were investigated in a full-scale two-stage pressurized entrained-flow gasifier, which has been seldom conducted previously. The present study aimed at elucidating the effects of gasifying agent concentration, coal input rate, and operation period under full reductor load on the performance of a utility two-stage pressurized entrained-flow gasifier for the first time. When the steam input in the combustor was raised from 3318 kg/h to 5722 kg/h, the total outputs of H2, CO, and CO2 were increased by 1765 Nm3/h and 2063 Nm3/h, respectively, while the CH4 output was decreased by 49 Nm3/h. The coal conversion rate was minimal at low steam input. In addition, more coal gasified in the reductor could increase the output of CH4, while CH4 could reach 1.24% with the coal input in the range of 8000–10,000 kg/h. The present work can offer a further understanding of the gasification performance in the reductor of the full-scale two-stage pressurized entrained-flow gasifier, and motivates the potential for clean utilization of coal resource.

Experimental study of ion beamlet steering by aperture displacement in two‐stage accelerator

1980 ◽  
Vol 51 (4) ◽  
pp. 471-473 ◽  
Author(s):  
Y. Okumura ◽  
Y. Mizutani ◽  
Y. Ohara
Keyword(s):  
Experimental Study ◽  
Two Stage
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