scholarly journals A review on erosion of a Pelton turbine bucket

2020 ◽  
Vol 1706 ◽  
pp. 012194
Author(s):  
H A Shah ◽  
G C Chaudhari ◽  
V D Dhiman ◽  
F S Ansari ◽  
M N Pathak
Keyword(s):  
Pelton Turbine ◽  
Turbine Bucket

scholarly journals Flow in a Pelton Turbine Bucket: Numerical and Experimental Investigations

2005 ◽  
Vol 128 (2) ◽  
pp. 350-358 ◽  
Author(s):  
Alexandre Perrig ◽  
François Avellan ◽  
Jean-Louis Kueny ◽  
Mohamed Farhat ◽  
Etienne Parkinson
Keyword(s):  
Homogeneous Model ◽  
Free Surface Flow ◽  
Flow Patterns ◽  
Surface Flow ◽  
Experimental Investigations ◽  
Pressure Measurements ◽  
Two Phase ◽  
Pelton Turbine ◽  
Flow Visualizations ◽  
Turbine Bucket

The aim of the paper is to present the results of investigations conducted on the free surface flow in a Pelton turbine model bucket. Unsteady numerical simulations, based on the two-phase homogeneous model, are performed together with wall pressure measurements and flow visualizations. The results obtained allow defining five distinct zones in the bucket from the flow patterns and the pressure signal shapes. The results provided by the numerical simulation are compared for each zone. The flow patterns in the buckets are analyzed from the results. An investigation of the momentum transfer between the water particles and the bucket is performed, showing the regions of the bucket surface that contribute the most to the torque. The study is also conducted for the backside of the bucket, evidencing a probable Coanda interaction between the bucket cutout area and the water jet.

scholarly journals CASTING IMPROVEMENT BASED ON METAHEURISTIC OPTIMIZATION AND NUMERICAL SIMULATION

2017 ◽  
Vol 15 (3) ◽  
pp. 397 ◽  
Author(s):  
Radomir Radiša ◽  
Nedeljko Dučić ◽  
Srećko Manasijević ◽  
Nemanja Marković ◽  
Žarko Ćojbašić
Keyword(s):  
Numerical Simulation ◽  
Design Methodology ◽  
Casting Process ◽  
System Optimization ◽  
Optimization Techniques ◽  
Feeding System ◽  
Pelton Turbine ◽  
Metaheuristic Optimization ◽  
Casting System ◽  
Turbine Bucket

This paper presents the use of metaheuristic optimization techniques to support the improvement of casting process. Genetic algorithm (GA), Ant Colony Optimization (ACO), Simulated annealing (SA) and Particle Swarm Optimization (PSO) have been considered as optimization tools to define the geometry of the casting part’s feeder. The proposed methodology has been demonstrated in the design of the feeder for casting Pelton turbine bucket. The results of the optimization are dimensional characteristics of the feeder, and the best result from all the implemented optimization processes has been adopted. Numerical simulation has been used to verify the validity of the presented design methodology and the feeding system optimization in the casting system of the Pelton turbine bucket.

scholarly journals Improving the surface properties of a Pelton turbine bucket via centrifugal casting technique

2017 ◽  
Vol 9 (10) ◽  
pp. 168781401772908
Author(s):  
Williams S Ebhota ◽  
Akhil S Karun ◽  
Freddie L Inambao
Keyword(s):  
Surface Properties ◽  
Centrifugal Casting ◽  
Casting Technique ◽  
Pelton Turbine ◽  
Turbine Bucket

scholarly journals High Speed Flow Visualisation of an Impinging Jet on a Pelton Turbine Bucket

2007 ◽  
Author(s):  
Alexandre Perrig ◽  
Mohamed Farhat ◽  
Franc¸ois Avellan
Keyword(s):  
High Speed ◽  
Free Surface Flow ◽  
Surface Flow ◽  
Flow Visualisation ◽  
Pelton Turbine ◽  
Flow Development ◽  
Speed Flow ◽  
Turbine Bucket ◽  
Reduced Scale ◽  
Development And Evolution

This paper deals with flow investigations using endoscopes in a single-injector reduced scale Pelton turbine performed with a CMOS high-speed camera. Both onboard and external visualizations techniques of the flow in a bucket are presented. The flow observations evidence the unsteadiness of the successive steps of jet/bucket interaction, free surface flow development and evolution throughout the bucket duty cycle.

scholarly journals Flow Analysis Inside a Pelton Turbine Bucket

2006 ◽  
Vol 128 (3) ◽  
pp. 500-511 ◽  
Author(s):  
B. Zoppé ◽  
C. Pellone ◽  
T. Maitre ◽  
P. Leroy
Keyword(s):  
Numerical Analysis ◽  
Flow Analysis ◽  
Flow Volume ◽  
Volume Of Fluid Method ◽  
Two Phase ◽  
Pelton Turbine ◽  
Wide Range ◽  
Good Consistency ◽  
Turbine Bucket ◽  
Insight Into

The aim of this work is to provide a detailed experimental and numerical analysis of the flow in a fixed bucket of a Pelton turbine. The head, jet incidence, and flow rate have been varied to cover a wide range of the turbine functioning points. The experimental analysis provides measurements of pressure and torque as well as flow visualization. The numerical analysis is performed with the FLUENT code using the two-phase flow volume of fluid method. The results present a good consistency with experimental data. In particular, the pressure distribution is very well predicted for the whole range of the studied parameters. A detailed analysis of torque and thrust allows evaluating the losses due to the edge and the cutout of the bucket. These results give insight into the benefit we can expect of steady flow calculations through the optimization process of the design of Pelton turbines.

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