Design of Pressure Fluctuation Measurement System for Hydro-Turbine Model Test

2013 ◽  
Vol 333-335 ◽  
pp. 353-358
Author(s):  
Hong Jie Wang ◽  
Shi Xun Liu ◽  
De You Li ◽  
Xiao Lin He ◽  
Xian Zhu Wei
Keyword(s):  
Model Test ◽  
Measurement System ◽  
Pressure Fluctuation ◽  
Hydroelectric Plant ◽  
Hydraulic Turbine ◽  
Normal Operation ◽  
Test Bed ◽  
Hydro Turbine ◽  
Fluctuation Measurement ◽  
Turbine Model

With the operation of giant unit of hydroelectric plant represented by the Three Gorges Power Station, the vibration problem of hydraulic turbine set unit is increasingly outstanding, especially the vibration of structure induced by pressure fluctuation. In order to guarantee the normal operation of unit, model test is more important in the respect of predicting performance, increasing stability and avoiding vibration. The pressure fluctuation measurement system based on LabVIEW according to pressure fluctuation model test was designed in this paper. The system is applied to the hydro-turbine model test-bed of HEC so that real-time automatic test with the characteristics of high stability and precision is implemented successfully. It plays an important role in respects of mastering the operation characteristics collecting and analyzing pressure fluctuation signals. Moreover it is meaningful to the hydraulic engineering.

scholarly journals State of the art hydraulic turbine model test

2016 ◽  
Vol 49 ◽  
pp. 062004 ◽  
Author(s):  
Violaine Fabre ◽  
Alexandre Duparchy ◽  
Francois Andre ◽  
Pierre-Yves Larroze
Keyword(s):  
Model Test ◽  
State Of The Art ◽  
Hydraulic Turbine ◽  
Turbine Model

scholarly journals Numerical calculation of axial-flow pump’s pressure fluctuation and model test analysis

2018 ◽  
Vol 10 (4) ◽  
pp. 168781401876977 ◽  
Author(s):  
Chuanliu Xie ◽  
Fangping Tang ◽  
Rentian Zhang ◽  
Wei Zhou ◽  
Wenpeng Zhang ◽  
...  
Keyword(s):  
Numerical Calculation ◽  
Model Test ◽  
Pressure Fluctuation ◽  
Axial Flow ◽  
Test Analysis

Investigations Of Pressure Pulsations In A Model Of Draft Tube Of Hydraulic Turbine Caused By Vortex Rings

2016 ◽  
Vol 11 (4) ◽  
pp. 25-32
Author(s):  
Sergey Skripkin ◽  
Mikhail Tsoy ◽  
Sergey Shtork ◽  
Pavel Kuibin
Keyword(s):  
Vortex Ring ◽  
High Speed ◽  
Draft Tube ◽  
Hydraulic Turbine ◽  
Vortex Rings ◽  
Experimental Investigations ◽  
Visualization Technique ◽  
Vortex Rope ◽  
Hydro Turbine ◽  
Hydraulic Turbines

Current work is devoted to experimental investigations of behavior of precessing vortex rope in a draft tube model of hydraulic turbine. We used combination of stationary and freely rotating swirlers as a hydro turbine model. Such construction provides velocity distribution on the draft tube inlet close to distribution in natural hydraulic turbines operated at non-optimal conditions. The phenomenon of precessing vortex rope reconnection with further formation of vortex ring was founded in this experimental research using high-speed visualization technique. Synchronization of highspeed visualization and pressure measurements allowed us to relate pressure shock on the draft tube wall with vortex ring moving along wall.

The European design of a scalable model test bed and 1 MV source for ITER

1992 ◽  
Author(s):  
R. S. Hemsworth ◽  
C. Jacquot ◽  
J. Paméla ◽  
C. Deck ◽  
L. Doceul ◽  
...  
Keyword(s):  
Model Test ◽  
Test Bed

Inter-Blade Vortex Characteristics With the Blockage Effects of Runner Blade in a Francis Hydro Turbine Model

2019 ◽  
Author(s):  
Seung-Jun Kim ◽  
Jin-Hyuk Kim ◽  
Young-Seok Choi ◽  
Yong Cho ◽  
Jong-Woong Choi
Keyword(s):  
Flow Rate ◽  
Flow Characteristics ◽  
Internal Flow ◽  
Operating Conditions ◽  
Low Flow ◽  
Hydro Turbine ◽  
Runner Blade ◽  
Performance Reduction ◽  
Turbine Model ◽  
Low Flow Rate

Abstract This study presents the numerical analysis on the inter-blade vortex characteristics along with the blockage effects of runner blade in a Francis hydro turbine model with various flow rate conditions. The turbine model showed different flow characteristics in the runner blade passages according to operating conditions, and inter-blade vortex was observed at lower flow rate conditions. This inter-blade vortex can lead to performance reduction, vibration, and instability for smooth operation of turbine systems. The previous study on blockage effects on various runner blade thickness, showed its influence on hydraulic performance and internal flow characteristics at low flow rate conditions. Therefore, the inter-blade vortex characteristics can be altered with the blockage effects at low flow rate conditions in a Francis hydro-turbine. For investigating the internal flow and unsteady pressure characteristics, three-dimensional steady and unsteady Reynolds-averaged Navier-Stokes calculations are performed. These inter-blade vortices were captured at the leading and trailing edges close to the runner hub. These vortex regions showed flow separation and stagnation flow while blockage effects contributed for decreasing the inter-blade vortex at low flow rate conditions.

Comparisons from Sacramento Model Test Bed

2001 ◽  
Vol 1780 (1) ◽  
pp. 53-63 ◽  
Author(s):  
J. D. Hunt ◽  
Robert Johnston ◽  
John E. Abraham ◽  
Caroline J. Rodier ◽  
Gordon R. Garry ◽  
...  
Keyword(s):  
Model Test ◽  
Test Bed
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