Jitao Liu , Xiaobing Liu , Xiao Chang , Bei Qin , Jiayang Pang , Zhenming Lai , Dengyun Jiang , Mengjun Qin , Bing Yao , Yongzhong Zeng
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引用次数: 0
Abstract
Turbine sediment erosion, which often leads to a reduction in turbine efficiency, damage to Pelton turbine, a reduction in operational stability (especially for 100 MW–500 MW turbines), and frequent overhauling, is a serious problem in plants with high sediment concentrations in the water, resulting in considerable economic losses. Hence, research into sediment erosion in Pelton turbines in sandy rivers aims to uncover the mechanism behind the sediment erosion of Pelton turbines. This investigation holds significant implications for the design and operation of Pelton hydropower plants to combat sediment erosion. In this study, a model turbine with a runner diameter of 400 mm was developed. Through numerical simulations of the model turbine's internal flow and the prediction of sediment erosion, the study analyzed the distribution of sediment volume fraction (concentration) on the bucket's working surface during the intake, retention, and discharge stages, as well as the sediment velocity distribution. Furthermore, the impact of silt particle size on sediment erosion in the Pelton turbine bucket was examined. The effects of silt and water velocity and metal material on the sediment erosion of Pelton turbine buckets were determined through sediment erosion tests, in conjunction with internal flow simulation results. Thus, the sediment erosion mechanism of Pelton turbine buckets was elucidated.
期刊介绍：
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.
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