scholarly journals Field application of a multi-frequency acoustic instrument to monitor sediment for silt erosion study in Pelton turbine in Himalayan region, India

2016 ◽  
Vol 49 ◽  
pp. 122004 ◽  
Author(s):  
A K Rai ◽  
A Kumar ◽  
T Hies ◽  
H H Nguyen
Keyword(s):  
Field Application ◽  
Himalayan Region ◽  
Pelton Turbine ◽  
Silt Erosion

Study of silt erosion mechanism in Pelton turbine buckets

Energy ◽  
2012 ◽  
Vol 39 (1) ◽  
pp. 286-293 ◽  
Author(s):  
M.K. Padhy ◽  
R.P. Saini
Keyword(s):  
Erosion Mechanism ◽  
Pelton Turbine ◽  
Silt Erosion

scholarly journals Selection of Erosive Wear Rate Parameters of Pelton Turbine Buckets using PSI and TOPSIS Techniques

2019 ◽  
Vol 9 (1) ◽  
pp. 2418-2428
Keyword(s):  
Selection Index ◽  
Erosive Wear ◽  
Effective Parameters ◽  
Complex Issue ◽  
Pelton Turbine ◽  
Flow Parameters ◽  
Hydropower Plants ◽  
Silt Erosion ◽  
Optimal Set ◽  
Selection Of

Hydro turbine machineries erosion due to silt is a complex issue for the effective practice of hydropower plants. Erosion caused by silt of the Pelton turbine buckets is a compound phenomenon that depends on size of silt particles , silt particles concentration , velocity of jet , and working time . This paper deals with the influence of silt erosion for various silt loaded factors and effective parameters. The preference selection index (PSI) and technique for order of preference by similarity to ideal solution (TOPSIS) approaches has been adopted to find optimal set of parameters which offers the highest performance for the Pelton turbine. Based up on the results obtained from both PSI and TOPSIS approaches it is found that optimal performance has been provided by A-1 alternate with geometric and flow parameters as , , and respectively

Study of silt erosion on performance of a Pelton turbine

Energy ◽  
2011 ◽  
Vol 36 (1) ◽  
pp. 141-147 ◽  
Author(s):  
M.K. Padhy ◽  
R.P. Saini
Keyword(s):  
Pelton Turbine ◽  
Silt Erosion

A Study of Silt Erosion on Inner Buckets of Pelton Turbines

2014 ◽  
Vol 716-717 ◽  
pp. 644-649
Author(s):  
Su Wei ◽  
Wen Wu Song ◽  
Fu Jie ◽  
Cao Yong
Keyword(s):  
Flow Velocity ◽  
Sediment Concentration ◽  
Continuous Phase ◽  
Two Phase ◽  
Pelton Turbine ◽  
Coupled Calculation ◽  
Sediment Size ◽  
Fluid Analysis ◽  
Motion Characteristics ◽  
Silt Erosion

A 3-D model of pelton turbine bucket was built to investigate the motion characteristics of sediment particles in pelton turbines and the erosion caused by the movement. With the assistance of fluid analysis software FLUENT, A continuous phase turbulence model was estimated by the Euler equation which achieved convergence and the selected coupled calculation for solid-liquid two-phase flow with DPM model was built. It can be draw from the numerical analysis that, with the same size and sediment concentration, the inner bucket wall would suffer from the greater erosion by the relatively greater flow velocity; under the same condition of flow velocity and sediment concentration, the more serious erosion was caused by the bigger sized sediments; and the greater sediment concentration led to greater erosion, given the same flow velocity and sediment size. Based on the study, it showed that the erosion of inner wall of buckets was mainly affected by sediment size and concentration, as well as flow velocity.

Cyathodium denticulatum Udar et Srivastava: A rare liverwort new to Chhattisgarh, Central India

2020 ◽  
pp. 171-174
Author(s):  
Ashwini Kumar Dixit ◽  
Mery Aradhna Kerketta
Keyword(s):  
Rare Species ◽  
Biosphere Reserve ◽  
Central India ◽  
Himalayan Region ◽  
Taxonomic Description ◽  
First Time ◽  
Eastern Himalayan Region

This article reports the occurrence of the thalloid liverwort Cyathodium denticulatum Udar et Srivastava was collected first time from the Achanakmar – Amarkantak Biosphere Reserve (AABR) Bilaspur, Chhattisgarh. It is shown that Cyathodium denticulatum a narrow Himalayan endemic has been reported earlier from Darjeeling, India. There is no record of its occurrence from central India. Cyathodium denticulatum is a rare species known only from eastern Himalayan region. A key to related Indian taxa and taxonomic description is provided.

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