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YAN Jun CAO Zhi-xian State Key Laboratory of Water Resources Hydropower Engineering Science Wuhan University Wuhan ChinaLIU Huai-han Changjiang Waterway Institute of Planning Design Research Wuhan China CHEN Li State Key Laboratory of Water Resources Hydropower Engineering Science Wuhan China 《水动力学研究与进展(B辑)》2009,21(1):124-130
Large-scale landslide dams may block the river flow and cause inundation upstream,and subsequently fail and result in severe flooding and damage in the downstream.The need for enhanced understanding of the inundation and flooding is evident.This article presents an experimental study of the inundation and landslide dam-break flooding over erodible bed in open channels.A set of automatic water-level probes is deployed to record the highly transient stage,and the post-flooding channel bed elevation is measured.New experimental data resources are provided for understanding the processes of landslide-induced flooding and for testing mathematical rivers models. 相似文献
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Gas-liquid two-phase flow occurs increasingly in some dynamic devices operating in the oceanic condition. The relative data are limited with respect to flow characteristics, so the present study is to investigate systematically single-phase pressure drop, and to develop the theory for frictional factor under the rolling condition. Using deionized water as the test fluid, a series of experiments of single–phase flow were conducted in pipe with the inner diameter of 34.5 mm. The test section was horizontally settled on the rolling apparatus, and its regularity was similar to simple harmonic motion. It is found that the pressure drop during rolling motion fluctuate with the change of the rolling period and rolling angle, which is significantly different from fluid motion in a steady state. By the contrast between experiment results and stable-state theory values, existing correlations can not predict present frictional factor very well. Therefore, in the present article, the single-phase frictional factor is correlated with the Reynolds number for rolling motion, and its computated results agree well with experimental data. 相似文献
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青海公伯峡水电站厂房施工期间一年中有近半年时间为低温期(当年10月至次年3月),低温期的平均气温为-8℃,年平均最低气温为-12.5℃。为保证电站厂房混凝土在低温期的施工质量,保证1#机组提前4个月发电目标的实现,施工中采取了一系列防寒保温措施,保质保量地完成了任务。 相似文献
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