APPLICATION OF IMAGE PROCESSING MEASUREMENT TO A RELATIVE FLOW IN A PUMP-TURBINE RUNNER

1995 ◽  
Vol 2 (1) ◽  
pp. 75-82 ◽  
Author(s):  
Hiroshi Hayami ◽  
Dexin Chen ◽  
Toru Koso
Keyword(s):  
Image Processing ◽  
Pump Turbine ◽  
Turbine Runner ◽  
Processing Measurement ◽  
Relative Flow

scholarly journals Fatigue Life Prediction of a Pump Turbine Runner

2021 ◽  
Vol 627 ◽  
pp. 012025
Author(s):  
Q L He ◽  
T Liu ◽  
X L Yang ◽  
F N Chen ◽  
C Wang ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Fatigue Life Prediction ◽  
Pump Turbine ◽  
Turbine Runner

scholarly journals Development of a pump-turbine runner based on multiobjective optimization

2014 ◽  
Vol 22 (1) ◽  
pp. 012028 ◽  
Author(s):  
W Xuhe ◽  
Z Baoshan ◽  
T Lei ◽  
Z Jie ◽  
C Shuliang
Keyword(s):  
Multiobjective Optimization ◽  
Pump Turbine ◽  
Turbine Runner

scholarly journals Study on Vibration Response of High Head Pump Turbine Runner

2008 ◽  
Vol 3 (1) ◽  
pp. 37-48
Author(s):  
Yasutomo KANEKO ◽  
Yoshihiro IWASAKI
Keyword(s):  
Vibration Response ◽  
Pump Turbine ◽  
Turbine Runner ◽  
High Head

Parallel Simulation of the Turbulent Flow Through a Pump-Turbine Runner

2002 ◽  
Author(s):  
Yu Xu ◽  
Yulin Wu
Keyword(s):  
Turbulent Flow ◽  
Message Passing Interface ◽  
Numerical Procedure ◽  
Parallel Simulation ◽  
Calculation Methods ◽  
Complex Flow ◽  
Pump Turbine ◽  
Parallel Calculation ◽  
Turbine Runner ◽  
Flow Through

In this paper, authors use the parallel calculation methods to solve the incompressible turbulent flow through a pump-turbine runner. The calculation aims at probing the road using parallel calculation methods to simulate complex flow field. The simulation is conducted based on the N-S equations, by using the k-ε model. SIMPLEC algorithm [1] is adopted in the numerical procedure with body-fitted coordination [2] and staggering grid system. The calculation is carried out on the THTF “Explore 108” Cluster Computer, where Solaris8.0 plays the roles of operating system and MPI1.2 as message-passing interface. The results of parallel simulation agree well with those of serial simulation, which shows that the parallel algorithms are feasible and useful to numerical simulation.

scholarly journals Influence of Clearance Flow on Dynamic Hydraulic Forces of Pump-Turbine during Runaway Transient Process

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2830
Author(s):  
Xiaoxia Hou ◽  
Yongguang Cheng ◽  
Zhiyan Yang ◽  
Ke Liu ◽  
Xiaoxi Zhang ◽  
...  
Keyword(s):  
Rotational Speed ◽  
Radial Pressure ◽  
Radial Force ◽  
Flow Channel ◽  
Dominant Factor ◽  
Pump Turbine ◽  
Significance Level ◽  
Turbine Runner ◽  
Clearance Flow ◽  
Flow Evolution

The clearance flow around the pump-turbine runner has significant influences on unit vibrations, which may cause accidents in transient processes. The dynamic hydraulic forces and flow patterns in the clearance flow channel (CFC) of a low specific-speed pump-turbine were analyzed based on 3D CFD simulations during the runaway oscillating process. It is shown that the axial force of the runner periodically fluctuates with large amplitudes, and its components in CFC and the main flow channel (MFC) demonstrate a similar significance level. The CFC component was formulated as a function of the clearance inlet pressure and rotational speed, while the MFC component as a function of the momentum changing rate and the runner outlet pressure force. The fluctuation of runner radial force is mainly caused by the flow evolution in MFC, however, the flow in CFC aggravates it. The pressure in CFC shows a few pulsating signals from MFC, and the radial pressure drop in CFC is proportional to the square of both radius and rotational speed. In CFC, strong rotating shear flow containing a velocity core region in the circumferential direction is formed, and rotational speed is the dominant factor.

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