欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
高速水流泄水建筑物的某些过流部位常常发生严重的空蚀破坏，掺气减蚀是防止溢洪道空蚀破坏的重要措施。本文采用“8混合湍流模型封闭雷诺应力方程，利用双流体欧拉法处理自由表面及相间的相互作用，在相间作用力本构方程的构建上考虑了湍流扩散的影响，对溢洪道掺气挑坎掺气水流进行水气两相流三维数值模拟研究。研究了溢洪道沿程及断面的掺气浓度分布规律、掺气空腔特性、单宽掺气量和水面线等，探讨了掺气坎坎高、坡度、来流流速与掺气量的关系。数值模拟结果与物理模型试验结果吻合较好，验证了双流体欧拉法研究溢洪道掺气水流的可行性。研究成果为类似工程设计提供参考依据。
英文摘要：
Severe cavitation damage has frequently occurred on water release structure of high velocity. Aeration is an important measure for prevention of cavitation erosion to spillway. This paper adopts a k-e mixture turbulence model to solve the Reynolds stress equation and a two-fluid Euler method to calculate free surface and its interaction, with turbulence diffusion included in the constitutive equation of drag force. Three-dimensional simulations were used to study the water-air two-phase axrbulent flow downstream of a bottom aerator, focusing on air entrainment concentration distribution, aeration cavity characteristics, quantity of entrained air, and water surface profiles. The relationships between aeration height, slope, velocity, and overflow discharge were also examined. The simulations have been verified with experimental data and it shows the feasibility of two-fluid Eulerian method for aerated flow on spillway. The present study would be useful and valuable for similar project designs.
同期刊论文项目
同项目期刊论文
Two-phase flow numerical simulation of a bend-type ice sluice in the diversion water channel of powe
Experimental study on the bed topography evolution in alluvial meandering rivers with various sinuou
Analysis of agricultural pollution by flood flow impact on water quality in a reservoir using a thre
Three-dimensional simulation of the water flow field and the suspended-solids concentration in a cir
Numerical investigation on vortex-induced vibration of an elastically mounted circular cylinder at l
An Integrated Groundwater Management Mode Based on Control Indexes of Groundwater Quantity and Level
Short-term optimal operation of Three-gorge and Gezhouba cascade hydropower stations in non-flood se
Risk identification on hydropower project using the IAHP and extension of TOPSIS methods under inter
The effects of strong motion duration on the dynamic response and accumulated damage of concrete gra
Observation of microscopic damage accumulation in brittle solids subjected to dynamic compressive lo
Laboratory observation of acoustic fluidization in granular fault gouge and implications for dynamic
Laboratory measurements of the rate dependence of the fracture toughness anisotropy of Barre granite
Optimal sensor placement for large structures using the nearest neighbour index and a hybrid swarm i
Joint impact of rainfall and tidal level on flood risk in a coastal city with a complex river networ
Eulerian-Eulerian solid-liquid two-phase flow of sandstone wastewater in a hydropower station rectan
Research on virtual-reality interactive simulation for concrete dam construction process based on ve
Seismic cracking analysis of concrete gravity dams with initial cracks using the extended finite ele
Constructioin Schedule Real-time Control Coupling Consruction Quality in Large Scale Underground Pow
Comprehensive Evaluation of the Coupling Construction Progress and Quality of High Core Rockfill Dam
Joint probability distribution of winds and waves from wave simulation of 20 years (1989-2008) in Bo
Construction Schedules Simulation and Prediction of Water Conveyance Tunnel Based on Karst Geologica
Research on Management Information System for Construction Consultant in Hydropower Project Based on
A Study on the Controllability of Deepwater Manifold during Launch through Pendulous Installation Me
Research on Construction Schedule Real-Time Control of High Core Rock-Fill Dam Based on Digital Moni
Tracking methods for free surface and simulation of a liquid droplet impacting on a solid surface ba
Finite element analysis on thermal upheaval buckling of submarine burial pipelines with initial impe
期刊信息
位置：