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ZHUANG Yuan LIU Zu-yuan 《船舶与海洋工程学报》2007,6(1):53-57
At present, the method of calculating the turbulent flow width around the bridge pier is not given in the "Standard for Inland River Navigation" (GB50139-2004) in China, and the bridge designer usually increases the bridge span in order to ensure the navigation safety, which increases both of the structural design difficulty and the project investments. Therefore, it is extremely essential to give a research on the turbulent flow width around the bridge pier. Through the experiments of the fixed bed and the mobile bed, the factors influencing the turbulent flow width around the bridge pier have been analyzed, such as the approaching flow speed, the water depth, the angles between the bridge pier and the flow direction, the sizes of bridge pier, the shapes of the bridge pier, and the scouring around the bridge pier, etc. Through applying the dimension analytic method to the measured data, the formula of calculating the turbulent flow width around the bridge pier is then inferred. 相似文献
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生物沸石流化床对有机物处理的试验研究 总被引:1,自引:0,他引:1
本试验采用了一种新的处理工艺-生物沸石流化床,对微污染水源水中有机物进行了处理,同时与生物沸石固定床作了对比。结果表明,在相同条件下,生物沸石流化床对有机物有较好的去除效果,且去除率高于生物沸石固定床。 相似文献
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庄元 《西南交通大学学报(英文版)》2007,15(1):45-48
Introduction The fluid state near a bridge pier usually changesshortly after the new bridge is built. The unsafe navi-gational area around the bridge pier, where the shipcollisions against bridge piers frequently occur, is de-scribed by turbulent width.Ch… 相似文献
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伴有堆积层的管道速度分布规律研究 总被引:1,自引:1,他引:0
对具有固定床的水平管道断面的紊流速度分布进行研究。将整个断面分为两部分:一部分为弓形断面,另一部分为固定床断面。弓形断面的速度分布研究是基于圆形断面管道紊流的理论,并且结合一定的假设来数值模拟弓形断面管道的紊流速度分布规律。固定床断面的速度分布研究是基于Ergun理论,最后通过一定的边界条件将两部分断面速度分布组合成整个断面的速度分布。通过大量的实验证明:该研究方法及程序较好地模拟了此断面的紊流速度分布。 相似文献
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