61 specialists and scholars assembled at the Institute of Xinjiang ShiheziAgriculture from August 25 to 30,1988,for a seminar on cavitation and cavitationerosion occurred in water conservancy and hydroelectric enginee...61 specialists and scholars assembled at the Institute of Xinjiang ShiheziAgriculture from August 25 to 30,1988,for a seminar on cavitation and cavitationerosion occurred in water conservancy and hydroelectric engineering.The partici-pants came from 33 design and research institutes,universities,factories allover the country.The main subjects under discussion of the conference are:1.展开更多
Completing the principal engineering components of a pumped storage power station spans between 50 and 60 months,from the inception of construction to the commencement of power generation by the first unit.The filling...Completing the principal engineering components of a pumped storage power station spans between 50 and 60 months,from the inception of construction to the commencement of power generation by the first unit.The filling of the penstock with water represents a critical phase preceding the production of electricity by the first unit.During this interval,the construction of the diversion shaft presents multiple challenges,including intricate construction procedures,considerable construction difficulty,elevated safety risks,and quality control issues.To address this issue,this study uses CFD software to analyze the flow field,pressure gradient,and head loss of shaft curved section with different curvature radius,and examines several key technologies by drawing on the practice of diversion shaft construction at the Meizhou pumped storage power station.These technologies include optimizing the curvature radius of the curved section of diversion shaft,reverse-well excavation for the shaft,and sliding-up for the lining concrete.It is found that as the curvature radius of shaft curved section reduces from 4 to 2 times the shaft diameter,the hydraulic characteristic index does not change much,and the increase of head loss accounts for about 0.18%of the total head loss of the water conveyance system.The result show that optimizing the curvature radius from 4 times to 2 times the shaft diameter is feasible and reasonable,and several improved technical measures have been proposed,such as stabilizing drill rods,mechanical scraper systems,and control technology of the relationship between concrete setting time and formwork sliding.Their implementation effectively mitigates difficulties and safety risks during shaft construction,expedites the project schedule,enhances engineering quality,and creates a 41-month timeline for the principal engineering schedule for the first power unit generation in China.展开更多
Aims and Scope Journal of Hydrodynamics(ISSN 1001-6058,e-ISSN 1878-0342)publishes articles in a wide spectrum of hydrodynamic research.It covers advances in theoretical and applied studies of hydrodynamics,and involve...Aims and Scope Journal of Hydrodynamics(ISSN 1001-6058,e-ISSN 1878-0342)publishes articles in a wide spectrum of hydrodynamic research.It covers advances in theoretical and applied studies of hydrodynamics,and involves wide areas of applications,such as naval architecture and ocean engineering,water conservancy and hydroelectric power engineering,mechanical engineering,chemical engineering,energy exploration,environmental engineering,bio-engineering,etc.展开更多
文摘61 specialists and scholars assembled at the Institute of Xinjiang ShiheziAgriculture from August 25 to 30,1988,for a seminar on cavitation and cavitationerosion occurred in water conservancy and hydroelectric engineering.The partici-pants came from 33 design and research institutes,universities,factories allover the country.The main subjects under discussion of the conference are:1.
文摘Completing the principal engineering components of a pumped storage power station spans between 50 and 60 months,from the inception of construction to the commencement of power generation by the first unit.The filling of the penstock with water represents a critical phase preceding the production of electricity by the first unit.During this interval,the construction of the diversion shaft presents multiple challenges,including intricate construction procedures,considerable construction difficulty,elevated safety risks,and quality control issues.To address this issue,this study uses CFD software to analyze the flow field,pressure gradient,and head loss of shaft curved section with different curvature radius,and examines several key technologies by drawing on the practice of diversion shaft construction at the Meizhou pumped storage power station.These technologies include optimizing the curvature radius of the curved section of diversion shaft,reverse-well excavation for the shaft,and sliding-up for the lining concrete.It is found that as the curvature radius of shaft curved section reduces from 4 to 2 times the shaft diameter,the hydraulic characteristic index does not change much,and the increase of head loss accounts for about 0.18%of the total head loss of the water conveyance system.The result show that optimizing the curvature radius from 4 times to 2 times the shaft diameter is feasible and reasonable,and several improved technical measures have been proposed,such as stabilizing drill rods,mechanical scraper systems,and control technology of the relationship between concrete setting time and formwork sliding.Their implementation effectively mitigates difficulties and safety risks during shaft construction,expedites the project schedule,enhances engineering quality,and creates a 41-month timeline for the principal engineering schedule for the first power unit generation in China.
文摘Aims and Scope Journal of Hydrodynamics(ISSN 1001-6058,e-ISSN 1878-0342)publishes articles in a wide spectrum of hydrodynamic research.It covers advances in theoretical and applied studies of hydrodynamics,and involves wide areas of applications,such as naval architecture and ocean engineering,water conservancy and hydroelectric power engineering,mechanical engineering,chemical engineering,energy exploration,environmental engineering,bio-engineering,etc.
