期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
非淹没组合丁坝局部冲蚀规律的实验分析研究
1
作者 卢国伟 《黑龙江水利科技》 2019年第11期16-19,137,共5页
文章根据实验情况介绍、工况及对应丁坝工作性征计算结果,对非淹没组合丁坝局部冲蚀规律进行实验分析。把握组合丁坝局部冲蚀规律,对组合丁坝设计和安全管理有重要参考和应用价值。文章依托渭河中段某非淹没组合丁坝护岸工程实用资料,... 文章根据实验情况介绍、工况及对应丁坝工作性征计算结果,对非淹没组合丁坝局部冲蚀规律进行实验分析。把握组合丁坝局部冲蚀规律,对组合丁坝设计和安全管理有重要参考和应用价值。文章依托渭河中段某非淹没组合丁坝护岸工程实用资料,以实验室比尺模型实验的方式,对非淹没组合丁坝局部冲蚀规律开展专题实验研究,分析组合丁坝工作特性,探讨其冲刷流性征,以为同类工程应用提供研究和技术参考。 展开更多
关键词 组合丁坝 非淹没 局部冲蚀 关联规律 模拟实验 分析研究
下载PDF
气体携砂对弯头局部冲蚀规律实验探讨 被引量:3
2
作者 敬加强 周怡诺 +3 位作者 郑思佳 王凯 邱宗君 江漩涛 《腐蚀科学与防护技术》 CAS CSCD 北大核心 2015年第5期437-443,共7页
通过电火花数控线性切割机将弯头沿轴向剖开的实验方法,研究了Si O2颗粒对弯头冲蚀后的壁厚损失及微观形态,并分析了弯头磨损的分布与强度。结果表明,管流状态下颗粒对弯头的冲蚀主要集中于弯头外半圈,弯头外半圈质量损失与弯头内半圈... 通过电火花数控线性切割机将弯头沿轴向剖开的实验方法,研究了Si O2颗粒对弯头冲蚀后的壁厚损失及微观形态,并分析了弯头磨损的分布与强度。结果表明,管流状态下颗粒对弯头的冲蚀主要集中于弯头外半圈,弯头外半圈质量损失与弯头内半圈质量损失比(定义为α)随着颗粒粒径增大而增大;小粒径颗粒对弯头冲蚀区域的影响较大而对壁厚损失影响相对较小,弯头(R=1.5D)最大冲蚀角为55°,此时颗粒对壁面的冲蚀作用最大,最容易造成磨损刺穿而导致弯头失效;冲蚀坑随着颗粒粒径增大而变大,但数量相对减少,颗粒对弯头的主要磨蚀机理是变形磨损,次要机理是低角度的微削磨损,它们的综合影响造成了弯头的穿孔刺漏。 展开更多
关键词 弯头 局部冲蚀 气体携砂 变形磨损
原文传递
Local Scour and the Laws of Scour Pit's Shape Downstream of Debris Flow Sabo Dam 被引量:4
3
作者 PAN Hua-li YANG Shun +1 位作者 OU Guo-qiang HUANG Jiang-cheng 《Journal of Mountain Science》 SCIE CSCD 2013年第6期1063-1073,共11页
The erosion shape and the law of development of debris flow sabo dam downstream is a weak part in the study on debris flow erosion. The shape and development of scour pit have an important effect on the stability and ... The erosion shape and the law of development of debris flow sabo dam downstream is a weak part in the study on debris flow erosion. The shape and development of scour pit have an important effect on the stability and safety of debris flow sabo dam, which determines the foundational depth of the dam and the design of protective measures downstream. Study on the scouring law of sabo dam downstream can evaluate the erosion range and reasonably arrange auxiliary protective engineering. Therefore, a series of flume experiments are carried out including different debris flow characteristics (density is varying from 1.5 t/m3 to 2.1 t/m~) and different gully longitudinal slopes. The result shows that the scour pit appears as an oval shape in a plane and deep in the middle while superficial at the ends in the longitudinal section, the position of the maximum depth point moves towards downstream with an increase of flume slope angle. The maximum depth of scour pit is mainly affected by the longitudinal slope of gully, density of debris flow, and the characteristics of gully composition (particle size and the viscosity of soil). The result also indicates that the viscosity of soil will weaken the erosion extent. The interior slopes of scour pit are different between the upstream and the downstream, and the downstream slope is smaller than the upper one. For the viscous and non-viscous sands with the same distribution of gradation, the interior slope of non- viscous sand is smaller than the viscous sand.According to tbe regression analysis on the experimental data, the quantitative relationship between the interior slope of scour pit, slope of repose under water and the longitudinal slope of gully is established and it can be used to calculate the interior slope of scour pit. The results can provide the basis for the parameter design of the debris flow control engineering foundation. 展开更多
关键词 Scour pit Debris flow Sabo dam Scouring law Interior slope Flume experiment
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部